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TITLE:
Microsoft Windows win32k.sys Driver Privilege Escalation
Vulnerabilities

SECUNIA ADVISORY ID:
SA43255

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43255/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43255

RELEASE DATE:
2011-02-11

DISCUSS ADVISORY:
http://secunia.com/advisories/43255/#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/43255/

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

https://ca.secunia.com/?page=viewadvisory&vuln_id=43255

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 gain escalated
privileges.

1) An error in the Win32k kernel-mode driver (win32k.sys) when
validating input passed from user mode can be exploited to execute
arbitrary code in kernel-mode.

2) An error in the Win32k kernel-mode driver (win32k.sys) when
validating input passed from user mode can be exploited to execute
arbitrary code in kernel-mode.

3) A validation error in the Win32k kernel-mode driver (win32k.sys)
when handling window class pointers can be exploited to execute
arbitrary code in kernel-mode.

4) A validation error in the Win32k kernel-mode driver (win32k.sys)
when handling window class pointers can be exploited to execute
arbitrary code in kernel-mode.

5) An error in the Win32k kernel-mode driver (win32k.sys) when
validating input passed from user mode can be exploited to corrupt
memory.

SOLUTION:
Apply patches.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Tarjei Mandt, Norman.

ORIGINAL ADVISORY:
MS11-012 (KB2479628)
http://www.microsoft.com/technet/security/bulletin/ms11-012.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:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

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


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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