Security Bulletin

Microsoft Security Bulletin MS10-012 - Important

Vulnerabilities in SMB Server Could Allow Remote Code Execution (971468)

Published: February 09, 2010 | Updated: February 10, 2010

Version: 1.1

General Information

Executive Summary

This security update resolves several privately reported vulnerabilities in Microsoft Windows. The most severe of these vulnerabilities could allow remote code execution if an attacker created a specially crafted SMB packet and sent the packet to an affected system. Firewall best practices and standard default firewall configurations can help protect networks from attacks originating outside the enterprise perimeter that would attempt to exploit these vulnerabilities.

This security update is rated Important for all supported editions of Microsoft Windows. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses these vulnerabilities by correcting the way that SMB validates SMB requests. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation.  The majority of customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. None

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software

Operating System Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update
Microsoft Windows 2000 Service Pack 4 Remote Code Execution Important MS09-001
Windows XP Service Pack 2 and Windows XP Service Pack 3 Remote Code Execution Important MS09-001
Windows XP Professional x64 Edition Service Pack 2 Remote Code Execution Important MS09-001
Windows Server 2003 Service Pack 2 Remote Code Execution Important MS09-001
Windows Server 2003 x64 Edition Service Pack 2 Remote Code Execution Important MS09-001
Windows Server 2003 with SP2 for Itanium-based Systems Remote Code Execution Important MS09-001
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 Remote Code Execution Important MS09-001
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 Remote Code Execution Important MS09-001
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2* Remote Code Execution Important MS09-001
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2* Remote Code Execution Important MS09-001
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Remote Code Execution Important MS09-001
Windows 7 for 32-bit Systems Remote Code Execution Important None
Windows 7 for x64-based Systems Remote Code Execution Important None
Windows Server 2008 R2 for x64-based Systems* Remote Code Execution Important None
Windows Server 2008 R2 for Itanium-based Systems Remote Code Execution Important None

*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

Where are the file information details?
Refer to the reference tables in the Security Update Deployment section for the location of the file information details.

Why does this update address several reported security vulnerabilities?
This update contains support for several vulnerabilities because the modifications that are required to address these issues are located in related files. Instead of having to install several updates that are almost the same, customers need to install this update only.

Is this security update related to MS10-006, released on February 9, 2010?
No. Microsoft Security Bulletin MS10-006, "Vulnerabilities in SMB Client Could Allow Remote Code Execution," addresses different SMB components. This security update may be applied independently of any other update.

If I have installed the MS10-006 update, do I still need to install this update?
Yes. This security bulletin update addresses vulnerabilities in Windows SMB Server components, while MS10-006 addresses vulnerabilities in Windows SMB Client components.

I am using an older release of the software discussed in this security bulletin. What should I do?
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, visit the Microsoft Support Lifecycle Web site.

It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Lifecycle Supported Service Packs.

Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit the Microsoft Worldwide Information Web site, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the February bulletin summary. For more information, see Microsoft Exploitability Index.

Affected Software SMB Pathname Overflow Vulnerability - CVE-2010-0020 SMB Memory Corruption Vulnerability - CVE-2010-0021 SMB Null Pointer Vulnerability - CVE-2010-0022 SMB NTLM Authentication Lack of Entropy Vulnerability - CVE-2010-0231 Aggregate Severity Rating
Microsoft Windows 2000 Service Pack 4 Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows XP Service Pack 2 and Windows XP Service Pack 3 Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows XP Professional x64 Edition Service Pack 2 Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2003 Service Pack 2 Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2003 x64 Edition Service Pack 2 Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2003 with SP2 for Itanium-based Systems Important \ Remote Code Execution Not applicable Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2* Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2* Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows 7 for 32-bit Systems Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows 7 for x64-based Systems Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2008 R2 for x64-based Systems* Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important
Windows Server 2008 R2 for Itanium-based Systems Important \ Remote Code Execution Important \ Denial of Service Important \ Denial of Service Important \ Elevation of Privilege Important

*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 and Windows Server 2008 R2, whether or not installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

SMB Pathname Overflow Vulnerability - CVE-2010-0020

An authenticated remote code execution vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attacker could exploit the vulnerability by sending a specially crafted network message to a system running the Server service as an authenticated user. While an attacker who successfully exploited this vulnerability could take complete control of the affected system, attempts to exploit this vulnerability will most probably result in a Denial of Service condition.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0020.

