Description
The AhcVerifyAdminContext function in ahcache.sys in the Application Compatibility component in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not verify that an impersonation token is associated with an administrative account, which allows local users to gain privileges by running AppCompatCache.exe with a crafted DLL file, aka MSRC ID 20544 or "Microsoft Application Compatibility Infrastructure Elevation of Privilege Vulnerability."
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 1 module
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MS15-001 Microsoft Windows NtApphelpCacheControl Improper Authorization Check
exploit/windows/local/ntapphelpcachecontrol
Exploit-DB 1
- Microsoft Windows 8.1 (x86/x64) - 'ahcache.sys' NtApphelpCacheControl Privilege Escalation EDB-35661 · local · Jan 1, 2015 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- ms-appcompatcache-cve20150002-priv-esc(99523) vdb-entry
- https://code.google.com/p/google-security-research/issues/detail?id=118
- 71972 vdb-entry
- win-ms15kb3023266-update(99524) vdb-entry
- http://www.zdnet.com/article/google-discloses-unpatched-windows-vulnerability/
- MS15-001 vendor-advisory
- http://twitter.com/sambowne/statuses/550384131683520512
- 61277 third-party-advisory