exploit the possibilities

Microsoft Windows 8.1 Ahcache.sys/NtApphelpCacheControl Privilege Escalation

Microsoft Windows 8.1 Ahcache.sys/NtApphelpCacheControl Privilege Escalation
Posted Nov 17, 2015
Authored by Google Security Research, forshaw

On Windows 8.1 Update 32/64 bit, the system call NtApphelpCacheControl (the code is actually in ahcache.sys) allows application compatibility data to be cached for quick reuse when new processes are created. A normal user can query the cache but cannot add new cached entries as the operation is restricted to administrators. This is checked in the function AhcVerifyAdminContext. This function has a vulnerability where it doesn't correctly check the impersonation token of the caller to determine if the user is an administrator. It reads the caller's impersonation token using PsReferenceImpersonationToken and then does a comparison between the user SID in the token to LocalSystem's SID. It doesn't check the impersonation level of the token so it's possible to get an identify token on your thread from a local system process and bypass this check.

tags | exploit, local
systems | linux, windows
advisories | CVE-2015-0001
MD5 | 60f7d8c70155b2b1c5f188a27a78d2f2
Login or Register to add favorites

File Archive:

August 2021

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Aug 1st
    1 Files
  • 2
    Aug 2nd
    7 Files
  • 3
    Aug 3rd
    0 Files
  • 4
    Aug 4th
    0 Files
  • 5
    Aug 5th
    0 Files
  • 6
    Aug 6th
    0 Files
  • 7
    Aug 7th
    0 Files
  • 8
    Aug 8th
    0 Files
  • 9
    Aug 9th
    0 Files
  • 10
    Aug 10th
    0 Files
  • 11
    Aug 11th
    0 Files
  • 12
    Aug 12th
    0 Files
  • 13
    Aug 13th
    0 Files
  • 14
    Aug 14th
    0 Files
  • 15
    Aug 15th
    0 Files
  • 16
    Aug 16th
    0 Files
  • 17
    Aug 17th
    0 Files
  • 18
    Aug 18th
    0 Files
  • 19
    Aug 19th
    0 Files
  • 20
    Aug 20th
    0 Files
  • 21
    Aug 21st
    0 Files
  • 22
    Aug 22nd
    0 Files
  • 23
    Aug 23rd
    0 Files
  • 24
    Aug 24th
    0 Files
  • 25
    Aug 25th
    0 Files
  • 26
    Aug 26th
    0 Files
  • 27
    Aug 27th
    0 Files
  • 28
    Aug 28th
    0 Files
  • 29
    Aug 29th
    0 Files
  • 30
    Aug 30th
    0 Files
  • 31
    Aug 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close