Mitigating Factors for SMB Pathname Overflow Vulnerability - CVE-2010-0020

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • In Windows Vista and Windows 7, if the network profile is set to "Public", the system is not affected by this vulnerability since unsolicited inbound network packets are blocked by default.
  • Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the SMB ports should be blocked from the Internet.
  • An attacker must have valid logon credentials to exploit this vulnerability. The vulnerability could not be exploited by anonymous users.

Workarounds for SMB Pathname Overflow Vulnerability - CVE-2010-0020

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Block TCP ports 139 and 445 at the firewall

    These ports are used to initiate a connection with the affected component. Blocking TCP ports 139 and 445 at the firewall will help protect systems that are behind that firewall from attempts to exploit this vulnerability. Microsoft recommends that you block all unsolicited inbound communication from the Internet to help prevent attacks that may use other ports. For more information about ports, see the TechNet article, TCP and UDP Port Assignments.

    Impact of workaround. Several Windows services use the affected ports. Blocking connectivity to the ports may cause various applications or services to not function. Some of the applications or services that could be impacted are listed below:

    • Applications that use SMB (CIFS)
    • Applications that use mailslots or named pipes (RPC over SMB)
    • Server (File and Print Sharing)
    • Group Policy
    • Net Logon
    • Distributed File System (DFS)
    • Terminal Server Licensing
    • Print Spooler
    • Computer Browser
    • Remote Procedure Call Locator
    • Fax Service
    • Indexing Service
    • Performance Logs and Alerts
    • Systems Management Server
    • License Logging Service

    How to undo the workaround. Unblock TCP ports 139 and 445 at the firewall. For more information about ports, see TCP and UDP Port Assignments.

FAQ for SMB Pathname Overflow Vulnerability - CVE-2010-0020

What is the scope of the vulnerability? 
This is a remote code execution vulnerability. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

What causes the vulnerability? 
The vulnerability is caused by the Microsoft Server Message Block (SMB) implementation improperly validating fields in a malformed SMB request.

What is Microsoft Server Message Block (SMB) protocol? 
Microsoft Server Message Block (SMB) Protocol is a Microsoft network file sharing protocol used in Microsoft Windows. For more information on SMB see Microsoft SMB Protocol and CIFS Protocol Overview.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could take complete control of an affected system.

How could an attacker exploit the vulnerability? 
An attacker could try to exploit the vulnerability by creating a specially crafted SMB packet and sending the packet to an affected system.

What systems are primarily at risk from the vulnerability? 
All systems with the SMB Server service are affected by this vulnerability. Domain controllers are at a greater risk from exploitation of this vulnerability, as these systems have network shares open to all domain users by default.

What does the update do? 
The update addresses the vulnerability by correcting the way that SMB validates fields in a malformed SMB request.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

SMB Memory Corruption Vulnerability - CVE-2010-0021

A denial of service vulnerability exists in the way that in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted network message to a computer running the Server service.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0021.

Mitigating Factors for SMB Memory Corruption Vulnerability - CVE-2010-0021

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • In Windows Vista and Windows 7, if the network profile is set to "Public", the system is not affected by this vulnerability since unsolicited inbound network packets are blocked by default.
  • Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the SMB ports should be blocked from the Internet.

Workarounds for SMB Memory Corruption Vulnerability - CVE-2010-0021

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Block TCP ports 139 and 445 at the firewall

    These ports are used to initiate a connection with the affected component. Blocking TCP ports 139 and 445 at the firewall will help protect systems that are behind that firewall from attempts to exploit this vulnerability. Microsoft recommends that you block all unsolicited inbound communication from the Internet to help prevent attacks that may use other ports. For more information about ports, see the TechNet article, TCP and UDP Port Assignments.

    Impact of workaround. Several Windows services use the affected ports. Blocking connectivity to the ports may cause various applications or services to not function. Some of the applications or services that could be impacted are listed below:

    • Applications that use SMB (CIFS)
    • Applications that use mailslots or named pipes (RPC over SMB)
    • Server (File and Print Sharing)
    • Group Policy
    • Net Logon
    • Distributed File System (DFS)
    • Terminal Server Licensing
    • Print Spooler
    • Computer Browser
    • Remote Procedure Call Locator
    • Fax Service
    • Indexing Service
    • Performance Logs and Alerts
    • Systems Management Server
    • License Logging Service

    How to undo the workaround. Unblock TCP ports 139 and 445 at the firewall. For more information about ports, see TCP and UDP Port Assignments.

