CVE-2015-0001
Microsoft Windows 8.1 Ahcache.sys/NtApphelpCacheControl Privilege Escalation
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The Windows Error Reporting (WER) component in Microsoft Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows local users to bypass the Protected Process Light protection mechanism and read the contents of arbitrary process-memory locations by leveraging administrative privileges, aka "Windows Error Reporting Security Feature Bypass Vulnerability."
El componente Windows Error Reporting (WER) en Microsoft Windows 8, Windows 8.1, Windows Server 2012 Gold y R2, y Windows RT Gold y 8.1 permite a usuarios locales evadir el mecanismo de protección Protected Process Light y leer el contenido de localizaciones de la memoria de procesos arbitrarias mediante el aprovechamiento de privilegios de administración, también conocido como 'vulnerabilidad de la evasión de la caracteristica de seguridad de los informes sobre errores de Windows.'
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2014-11-18 CVE Reserved
- 2015-01-13 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-06 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-264: Permissions, Privileges, and Access Controls
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| http://packetstormsecurity.com/files/134392/Microsoft-Windows-8.1-Ahcache.sys-NtApphelpCacheControl-Privilege-Escalation.html | X_refsource_misc |
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| http://secunia.com/advisories/62134 | Third Party Advisory | |
| http://www.securityfocus.com/bid/71927 | Vdb Entry | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/99513 | Vdb Entry | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/99514 | Vdb Entry |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-006 | 2018-10-12 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Microsoft Search vendor "Microsoft" | Windows 8 Search vendor "Microsoft" for product "Windows 8" | - | - |
Affected
| ||||||
| Microsoft Search vendor "Microsoft" | Windows 8.1 Search vendor "Microsoft" for product "Windows 8.1" | - | - |
Affected
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| Microsoft Search vendor "Microsoft" | Windows Rt Search vendor "Microsoft" for product "Windows Rt" | - | gold |
Affected
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| Microsoft Search vendor "Microsoft" | Windows Rt 8.1 Search vendor "Microsoft" for product "Windows Rt 8.1" | - | - |
Affected
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| Microsoft Search vendor "Microsoft" | Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012" | - | gold |
Affected
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| Microsoft Search vendor "Microsoft" | Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012" | r2 Search vendor "Microsoft" for product "Windows Server 2012" and version "r2" | x64 |
Affected
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