Windows 2003 Server Buffer Overflow Protection Mechanism Bypass - Secunia Advisories - Vulnerability Intelligence

Windows 2003 Server Buffer Overflow Protection Mechanism Bypass
Secunia Advisory:	SA9720	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2003-09-12
Popularity:	14,007 views

Critical:	Less critical
Impact:	Security Bypass
Where:	From remote
Solution Status:	Unpatched

OS:	Microsoft Windows Server 2003 Datacenter Edition Microsoft Windows Server 2003 Enterprise Edition Microsoft Windows Server 2003 Standard Edition Microsoft Windows Server 2003 Web Edition

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Description: A security issue has been identified in Windows 2003 Server, which can be exploited to bypass the security mechanism included for detecting and protecting against exploitation of stack based buffer overflows. The problem is that it is possible to cause stack based buffer overflows without overwriting the canary or cookie placed on the stack to detect possible exploitation. See the original paper for a detailed description. Solution: Don't rely solely on the protection mechanism to prevent exploitation of stack based buffer overflows. Make sure that systems are patched or apply workarounds when new vulnerabilities are reported and follow best security practises to lessen impact and threat. Provided and/or discovered by: David Litchfield, NGSSoftware. Original Advisory: http://www.nextgenss.com/papers/defeating-w2k3-stack-protection.pdf Other References: Microsoft Best Practises and Recommendations: http://www.microsoft.com/technet/security/bestprac/default.asp

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