BSOD in Win 2k3, Vista x86 and x64 by nonpriviledged user

2008.11.13

Credit: support killprog com

Risk: Low

Local: Yes

Remote: No

CVE: CVE-2008-5044

CWE: CWE-362

CVSS Base Score: 4/10

Impact Subscore: 6.9/10

Exploitability Subscore: 1.9/10

Exploit range: Local

Attack complexity: High

Authentication: No required

Confidentiality impact: None

Integrity impact: None

Availability impact: Complete

BSOD or hard system hang due to race condition in win32k. sys code that processes UnhookWindowsHookEx. Reproduced when thread calls many times UnhookWindowsHookEx in the same time with switching active windows desktop object (SwitchDesktop) from desktop where hooks are unhooked and broadcasting windows messages to windows on that desktop. Sample exploit code can be downloaded from: http://killprog.com/whk.zip Works on Win'2k3 and Vista. XP seems to be immune to this.

References:

http://www.securityfocus.com/bid/32206

http://www.securityfocus.com/archive/1/archive/1/498165/100/0/threaded

http://killprog.com/whk.zip

See this note in RAW Version

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BSOD in Win 2k3, Vista x86 and x64 by nonpriviledged user

References:

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