The default configuration of Microsoft Windows uses the Web Proxy Autodiscovery Protocol (WPAD) without static WPAD entries, which might allow remote attackers to intercept web traffic by registering a proxy server using WINS or DNS, then responding to WPAD requests, as demonstrated using Internet Explorer. NOTE: it could be argued that if an attacker already has control over WINS/DNS, then web traffic could already be intercepted by modifying WINS or DNS records, so this would not cross privilege boundaries and would not be a vulnerability. It has also been reported that DHCP is an alternate attack vector.
archives.neohapsis.com/archives/isn/2007-q1/0418.html
isc.sans.org/diary.html?storyid=2517
news.com.com/Windows+weakness+can+lead+to+network+traffic+hijacks/2100-1002_3-6170229.html
support.microsoft.com/kb/934864
www.vupen.com/english/advisories/2007/1115
exchange.xforce.ibmcloud.com/vulnerabilities/33244