FAQ for SMB Memory Corruption Vulnerability - CVE-2010-0021

What is the scope of the vulnerability? 
This is a denial of service vulnerability. An attacker who exploited this vulnerability could cause the affected system to stop responding until it is manually restarted. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate their user rights, but it could cause the affected system to stop accepting requests.

What causes the vulnerability? 
The vulnerability is caused by the Microsoft Server Message Block (SMB) protocol software improperly handling a race condition that can occur when parsing SMB packets during the Negotiate phase. This vulnerability affects SMB version 1 and SMB version 2.

What is Microsoft Server Message Block (SMB) protocol? 
Microsoft Server Message Block (SMB) protocol is a Microsoft network file sharing protocol used in Microsoft Windows. For more information on SMB see Microsoft SMB Protocol and CIFS Protocol Overview.

What is Microsoft Server Message Block Version 2 (SMBv2)? 
Server Message Block (SMB) is the file sharing protocol used by default on Windows-based computers. SMB Version 2.0 (SMBv2) is an update to this protocol, and is only supported on computers running Windows Server 2008, Windows 7, and Windows Vista. SMBv2 can only be used if both client and server support it. If either client or server cannot support SMBv2, the SMB 1.0 protocol will be used instead. The SMB protocol version to be used for file operations is decided during the negotiation phase. During the negotiation phase, a Windows Vista client advertises to the server that it can understand the new SMBv2 protocol. If the server (Windows Server 2008 or later) understands SMBv2, then SMBv2 is chosen for subsequent communication. Otherwise the client and server use SMB 1.0 and continue to function as normal. For more information on SMBv2, see the MSDN article, Server Message Block (SMB) Version 2 Protocol Specification.

What is the difference between SMBv1 and SMBv2? 
Both protocols are used by clients to request file and print services from a server system over the network. Both are stateful protocols in which clients establish a connection to a server, establish an authenticated context on that connection, and then issue a variety of requests to access files, printers, and named pipes for inter-process communication. The SMBv2 protocol is a major revision of the existing SMB protocol. While many of the underlying concepts are the same, the packet formats are completely different. In addition to providing all of the capabilities found in SMBv1, the SMBv2 protocol provides several enhancements:

  • Allowing an open to a file to be reestablished after a client connection becomes temporarily disconnected.
  • Allowing the server to balance the number of simultaneous operations that a client can have outstanding at any time.
  • Providing scalability in terms of the number of shares, users, and simultaneously open files.
  • Supporting symbolic links.
  • Using a stronger algorithm to validate the integrity of requests and responses.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could cause a user's system to stop responding until manually restarted.

How could an attacker exploit the vulnerability? 
An attacker could try to exploit the vulnerability by creating a specially crafted SMB packet and sending the packet to an affected system.

What systems are primarily at risk from the vulnerability? 
All systems with SMB Server service are affected by this vulnerability. Domain controllers are at a greater risk from exploitation of this vulnerability, as these systems have network shares open to all domain users by default.

What does the update do? 
The security update addresses the vulnerability by correcting the manner in which SMB parses specially crafted SMB packets.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

SMB Null Pointer Vulnerability - CVE-2010-0022

A denial of service vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB (SMB) packets. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted network message to a computer running the Server service. An attacker who successfully exploited this vulnerability could cause the computer to stop responding until restarted.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0022.

Mitigating Factors for SMB Null Pointer Vulnerability - CVE-2010-0022

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • In Windows Vista and Windows 7, if the network profile is set to "Public", the system is not affected by this vulnerability since unsolicited inbound network packets are blocked by default.
  • This vulnerability would not allow an attacker to execute code or elevate their user rights, but it could cause the affected system to stop responding until manually restarted.
  • Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the SMB ports should be blocked from the Internet.

Workarounds for SMB Null Pointer Vulnerability - CVE-2010-0022

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Block TCP ports 139 and 445 at the firewall

    These ports are used to initiate a connection with the affected component. Blocking TCP ports 139 and 445 at the firewall will help protect systems that are behind that firewall from attempts to exploit this vulnerability. Microsoft recommends that you block all unsolicited inbound communication from the Internet to help prevent attacks that may use other ports. For more information about ports, see the TechNet article, TCP and UDP Port Assignments.

