FYI...
Microsoft Security Advisory (945713)
Vulnerability in Web Proxy Auto-Discovery (WPAD) Could Allow Information Disclosure
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http://www.microsoft...ory/945713.mspx
December 3, 2007 - "Microsoft is investigating new public reports of a vulnerability in the way Windows resolves hostnames that do not include a fully-qualified domain name (FQDN). The technology that the vulnerability affects is Web Proxy Auto-Discovery (WPAD). Microsoft has not received any information to indicate that this vulnerability has been publicly used to attack customers, and Microsoft is not aware of any customer impact at this time. Microsoft is aggressively investigating the public reports. Customers whose domain name begins in a third-level or deeper domain, such as “contoso.co.us”, or for whom the following mitigating factors do not apply, are at risk from this vulnerability. Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers...
Mitigating Factors:
• Customers who do not have a primary DNS suffix configured on their system are not affected by this vulnerability. In most cases, home users that are not members of a domain have no primary DNS suffix configured. Connection-specific DNS suffixes may be provided by some Internet Service Providers (ISPs), and these configurations are not affected by this vulnerability.
• Customers whose DNS domain name is registered as a second-level domain (SLD) below a top-level domain (TLD) are not affected by this vulnerability. Customers whose DNS suffixes reflect this registration would not be affected by this vulnerability. An example of a customer who is not affected is contoso.com or fabrikam.gov, where “contoso” and “fabrikam” are customer registered SLDs under their respective “.com” and “.gov” TLDs.
• Customers who have specified a proxy server via DHCP server settings or DNS are not affected by this vulnerability.
• Customers who have a trusted WPAD server in their organization are not affected by this vulnerability. (See the Workaround section for specific steps in creating a WPAD.DAT file on a WPAD server.)
• Customers who have manually specified a proxy server in Internet Explorer are not at risk from this vulnerability when using Internet Explorer.
• Customers who have disabled 'Automatically Detect Settings' in Internet Explorer are not at risk from this vulnerability when using Internet Explorer..."
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http://secunia.com/advisories/27901/
"...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..."
Edited by AplusWebMaster, 04 December 2007 - 06:56 AM.