[ Wintercore Advisory ]
Realtek HD Audio Codec Drivers (Vista) - Local Privilege Escalation
:: Non-Technical Description
Realtek HD Audio Codec Drivers are prone to a local privilege escalation
due to insufficient validation of user-mode buffers. Successful
exploitation grants SYSTEM privileges to authenticated users, no special
privileges are required to exploit the flaw.
A malicious attacker can take advantage of these flaws to elevate
privileges in the following forms:
1. Creating, reading or writing arbitrary registry keys.
2. Overwriting arbitrary kernel addresses.
:: Files affected
RTKVHDA.sys < 6.0.1.5605 (32-bit) Windows Vista
RTKVHDA64.sys (signed) < 6.0.1.5605 (64-bit) Windows Vista
:: Credits
Vulnerability discovered and researched by Ruben Santamarta.
:: Disclosure Timeline
04/02/2008 - Realtek contacted
04/23/2008 - Flaw fixed. Public Disclosure.
:: Technical details - Original Advisory
http://www.wintercore.com/advisories/advisory_W010408.html
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