    Impact of workaround. Several Windows services use the affected ports. Blocking connectivity to the ports may cause various applications or services to not function. Some of the applications or services that could be impacted are listed below:

    • Applications that use SMB (CIFS)
    • Applications that use mailslots or named pipes (RPC over SMB)
    • Server (File and Print Sharing)
    • Group Policy
    • Net Logon
    • Distributed File System (DFS)
    • Terminal Server Licensing
    • Print Spooler
    • Computer Browser
    • Remote Procedure Call Locator
    • Fax Service
    • Indexing Service
    • Performance Logs and Alerts
    • Systems Management Server
    • License Logging Service

    How to undo the workaround. Unblock TCP ports 139 and 445 at the firewall. For more information about ports, see TCP and UDP Port Assignments.

  • Disable SMB v2

    Note See Microsoft Knowledge Base Article 975517 to use the automated Microsoft Fix it solution to enable or disable this workaround.

    To modify the registry key, perform the following steps:

    Note Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or view the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe.

    1. Click Start, click Run, type Regedit in the Open box, and then click OK.
    2. Locate and then click the following registry subkey:
      HKEY\_LOCAL\_MACHINE\\System\\CurrentControlSet\\Services
    3. Click LanmanServer.
    4. Click Parameters.
    5. Right-click to add a new DWORD (32 bit) Value.
    6. Enter smb2 in the Name data field, and change the Value data field to 0.
    7. Exit.
    8. Restart the "Server" service by performing one of the following:
      • Open up the computer management MMC, navigate to Services and Applications, click Services, right-click the Server service name and click Restart. Answer Yes in the pop-up menu.
      • From a command prompt and with administrator privileges, type net stop server and then net start server.

    Impact of workaround. The host will not communicate using SMBv2. Instead, the host will communicate using SMB 1.0. This should not impact basic services such as file and printer sharing. These will continue to function as normal.

    How to undo the workaround:

    1. Click Start, click Run, type Regedit in the Open box, and then click OK.
    2. Locate and then click the following registry subkey:
      HKEY\_LOCAL\_MACHINE\\System\\CurrentControlSet\\Services
    3. Click LanmanServer.
    4. Click Parameters.
    5. Double-click smb2, and change the Value data field to 1.
    6. Exit.
    7. Restart the "Server" service by performing one of the following:
      • Open up the computer management MMC, navigate to Services and Applications, click Services, right-click the Server service name and click Restart. Answer Yes in the pop-up menu.
      • From a command prompt and with administrator privileges, type net stop server and then net start server.

FAQ for SMB Null Pointer Vulnerability - CVE-2010-0022

What is the scope of the vulnerability? 
This is a denial of service vulnerability. An attacker who exploited this vulnerability could cause the affected system to stop responding until it is manually restarted. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate their user rights, but it could cause the affected system to stop accepting requests.

What causes the vulnerability? 
The vulnerability is caused by the Microsoft Server Message Block (SMB) Protocol software improperly verifying the share and servername fields in malformed SMB packets.

What is Microsoft Server Message Block (SMB) protocol? 
Microsoft Server Message Block (SMB) protocol is a Microsoft network file sharing protocol used in Microsoft Windows. For more information on SMB see Microsoft SMB Protocol and CIFS Protocol Overview.

What is Microsoft Server Message Block Version 2 (SMBv2)? 
Server Message Block (SMB) is the file sharing protocol used by default on Windows-based computers. SMB Version 2.0 (SMBv2) is an update to this protocol, and is only supported on computers running Windows Server 2008, Windows 7, and Windows Vista. SMBv2 can only be used if both client and server support it. If either client or server cannot support SMBv2, the SMB 1.0 protocol will be used instead. The SMB protocol version to be used for file operations is decided during the negotiation phase. During the negotiation phase, a Windows Vista client advertises to the server that it can understand the new SMBv2 protocol. If the server (Windows Server 2008 or later) understands SMBv2, then SMBv2 is chosen for subsequent communication. Otherwise the client and server use SMB 1.0 and continue to function as normal. For more information on SMBv2, see the MSDN article, Server Message Block (SMB) Version 2 Protocol Specification.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could cause a user's system to stop responding until manually restarted.

How could an attacker exploit the vulnerability? 
An attacker could try to exploit the vulnerability by creating a specially crafted SMB packet and sending the packet to an affected system.

What systems are primarily at risk from the vulnerability? 
All systems with SMB Server service are affected by this vulnerability. Domain controllers are at a greater risk from exploitation of this vulnerability, as these systems have network shares open to all domain users by default.

