Microsoft Windows Ancillary Function Driver privilege escalation

ms-ancillary-function-priv-esc (72840)

High Risk

Description:

The Microsoft Windows Ancillary Function Driver (afd.sys) could allow a local attacker to gain elevated privileges on the system, caused by improper validation of input passed from user mode to the kernel. By executing a malicious application on the vulnerable system, a local attacker with valid login credentials could exploit this vulnerability to execute arbitrary code on the system with elevated privileges.

*CVSS:

Base Score:	7.2
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Complete
Integrity Impact:	Complete
Availability Impact:	Complete
Temporal Score:	5.3
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Privileges

Remedy:

Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS12-009. See References.

References:

• Microsoft Security Bulletin MS12-009: Vulnerabilities in Ancillary Function Driver Could Allow Elevation of Privilege (2645640).
• BID-51936: Microsoft Windows Ancillary Function Driver CVE-2012-0149 Local Privilege Escalation Vulnerability
• CVE-2012-0149: afd.sys in the Ancillary Function Driver in Microsoft Windows Server 2003 SP2 does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka Ancillary Function Driver Elevation of Privilege Vulnerability.
• SA47911: Windows Ancillary Function Driver Two Privilege Escalation Vulnerabilities

Platforms Affected:

• Microsoft Windows Server 2003 SP2
• Microsoft Windows Server 2003 SP2 x64
• Microsoft Windows Server 2003 SP2 Itanium

Reported:

Feb 14, 2012

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