Microsoft Web Proxy Auto-Discovery Feature Security Issue - Secunia Advisories - Vulnerability Intelligence

Microsoft Web Proxy Auto-Discovery Feature Security Issue
Secunia Advisory:	SA27901	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-12-04
Popularity:	14,274 views

Critical:	Less critical
Impact:	Security Bypass Exposure of sensitive information
Where:	From remote
Solution Status:	Vendor Workaround

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

Software:	Microsoft Internet Explorer 6.x Microsoft Internet Explorer 7.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-5355

Description: A security issue has been reported in Microsoft's Web Proxy Auto-Discovery (WPAD) feature, which can be exploited by malicious people to conduct man-in-the-middle (MITM) attacks. The problem is that the WPAD feature resolves "wpad" hostnames up to the second-level domain, which is potentially untrusted. This can be exploited to conduct man-in-the-middle attacks against third-level or deeper domains. Successful exploitation requires e.g. that the system has a primary DNS suffix configured (please see the vendor's advisory for details and other mitigating factors). Solution: The vendor has provided various workarounds. Please see the vendor's advisory for details. Provided and/or discovered by: The vendor credits Beau Butler. Original Advisory: Microsoft (KB945713): http://www.microsoft.com/technet/security/advisory/945713.mspx Extended Solution: The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.

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