What does the update do? 
The security update addresses the vulnerability by correctly validating the fields inside the SMB packets.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

SMB NTLM Authentication Lack of Entropy Vulnerability - CVE-2010-0231

An unauthenticated elevation of privilege vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles authentication attempts. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending large amounts of authentication requests to the SMB server. An attacker who successfully exploited this vulnerability could access the SMB service on the target user under the credentials of an authorized user.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0231.

Mitigating Factors for SMB NTLM Authentication Lack of Entropy Vulnerability - CVE-2010-0231

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the SMB ports should be blocked from the Internet.

Workarounds for SMB NTLM Authentication Lack of Entropy Vulnerability - CVE-2010-0231

Microsoft has not identified any workarounds for this vulnerability.

FAQ for SMB NTLM Authentication Lack of Entropy Vulnerability - CVE-2010-0231

What is the scope of the vulnerability? 
This is an elevation of privilege vulnerability. An attacker who successfully exploited this vulnerability could authenticate successfully against a target system without requiring accurate authentication credentials. An attacker could then upload and download files, and access SMB network resources available to that user.

What causes the vulnerability? 
This vulnerability is caused by a lack of cryptographic entropy when the SMB server generates challenges and presents them to a connecting client. This could cause an attacker to continuously attempt to authenticate against the SMB server and subsequently cause that server to generate duplicate values.

What is Microsoft Server Message Block (SMB) protocol? 
Microsoft Server Message Block (SMB) protocol is a Microsoft network file sharing protocol used in Microsoft Windows. For more information on SMB see Microsoft SMB Protocol and CIFS Protocol Overview.

What might an attacker use the vulnerability to do? 
An attacker who successfully exploited this vulnerability could upload and download files, and access SMB network resources available to the user whose account the attacker is able to access.

How could an attacker exploit the vulnerability? 
An attacker could try to exploit the vulnerability by continuously attempting to authenticate against a server, and reusing information from those failed connections to spoof a valid authentication token.

What systems are primarily at risk from the vulnerability? 
All systems with the SMB Server service are affected by this vulnerability. Domain controllers are at a greater risk from exploitation of this vulnerability, as these systems have network shares open to all domain users by default.

What does the update do? 
The update addresses the vulnerability by ensuring the SMB server uses a cryptographic provider with sufficient entropy guarantees.

When this security bulletin was issued, had this vulnerability been publicly disclosed? 
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited? 
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

Update Information

Detection and Deployment Tools and Guidance

Manage the software and security updates you need to deploy to the servers, desktop, and mobile systems in your organization. For more information see the TechNet Update Management Center. The Microsoft TechNet Security Web site provides additional information about security in Microsoft products.

Security updates are available from Microsoft Update and Windows Update. Security updates are also available from the Microsoft Download Center. You can find them most easily by doing a keyword search for "security update."

Finally, security updates can be downloaded from the Microsoft Update Catalog. The Microsoft Update Catalog provides a searchable catalog of content made available through Windows Update and Microsoft Update, including security updates, drivers and service packs. By searching using the security bulletin number (such as, "MS07-036"), you can add all of the applicable updates to your basket (including different languages for an update), and download to the folder of your choosing. For more information about the Microsoft Update Catalog, see the Microsoft Update Catalog FAQ.

Note Microsoft discontinued support for Office Update and the Office Update Inventory Tool as of August 1, 2009. To continue getting the latest updates for Microsoft Office products, use Microsoft Update. For more information, see About Microsoft Office Update: Frequently Asked Questions.

Detection and Deployment Guidance

Microsoft provides detection and deployment guidance for security updates. This guidance contains recommendations and information that can help IT professionals understand how to use various tools for detection and deployment of security updates. For more information, see Microsoft Knowledge Base Article 961747.

Microsoft Baseline Security Analyzer

Microsoft Baseline Security Analyzer (MBSA) allows administrators to scan local and remote systems for missing security updates as well as common security misconfigurations. For more information about MBSA, visit Microsoft Baseline Security Analyzer.

The following table provides the MBSA detection summary for this security update.

Software MBSA 2.1.1
Microsoft Windows 2000 Service Pack 4 Yes
Windows XP Service Pack 2 and Windows XP Service Pack 3 Yes
Windows XP Professional x64 Edition Service Pack 2 Yes
Windows Server 2003 Service Pack 2 Yes
Windows Server 2003 x64 Edition Service Pack 2 Yes
Windows Server 2003 with SP2 for Itanium-based Systems Yes
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 Yes
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 Yes
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 Yes
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2 Yes
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Yes
Windows 7 for 32-bit Systems Yes
Windows 7 for x64-based Systems Yes
Windows Server 2008 R2 for x64-based Systems Yes
Windows Server 2008 R2 for Itanium-based Systems Yes

The latest version of MBSA has been released: Microsoft Baseline Security Analyzer 2.1.1. For more information, see Microsoft Baseline Security Analyzer 2.1.

