Microsoft Security Bulletin MS15-130 - Critical
Security Update for Microsoft Uniscribe to Address Remote Code Execution (3108670)
Published: December 8, 2015
Version: 1.0
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user opens a specially crafted document or visits an untrusted webpage that contains specially crafted fonts.
This security update is rated Critical for all supported editions of Windows 7 and Windows Server 2008 R2. For more information, see the Affected Software section.
The security update addresses the vulnerability by correcting how Windows parses fonts. For more information about the vulnerability, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3108670.
Affected Software and Vulnerability Severity Ratings
The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.
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 December bulletin summary.
| Vulnerability Severity Rating and Maximum Security Impact by Affected Software | ||
|---|---|---|
| Operating System | Windows Integer Underflow Vulnerability - CVE-2015-6130 | Updates Replaced* |
| Windows 7 | ||
| Windows 7 for 32-bit Systems Service Pack 1 (3108670) | Critical Remote Code Execution | 2957509 in MS14-036 |
| Windows 7 for x64-based Systems Service Pack 1 (3108670) | Critical Remote Code Execution | 2957509 in MS14-036 |
| Windows Server 2008 R2 | ||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 \ (3108670) | Critical Remote Code Execution | 2957509 in MS14-036 |
| Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 \ (3108670) | Critical Remote Code Execution | 2957509 in MS14-036 |
| Server Core installation option | ||
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) \ (3108670) | Critical Remote Code Execution | 2957509 in MS14-036 |
*The Updates Replaced column shows only the latest update in any chain of superseded updates. For a comprehensive list of updates replaced, go to the Microsoft Update Catalog, search for the update KB number, and then view update details (updates replaced information is provided on the Package Details tab).
Vulnerability Information
Windows Integer Underflow Vulnerability - CVE-2015-6130
A remote code execution vulnerability exists when Windows Uniscribe improperly parses specially crafted fonts. An attacker who successfully exploited the vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights.
There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage that contains embedded fonts. The security update addresses the vulnerability by correcting how Windows parses fonts.
Microsoft received information about this vulnerability through coordinated vulnerability disclosure. At the time this security bulletin was originally issued, Microsoft was unaware of any attack attempting to exploit the vulnerability.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Security Update Deployment
For Security Update Deployment information, see the Microsoft Knowledge Base article referenced here in the Executive Summary.
Acknowledgments
Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgments for more information.
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 (December 8, 2015): Bulletin published.
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