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AUSCERT External Security Bulletin Redistribution
ESB-2015.0083
Vulnerability in Windows Application Compatibility Cache
Could Allow Elevation of Privilege (3023266)
14 January 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows 7
Windows 8
Windows 8.1
Windows RT
Windows RT 8.1
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0002
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS15-001
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Microsoft Security Bulletin MS15-001 - Important
Vulnerability in Windows Application Compatibility Cache Could Allow Elevation
of Privilege (3023266)
Published: January 13, 2015
Version: 1.0
Executive Summary
This security update resolves a publicly disclosed vulnerability in Microsoft
Windows. The vulnerability could allow elevation of privilege if an attacker
logs on to a system and runs a specially crafted application. An authenticated
attacker who successfully exploited this vulnerability could bypass existing
permission checks that are performed during cache modification in the
Microsoft Windows Application Compatibility component and execute arbitrary
code with elevated privileges.
This security update is rated Important for all supported editions of Windows
7, Windows Server 2008 R2, Windows 8, Windows Server 2012, Windows RT, Windows
8.1, Windows Server 2012 R2, and Windows RT 8.1.
Affected Software
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Windows 8 for 32-bit Systems Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
Windows Server 2012
Windows Server 2012 R2
Windows RT [1]
Windows RT 8.1 [1]
Windows Server 2008 R2 for x64-based Systems
Service Pack 1 (Server Core installation)
Windows Server 2012 (Server Core installation) Windows Server 2012 R2 (Server
Core installation)
[1] This update is available via Windows Update only.
Vulnerability Information
Microsoft Application Compatibility Infrastructure Elevation of Privilege
Vulnerability - CVE-2015-0002
An elevation of privilege vulnerability exists in how the Microsoft Windows
Application Compatibility Infrastructure (AppCompat) improperly checks the
authorization of the caller's impersonation token. An attacker could attempt
to exploit this to run a privileged application. The update addresses the
vulnerability by implementing proper authorization checking of impersonation
token usage.
This vulnerability has been publicly disclosed. It has been assigned Common
Vulnerability and Exposure number CVE-2015-0002. When this security bulletin
was issued, Microsoft was not aware of attacks that attempt to exploit this
vulnerability.
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