Windows Server Update Services

By using Windows Server Update Services (WSUS), administrators can deploy the latest critical updates and security updates for Microsoft Windows 2000 operating systems and later, Office XP and later, Exchange Server 2003, and SQL Server 2000. For more information about how to deploy this security update using Windows Server Update Services, visit the Windows Server Update Services Web site.

Systems Management Server

The following table provides the SMS detection and deployment summary for this security update.

Software SMS 2.0 SMS 2003 with SUIT SMS 2003 with ITMU Configuration Manager 2007
Microsoft Windows 2000 Service Pack 4 Yes Yes Yes Yes
Windows XP Service Pack 2 and Windows XP Service Pack 3 Yes Yes Yes Yes
Windows XP Professional x64 Edition Service Pack 2 No No Yes Yes
Windows Server 2003 Service Pack 2 Yes Yes Yes Yes
Windows Server 2003 x64 Edition Service Pack 2 No No Yes Yes
Windows Server 2003 with SP2 for Itanium-based Systems No No Yes Yes
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 No No Yes Yes
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 No No Yes Yes
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 No No Yes Yes
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2 No No Yes Yes
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 No No Yes Yes
Windows 7 for 32-bit Systems No No Yes Yes
Windows 7 for x64-based Systems No No Yes Yes
Windows Server 2008 R2 for x64-based Systems No No Yes Yes
Windows Server 2008 R2 for Itanium-based Systems No No Yes Yes

For SMS 2.0 and SMS 2003, the Security Update Inventory Tool (SUIT) can be used by SMS to detect security updates. See also Downloads for Systems Management Server 2.0.

For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered by Microsoft Update and that are supported by Windows Server Update Services. For more information about the SMS 2003 ITMU, see SMS 2003 Inventory Tool for Microsoft Updates. For more information about SMS scanning tools, see SMS 2003 Software Update Scanning Tools. See also Downloads for Systems Management Server 2003.

System Center Configuration Manager 2007 uses WSUS 3.0 for detection of updates. For more information about Configuration Manager 2007 Software Update Management, visit System Center Configuration Manager 2007.

For more information about SMS, visit the SMS Web site.

For more detailed information, see Microsoft Knowledge Base Article 910723: Summary list of monthly detection and deployment guidance articles.

Update Compatibility Evaluator and Application Compatibility Toolkit

Updates often write to the same files and registry settings required for your applications to run. This can trigger incompatibilities and increase the time it takes to deploy security updates. You can streamline testing and validating Windows updates against installed applications with the Update Compatibility Evaluator components included with Application Compatibility Toolkit.

The Application Compatibility Toolkit (ACT) contains the necessary tools and documentation to evaluate and mitigate application compatibility issues before deploying Microsoft Windows Vista, a Windows Update, a Microsoft Security Update, or a new version of Windows Internet Explorer in your environment.

Security Update Deployment

Affected Software

For information about the specific security update for your affected software, click the appropriate link:

Windows 2000 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue may be included in a future update rollup
Deployment
Installing without user intervention Windows2000-KB971468-x86-enu /quiet
Installing without restarting Windows2000-KB971468-x86-enu /norestart
Update log file KB971468.log
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable
Removal Information Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB971468$\Spuninst folder
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows 2000\SP5\KB971468\Filelist

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, visit the Microsoft TechNet Web site.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem Overwrites OEM files without prompting.
/nobackup Does not back up files needed for uninstall.
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.
/extract[:path] Extracts files without starting the Setup program.
/ER Enables extended error reporting.
/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.

