Microsoft Windows CSRSS MsgBox Memory Corruption Vulnerability - Advisories

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Microsoft Windows CSRSS MsgBox Memory Corruption Vulnerability

Secunia Advisory:	SA23448
Release Date:	2006-12-22
Last Update:	2007-04-10

Critical:	Highly critical
Impact:	System access
Where:	From remote
Solution Status:	Vendor Patch

OS:	Microsoft Windows 2000 Advanced Server Microsoft Windows 2000 Datacenter Server Microsoft Windows 2000 Professional Microsoft Windows 2000 Server Microsoft Windows Server 2003 Datacenter Edition Microsoft Windows Server 2003 Enterprise Edition Microsoft Windows Server 2003 Standard Edition Microsoft Windows Server 2003 Web Edition Microsoft Windows Vista Microsoft Windows XP Home Edition Microsoft Windows XP Professional


CVE reference:	CVE-2006-6696 (Secunia mirror)

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Description: A vulnerability has been reported in Microsoft Windows, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to a double-free error in the Client/Server Run-time Subsystem (CSRSS) within WINSRV.DLL when handling HardError messages. Successful exploitation allows execution of arbitrary code when a user e.g. visits a malicious website. NOTE: Various other unspecified vulnerabilities discovered internally by Microsoft have also been reported. Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector. Solution: Apply patches. Windows 2000 (requires SP4): http://www.microsoft.com/downloads/de...=909e3b63-4d11-4fe6-849f-1ce960eb62cd Windows XP (requires SP2): http://www.microsoft.com/downloads/de...=69876449-25d1-41b4-b7c8-2b7fb40e59ee Windows XP Professional x64 Edition (optionally with SP2): http://www.microsoft.com/downloads/de...=91fd8716-c1a2-434e-bed0-df9d01e3d685 Windows Server 2003 (optionally with SP1/SP2): http://www.microsoft.com/downloads/de...=4dac667d-b346-461e-8bb5-6112e946349f Windows Server 2003 for Itanium-based systems (optionally with SP1/SP2): http://www.microsoft.com/downloads/de...=639de6c7-0928-469a-be68-60ea391fa770 Windows Server 2003 x64 Edition (optionally with SP2): http://www.microsoft.com/downloads/de...=69dbe4bc-05a5-450b-8c72-e431e800d4f3 Windows Vista: http://www.microsoft.com/downloads/de...=3487b1f0-a383-41a4-a660-2768962b3bcd Windows Vista x64 Edition: http://www.microsoft.com/downloads/de...=c46f62e1-dddd-4886-a82b-ebec258a495b Provided and/or discovered by: Independently discovered by: * NULL * Tim Garnett, Determina Security Research. Changelog: 2006-12-22: Added CVE reference. 2006-12-29: Added Windows Vista as affected product. 2007-04-10: Updated "Solution" section. Added additional information from Microsoft. Original Advisory: MS07-021 (KB930178): http://www.microsoft.com/technet/security/Bulletin/MS07-021.mspx Microsoft: http://blogs.technet.com/msrc/archive...eport-of-a-windows-vulnerability.aspx Full-Disclosure: http://lists.grok.org.uk/pipermail/full-disclosure/2006-December/051394.html Determina Security Research: http://www.determina.com/security.research/vulnerabilities/csrss-harderror.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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