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                                   CERT-Renater

                        Note d'Information No. 2011/VULN099
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DATE                      : 09/02/2011

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Windows XP, Windows Server 2003,
                             Windows Vista, Windows Server 2008, Windows 7.

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KB2479628
http://www.microsoft.com/technet/security/Bulletin/MS11-012.mspx
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Microsoft Security Bulletin MS11-012 - Important
Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of
Privilege (2479628)

Published: February 08, 2011

Version: 1.0

General Information

Executive Summary

This security update resolves five privately reported vulnerabilities in
Microsoft Windows. The vulnerabilities could allow elevation of privilege if
an attacker logged on locally and ran a specially crafted application. An
attacker must have valid logon credentials and be able to log on locally to
exploit these vulnerabilities. The vulnerabilities could not be exploited
remotely or by anonymous users.

This security update is rated Important for all supported versions of Microsoft
Windows. For more information, see the subsection, Affected and Non-Affected
Software, in this section.

The security update addresses the vulnerabilities by correcting the way the
Windows kernel-mode drivers validate input passed from user mode.

Affected Software

Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service
  Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
  Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
  x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for
  Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information

Win32k Improper User Input Validation Vulnerability - CVE-2011-0086

An elevation of privilege vulnerability exists in the way that Windows
kernel-mode drivers validate data supplied from user mode to kernel mode. An
attacker who successfully exploited this vulnerability could run arbitrary
code in kernel mode and take complete control of an affected system. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full administrative rights.

Win32k Insufficient User Input Validation Vulnerability - CVE-2011-0087

An elevation of privilege vulnerability exists in the way that Windows
kernel-mode drivers validate data supplied from user mode to kernel mode. An
attacker who successfully exploited this vulnerability could run arbitrary
code in kernel mode and take complete control of an affected system. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full administrative rights.

Win32k Window Class Pointer Confusion Vulnerability - CVE-2011-0088

An elevation of privilege vulnerability exists in the way that Windows
kernel-mode drivers validate data supplied from user mode to kernel mode. An
attacker who successfully exploited this vulnerability could run arbitrary
code in kernel mode and take complete control of an affected system. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full administrative rights.

Win32k Window Class Improper Pointer Validation Vulnerability - CVE-2011-0089

An elevation of privilege vulnerability exists in the way that Windows
kernel-mode drivers validate data supplied from user mode to kernel mode. An
attacker who successfully exploited this vulnerability could run arbitrary
code in kernel mode and take complete control of an affected system. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full administrative rights.

Win32k Memory Corruption Vulnerability - CVE-2011-0090

An elevation of privilege vulnerability exists in the way that Windows
kernel-mode drivers validate data supplied from user mode to kernel mode. An
attacker who successfully exploited this vulnerability could run arbitrary
code in kernel mode and take complete control of an affected system. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full administrative right


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