Removing the Update

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start, and then click Search.
    2. In the Search Results pane, click All files and folders under Search Companion.
    3. In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
    4. In the list of files, right-click a file name from the appropriate file information table, and then click Properties.
      Note Depending on the edition of the operating system, or the programs that are installed on your system, some of the files that are listed in the file information table may not be installed.
    5. On the Version tab, determine the version of the file that is installed on your system by comparing it to the version that is documented in the appropriate file information table.
      Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation.
  • Registry Key Verification
    You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

    These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows XP (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For Windows XP Service Pack 2 and Windows XP Service Pack 3:\ WindowsXP-KB971468-x86-enu /quiet
For Windows XP Professional x64 Edition Service Pack 2:\ WindowsServer2003.WindowsXP-KB971468-x64-enu /quiet
Installing without restarting For Windows XP Service Pack 2 and Windows XP Service Pack 3:\ WindowsXP-KB971468-x86-enu /norestart
For Windows XP Professional x64 Edition Service Pack 2:\ WindowsServer2003.WindowsXP-KB971468-x64-enu /norestart
Update log file KB971468.log
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable
Removal Information Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%$NTUninstallKB971468$\Spuninst folder
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification For all supported 32-bit editions of Windows XP:\ HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP4\KB971468\Filelist
For all supported x64-based editions of Windows XP:\ HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP Version 2003\SP3\KB971468\Filelist

Note For supported versions of Windows XP Professional x64 Edition, this security update is the same as supported versions of the Windows Server 2003 x64 Edition security update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, visit the Microsoft TechNet Web site.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem Overwrites OEM files without prompting.
/nobackup Does not back up files needed for uninstall.
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.
/integrate:path Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
/extract[:path] Extracts files without starting the Setup program.
/ER Enables extended error reporting.
/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.

Removing the Update

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start, and then click Search.
    2. In the Search Results pane, click All files and folders under Search Companion.
    3. In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
    4. In the list of files, right-click a file name from the appropriate file information table, and then click Properties.
      Note Depending on the edition of the operating system, or the programs that are installed on your system, some of the files that are listed in the file information table may not be installed.
    5. On the Version tab, determine the version of the file that is installed on your system by comparing it to the version that is documented in the appropriate file information table.
      Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation.
  • Registry Key Verification
    You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

    These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Server 2003 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For all supported 32-bit editions of Windows Server 2003:\ WindowsServer2003-KB971468-x86-enu /quiet
For all supported x64-based editions of Windows Server 2003:\ WindowsServer2003.WindowsXP-KB971468-x64-enu /quiet
For all supported Itanium-based editions of Windows Server 2003:\ WindowsServer2003-KB971468-ia64-enu /quiet
Installing without restarting For all supported 32-bit editions of Windows Server 2003:\ WindowsServer2003-KB971468-x86-enu /norestart
For all supported x64-based editions of Windows Server 2003:\ WindowsServer2003.WindowsXP-KB971468-x64-enu /norestart
For all supported Itanium-based editions of Windows Server 2003:\ WindowsServer2003-KB971468-ia64-enu /norestart
Update log file KB971468.log
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching This security update does not support HotPatching. For more information about HotPatching, see Microsoft Knowledge Base Article 897341.
Removal Information Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%$NTUninstallKB971468$\Spuninst folder
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB971468\Filelist

Deployment Information

Installing the Update

When you install this security update, the installer checks to see if one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, visit the Microsoft TechNet Web site.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem Overwrites OEM files without prompting.
/nobackup Does not back up files needed for uninstall.
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.
/integrate:path Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
/extract[:path] Extracts files without starting the Setup program.
/ER Enables extended error reporting.
/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Note You can combine these switches into one command. For backward compatibility, the security update also supports many of the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.

Removing the Update

This security update supports the following setup switches.

Switch Description
/help Displays the command-line options.
Setup Modes
/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart Does not restart when installation has completed.
/forcerestart Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x] Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose Forces other programs to close when the computer shuts down.
/log:path Allows the redirection of installation log files.

Verifying that the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start, and then click Search.
    2. In the Search Results pane, click All files and folders under Search Companion.
    3. In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
    4. In the list of files, right-click a file name from the appropriate file information table, and then click Properties.
      Note Depending on the edition of the operating system, or the programs that are installed on your system, some of the files that are listed in the file information table may not be installed.
    5. On the Version tab, determine the version of the file that is installed on your system by comparing it to the version that is documented in the appropriate file information table.
      Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation.
  • Registry Key Verification
    You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

    These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For all supported 32-bit editions of Windows Vista:\ Windows6.0-KB971468-x86 /quiet
For all supported x64-based editions of Windows Vista:\ Windows6.0-KB971468-x64 /quiet
Installing without restarting For all supported 32-bit editions of Windows Vista:\ Windows6.0-KB971468-x86 /quiet /norestart
For all supported x64-based editions of Windows Vista:\ Windows6.0-KB971468-x64 /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
Switch Description
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start and then enter an update file name in Start Search.
    2. When the file appears under Programs, right-click on the file name and click Properties.
    3. Under the General tab, compare the file size with the file information tables provided in the bulletin KB article.
    4. You may also click on the Details tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article.
    5. Finally, you may also click on the Previous Versions tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file.

