what you don't know can hurt you

Secunia Security Advisory 42612

Secunia Security Advisory 42612
Posted Dec 25, 2010
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Multiple vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious, local users to gain escalated privileges.

tags | advisory, local, vulnerability
systems | windows
MD5 | 5f05819a5752eab7a4240d258b0aea82

Secunia Security Advisory 42612

Change Mirror Download
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TITLE:
Microsoft Windows win32k.sys Driver Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA42612

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42612/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42612

RELEASE DATE:
2010-12-24

DISCUSS ADVISORY:
http://secunia.com/advisories/42612/#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/42612/

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=42612

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:
Multiple vulnerabilities have been reported in Microsoft Windows,
which can be exploited by malicious, local users to gain escalated
privileges.

1) A memory allocation error in the "win32k.sys" driver when copying
data from user mode can be exploited to execute code in the kernel.

2) A double-free error in the "win32k.sys" driver when handling PFE
objects can be exploited to execute code in the kernel.

3) A second double-free error in the "win32k.sys" driver when running
16-bit programs can be exploited to execute code in the kernel.

4) A memory allocation error in the "win32k.sys" driver when copying
data from user mode can be exploited to execute code in the kernel.

5) A logic error in the "win32k.sys" driver when linking driver
object may lead to a corrupted linked list.

6) An input validation error in the "xxxRealDefWindowProc()" function
(win32k.sys) when processing the WM_GETTEXT window message can be
exploited to write a NULL byte to an arbitrary memory location.

SOLUTION:
Apply patches.

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

PROVIDED AND/OR DISCOVERED BY:
6) Stéfan Le Berre, Sysdream.

The vendor also credits:
3 - 5) Tarjei Mandt, Norman
6) Tarjei Mandt, Norman.

ORIGINAL ADVISORY:
MS10-098
http://www.microsoft.com/technet/security/bulletin/ms10-098.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/

----------------------------------------------------------------------

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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