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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2010-0261
Microsoft Windows Kernel-Mode Drivers Elevation of Privilege Vulnerability

Original Issue Date:December 15, 2010

Severity Rating: MEDIUM

Systems Affected

  • Microsoft Windows XP Service Pack 3
  • Microsoft Windows XP Professional x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 Service Pack 2
  • Microsoft Windows Server 2003 x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 SP2 (Itanium)
  • Microsoft Windows Vista Service Pack 1
  • Microsoft Windows Vista Service Pack 2
  • Microsoft Windows Vista x64 Edition Service Pack 1
  • Microsoft Windows Vista x64 Edition Service Pack 2
  • Microsoft Windows Server 2008 (32-bit)
  • Microsoft Windows Server 2008 (32-bit) Service Pack 2
  • Microsoft Windows Server 2008 (x64)
  • Microsoft Windows Server 2008 (x64) Service Pack 2
  • Microsoft Windows Server 2008 (Itanium)
  • Microsoft Windows Server 2008 (Itanium) Service Pack 2
  • Microsoft Windows 7 (32-bit)
  • Microsoft Windows 7 (x64)
  • Microsoft Windows Server 2008 R2 (x64)
  • Microsoft Windows Server 2008 R2 (Itanium)

Overview

Multiple vulnerabilities have been reported in Microsoft Windows, Successful exploitation of these vulnerability could allow local attackers to gain elevated privileges.

Description

The Windows kernel is the core of the operating system. It provides system-level services such as device management and memory management, allocates processor time to processes, and manages error handling.

Win32k.sys is a kernel-mode device driver and is the kernel part of the Windows subsystem. It contains the window manager, passes user messages to applications, graphics device interface (GDI), which is a library of functions for graphics output devices and also serves as a wrapper for DirectX support that is implemented in another driver (dxgkrnl.sys).

Win32k Buffer Overflow Vulnerability ( CVE-2010-3939   )

A memory allocation error vulnerability is reported in Microsoft Windows "win32k.sys" kernel-mode drivers due to improper allocation of  memory when copying data from user mode.

Win32k PFE Pointer Double Free Vulnerability ( CVE-2010-3940   )

A double free condition is a condition in which a program is caused to release or free allocated memory more than once. Releasing memory that has already been freed could lead to memory corruption.

A double-free error vulnerability is reported in Microsoft Windows "win32k.sys" driver when handling PFE objects. This vulnerability is caused by a "double free" condition involving a pointer to a kernel-mode drivers free objects that are no longer in use.



Win32k Double Free Vulnerability ( CVE-2010-3941   )

A double-free error vulnerability is reported in Microsoft Windows "win32k.sys" driver when running 16-bit programs. This vulnerability is caused by a "double free" condition involving a pointer to a kernel-mode drivers free objects that are no longer in use

Win32k WriteAV Vulnerability ( CVE-2010-3942   )

A memory allocation error vulnerability is reported in Microsoft Windows "win32k.sys" kernel-mode drivers due to improper allocation of  memory when copying data from user mode.

Win32k Cursor Linking Vulnerability ( CVE-2010-3943   )

A logical error vulnerability is reported in Microsoft Windows"win32k.sys" Kernel-mode drivers. The vulnerability is caused by a logic error that occurs when linking kernel-mode driver objects, leading to a corrupted linked list.

Win32k Memory Corruption Vulnerability ( CVE-2010-3944   )

An input validation vulnerability is reported in Microsoft Windows "win32k.sys" kernel-mode drivers due to improper validate input passed from user mode.

Successful exploitation of these vulnerabilities could allow remote attacker to run arbitrary code in kernel mode and can take complete control of the affected system in the context of logged in user.



Solution

Apply appropriate updates as mentioned in the Microsoft Security Bulletin MS10-098

Vendor Information

Microsoft
http://www.microsoft.com/technet/security/bulletin/ms10-098.mspx
http://support.microsoft.com/kb/294871

References

Microsoft
http://www.microsoft.com/technet/security/bulletin/ms10-098.mspx
http://support.microsoft.com/kb/294871

AUS-CERT
http://www.auscert.org.au/render.html?it=13725

Secunia
http://secunia.com/advisories/42612

SecurityTracker
http://securitytracker.com/alerts/2010/Dec/1024880.html

Vupen
http://www.vupen.com/english/advisories/2010/3220

CVE Name
CVE-2010-3939
CVE-2010-3940
CVE-2010-3941
CVE-2010-3942
CVE-2010-3943
CVE-2010-3944

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-24368572

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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