Microsoft Web Proxy Auto-Discovery Name Server Resolution Bug Lets Remote Users Conduct Man-in-the-Middle Attacks
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SecurityTracker Alert ID: 1019033
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SecurityTracker URL: http://securitytracker.com/id?1019033
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CVE Reference: CVE-2007-5355
(Links to External Site)
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Date: Dec 3 2007
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Impact: Disclosure of system information, Disclosure of user information
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Exploit Included: Yes
Vendor Confirmed: Yes
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Advisory: Microsoft Security Advisory
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Version(s): 2000 SP4, 2003 SP2, XP SP2, Vista; and prior service packs
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Description: A vulnerability was reported in the Microsoft Web Proxy Auto-Discovery feature. A remote user may be able to conduct man-in-the-middle attacks.
The feature incorrectly resolves domain names to locate a Web Proxy Auto-Discover (WPAD) server. A remote user can host a WPAD server
and cause the WPAD client to use the remote user's WPAD server as a proxy server. This may allow man-in-the-middle attacks.
Target
users with 3rd level or deeper domain names are affected.
The WPAD client may resolve to "wpad.[2nd level domain].[top level
domain]", which would be located outside of the target user's 3rd level domain.
Beau Butler reported this vulnerability.
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Impact: A remote user may be able to conduct man-in-the-middle attacks.
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Solution: No solution was available at the time of this entry.
Microsoft has described some workarounds in their advisory.
The Microsoft advisory is available at:
http://www.microsoft.com/technet/security/advisory/945713.mspx
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Vendor URL: www.microsoft.com/technet/security/advisory/945713.mspx (Links to External Site)
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Cause: Access control error, State error
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Underlying OS: Windows (2000), Windows (2003), Windows (Vista), Windows (XP)
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Message History:
None.
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Source Message Contents
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Date: Mon, 3 Dec 2007 17:21:24 -0500
Subject: Vulnerability in Web Proxy Auto-Discovery (WPAD) Could Allow Information Disclosure
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http://www.microsoft.com/technet/security/advisory/945713.mspx
CVE-2007-5355
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