Microsoft Windows Kernel 'Win32k.sys' (CVE-2011-1234) Local Privilege Escalation Vulnerability

Bugtraq ID:	47234
Class:	Failure to Handle Exceptional Conditions
CVE:	CVE-2011-0673
Remote:	No
Local:	Yes
Published:	Apr 12 2011 12:00AM
Updated:	Apr 14 2011 04:24PM
Credit:	Tarjei Mandt of Norman
Vulnerable:	Microsoft Windows XP Tablet PC Edition SP3 Microsoft Windows XP Tablet PC Edition SP2 Microsoft Windows XP Tablet PC Edition SP1 Microsoft Windows XP Tablet PC Edition Microsoft Windows XP Service Pack 3 0 Microsoft Windows XP Media Center Edition 2005 SP3 Microsoft Windows XP Media Center Edition SP3 Microsoft Windows XP Media Center Edition SP2 Microsoft Windows XP Media Center Edition SP1 Microsoft Windows XP Media Center Edition Microsoft Windows XP Home SP3 Microsoft Windows XP Home SP2 Microsoft Windows XP Home SP1 Microsoft Windows XP Home Microsoft Windows XP Embedded SP3 Microsoft Windows XP Embedded SP2 Microsoft Windows XP Embedded SP1 Microsoft Windows XP Embedded Microsoft Windows XP 0 Microsoft Windows XP 0 Avaya Messaging Application Server 5 Avaya Messaging Application Server 4 Avaya Meeting Exchange - Webportal 0 Avaya Meeting Exchange - Web Conferencing Server 0 Avaya Meeting Exchange - Streaming Server 0 Avaya Meeting Exchange - Recording Server 0 Avaya Meeting Exchange - Client Registration Server 0 Avaya Meeting Exchange 5.0 .0.52 Avaya Meeting Exchange 5.2 SP2 Avaya Meeting Exchange 5.2 SP1 Avaya Meeting Exchange 5.2 Avaya Meeting Exchange 5.1 SP1 Avaya Meeting Exchange 5.1 Avaya Meeting Exchange 5.0 SP2 Avaya Meeting Exchange 5.0 SP1 Avaya Meeting Exchange 5.0 Avaya Communication Server 1000 Telephony Manager 4.0 Avaya Communication Server 1000 Telephony Manager 3.0 Avaya CallPilot 5.0 Avaya CallPilot 4.0 Avaya Aura Conferencing 6.0 Standard Avaya Aura Conferencing 6.0 SP1 Standard
Not Vulnerable:

Microsoft Windows Kernel 'Win32k.sys' (CVE-2011-1234) Local Privilege Escalation Vulnerability

Microsoft Windows is prone to a local privilege-escalation vulnerability that occurs in the Windows kernel due to a NULL-pointer dereference.

A local attacker can exploit this issue to execute arbitrary code with kernel-level privileges. Successful exploits will result in the complete compromise of affected computers. Failed exploit attempts may cause a denial-of-service condition.

Microsoft Windows Kernel 'Win32k.sys' (CVE-2011-1234) Local Privilege Escalation Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Microsoft Windows Kernel 'Win32k.sys' (CVE-2011-1234) Local Privilege Escalation Vulnerability

Solution:
Vendor updates are available. Please see the referenced advisory for more information.


Microsoft Windows XP Media Center Edition SP3

• Microsoft WindowsXP-KB2506223-x86-ENU.exe
  http://www.microsoft.com/downloads/details.aspx?familyid=39E55BBF-C1C5 -4696-BFE7-632E997CD98E

Microsoft Windows XP Home SP3

• Microsoft WindowsXP-KB2506223-x86-ENU.exe
  http://www.microsoft.com/downloads/details.aspx?familyid=39E55BBF-C1C5 -4696-BFE7-632E997CD98E

Microsoft Windows XP Tablet PC Edition SP3

• Microsoft WindowsXP-KB2506223-x86-ENU.exe
  http://www.microsoft.com/downloads/details.aspx?familyid=39E55BBF-C1C5 -4696-BFE7-632E997CD98E

Microsoft Windows Kernel 'Win32k.sys' (CVE-2011-1234) Local Privilege Escalation Vulnerability

References:

• Microsoft Windows Homepage (Microsoft )
  
• ASA-2011-110 MS11-034 Vulnerabilities in Windows Kernel-Mode Drivers Could Allow (Avaya)
  
• Microsoft Security Bulletin MS11-034 (Microsoft)