Windows Server 2008 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For all supported 32-bit editions of Windows Server 2008:\ Windows6.0-KB971468-x86 /quiet
For all supported x64-based editions of Windows Server 2008:\ Windows6.0-KB971468-x64 /quiet
For all supported Itanium-based editions of Windows Server 2008:\ Windows6.0-KB971468-ia64 /quiet
Installing without restarting For all supported 32-bit editions of Windows Server 2008:\ Windows6.0-KB971468-x86 /quiet /norestart
For all supported x64-based editions of Windows Server 2008:\ Windows6.0-KB971468-x64 /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008:\ Windows6.0-KB971468-ia64 /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches
Switch Description
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start and then enter an update file name in Start Search.
    2. When the file appears under Programs, right-click on the file name and click Properties.
    3. Under the General tab, compare the file size with the file information tables provided in the bulletin KB article.
    4. You may also click on the Details tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article.
    5. Finally, you may also click on the Previous Versions tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file.

Windows 7 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For all supported 32-bit editions of Windows 7:\ Windows6.1-KB971468-x86 /quiet
For all supported x64-based editions of Windows 7:\ Windows6.1-KB971468-x64 /quiet
Installing without restarting For all supported 32-bit editions of Windows 7:\ Windows6.1-KB971468-x86 /quiet /norestart
For all supported x64-based editions of Windows 7:\ Windows6.1-KB971468-x64 /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches

Switch Description
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start and then enter an update file name in Start Search.
    2. When the file appears under Programs, right-click on the file name and click Properties.
    3. Under the General tab, compare the file size with the file information tables provided in the bulletin KB article.
    4. You may also click on the Details tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article.
    5. Finally, you may also click on the Previous Versions tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file.

Windows Server 2008 R2 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention For all supported x64-based editions of Windows Server 2008 R2:\ Windows6.1-KB971468-x64 /quiet
For all supported Itanium-based editions of Windows Server 2008 R2:\ Windows6.1-KB971468-ia64 /quiet
Installing without restarting For all supported x64-based editions of Windows Server 2008 R2:\ Windows6.1-KB971468-x64 /quiet /norestart
For all supported Itanium-based editions of Windows Server 2008 R2:\ Windows6.1-KB971468-ia64 /quiet /norestart
Further information See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required? Yes, you must restart your system after you apply this security update.
HotPatching Not applicable.
Removal Information WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information See Microsoft Knowledge Base Article 971468
Registry Key Verification Note A registry key does not exist to validate the presence of this update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches

Switch Description
/?, /h, /help Displays help on supported switches.
/quiet Suppresses the display of status or error messages.
/norestart When combined with /quiet, the system will not be restarted after installation even if a restart is required to complete installation.

Note For more information about the wusa.exe installer, see Microsoft Knowledge Base Article 934307.

Verifying That the Update Has Been Applied

  • Microsoft Baseline Security Analyzer
    To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

  • File Version Verification
    Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

    1. Click Start and then enter an update file name in Start Search.
    2. When the file appears under Programs, right-click on the file name and click Properties.
    3. Under the General tab, compare the file size with the file information tables provided in the bulletin KB article.
    4. You may also click on the Details tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article.
    5. Finally, you may also click on the Previous Versions tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file.

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • Joshua Morin of Codenomicon for reporting the SMB Pathname Overflow Vulnerability (CVE-2010-0020)
  • Florian Rienhardt of BSI for reporting the SMB Memory Corruption Vulnerability (CVE-2010-0021)
  • Hernan Ochoa (Independent Information Security Consultant/Researcher) for reporting the SMB NTLM Authentication Lack of Entropy Vulnerability (CVE-2010-0231)

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (February 9, 2010): Bulletin published.
  • V1.1 (February 10, 2010): Corrected the FAQ for SMB Null Pointer Vulnerability - CVE-2010-0022 to reflect that the vulnerability was responsibly disclosed. Changed the Systems Management Server table entries for SMS 2003 with ITMU for Windows 7 and Windows Server 2008 R2. Corrected the verification registry key for all supported x64-based editions of Windows XP. These are informational changes only. There were no changes to the security update files or detection logic.

Built at 2014-04-18T13:49:36Z-07:00