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TITLE:
Microsoft Windows win32k.sys Driver Denial of Service and Privilege
Escalation

SECUNIA ADVISORY ID:
SA40878

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40878/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40878

RELEASE DATE:
2010-08-10

DISCUSS ADVISORY:
http://secunia.com/advisories/40878/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40878/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
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 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=40878

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Some vulnerabilities have been reported in Microsoft Windows, which
can be exploited by malicious, local users to cause a DoS (Denial of
Service) or gain escalated privileges.

1) Improper validation of an argument passed to a system call in
win32k.sys can be exploited to cause a vulnerable system to become
unresponsive and restart.

2) An error in the exception handling in win32k.sys can be exploited
to execute arbitrary code in kernel-mode.

3) Memory is not properly allocated by win32k.sys when copying data
from user mode, which can be exploited to cause a pool overflow and
execute arbitrary code in kernel-mode.

4) Improper validation of input passed from user mode in win32k.sys
can be exploited to execute arbitrary code in kernel-mode.

5) Pseudo handles in callback parameters when creating a new window
are not properly validated by win32k.sys, which can be exploited to
execute arbitrary code in kernel-mode.

SOLUTION:
Apply patches.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Tavis Ormandy, Google.
2) Reported by the vendor.
3,4) The vendor credits Matthieu Suiche, MoonSols.
5) The vendor credits Nicolas Economou, Core Security Technologies.

ORIGINAL ADVISORY:
MS10-048 (KB2160329):
http://www.microsoft.com/technet/security/Bulletin/MS10-048.mspx

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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