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TITLE:
Windows Vista CSRSS Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA24823

VERIFY ADVISORY:
http://secunia.com/advisories/24823/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Microsoft Windows Vista
http://secunia.com/product/13223/

DESCRIPTION:
eEye Digital Security has reported a vulnerability in Windows Vista,
which can be exploited by malicious, local users to gain escalated
privileges.

The vulnerability is caused due to incorrect marshaling of system
resources in the Client/Server Run-time Subsystem (CSRSS) when
handling connections during the startup and stopping of processes.
This can be exploited to execute arbitrary code with SYSTEM
privileges by establishing and closing multiple connections to the
subsystem's "ApiPort".

SOLUTION:
Apply patches.

Windows Vista:
http://www.microsoft.com/downloads/details.aspx?FamilyId=3487b1f0-a383-41a4-a660-2768962b3bcd

Windows Vista x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=c46f62e1-dddd-4886-a82b-ebec258a495b

PROVIDED AND/OR DISCOVERED BY:
Derek Soeder, eEye Digital Security.

ORIGINAL ADVISORY:
MS07-021 (KB930178):
http://www.microsoft.com/technet/security/Bulletin/MS07-021.mspx

eEye Digital Security:
http://research.eeye.com/html/advisories/published/AD20070410b.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


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