Windows Secure Channel Digital Signature Parsing Vulnerability - Secunia Advisories - Vulnerability Intelligence

Windows Secure Channel Digital Signature Parsing Vulnerability
Secunia Advisory:	SA25620	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-06-12
Last Update:	2007-06-15
Popularity:	12,747 views

Critical:	Highly critical
Impact:	DoS 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 Storage Server 2003 Microsoft Windows XP Home Edition Microsoft Windows XP Professional

Binary Analysis:	BA154 :: Available for 1 Credit BA158 :: Available for 1 Credit

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-2218

Description: A vulnerability has been reported in Microsoft Windows, which can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system. The vulnerability is caused due to an error within the Secure Channel (Schannel) security package when parsing digital signatures received from a server during the SSL handshake. This can be exploited to execute arbitrary code (Windows XP), cause the system to stop accepting SSL or TLS connections (Windows 2000), or cause the system to restart (Windows 2003) when a user e.g. visits a malicious website. NOTE: Windows 2000 and 2003 are not exploitable for arbitrary code execution. Solution: Apply patches. Windows 2000 SP4: http://www.microsoft.com/downloads/de...=5b8e728c-cb9f-4176-93a0-bf42d6387f93 Windows XP SP2: http://www.microsoft.com/downloads/de...=8615e6f3-415b-4c23-ba52-7eef70a11d77 Windows XP Professional x64 Edition (optionally with SP2): http://www.microsoft.com/downloads/de...=7e994340-c616-4f66-845b-7eaf095e968a Windows Server 2003 SP1/SP2: http://www.microsoft.com/downloads/de...=39e6c6d2-7e6f-4992-a731-36f44fe2d87f Windows Server 2003 x64 Edition (optionally with SP2): http://www.microsoft.com/downloads/de...=da424772-079c-4351-9759-8886e0f1ba79 Windows Server 2003 for Itanium-based systems (SP1/SP2): http://www.microsoft.com/downloads/de...=028592ff-2b69-472e-b186-bd2cc76bdfa4 Provided and/or discovered by: The vendor credits Thomas Lim, COSEINC. Changelog: 2007-06-15: Added link to US-CERT. Original Advisory: MS07-031 (KB935840): http://www.microsoft.com/technet/security/Bulletin/MS07-031.mspx Other References: US-CERT VU#810073: http://www.kb.cert.org/vuls/id/810073

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