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Windows: privilege elevation via AFD
Synthesis of the vulnerability
A local attacker can create an error in Ancillary Function Driver in order to execute code with system privileges.
Impacted products: Windows 2003, Windows 2008 R0, Windows 2008 R2, Windows 7, Windows Vista, Windows XP.
Creation date: 15/02/2012.
Identifiers: 2645640, BID-51930, BID-51936, CERTA-2012-AVI-075, CVE-2012-0148, CVE-2012-0149, MS12-009, VIGILANCE-VUL-11359.
Description of the vulnerability
The afd.sys (Ancillary Function Driver) driver is used to access to Winsock network features. The TDI (Transport Driver Interface) interface is used to communicate with AFD. It is impacted by two vulnerabilities on 64 bit computers.
TDI does not correctly check User Mode parameters given to the kernel via AfdPoll, which corrupts the memory. [severity:2/4; BID-51930, CVE-2012-0148]
TDI does not correctly check User Mode parameters given to the kernel, which corrupts the memory. [severity:2/4; BID-51936, CVE-2012-0149]
A local attacker can therefore create an error in Ancillary Function Driver in order to execute code with system privileges.
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