The MHTML protocol handler in a component of Microsoft Outlook Express 5.5 SP2 and 6 through SP1, and Windows Mail, does not assign the correct Internet Explorer Security Zone to UNC share pathnames, which allows remote attackers to bypass intended access restrictions and read arbitrary files via an mhtml: URI in conjunction with a redirection, aka “URL Parsing Cross-Domain Information Disclosure Vulnerability.”
marc.info/?l=bugtraq&m=121915960406986&w=2
secunia.com/advisories/31415
www.coresecurity.com/content/internet-explorer-zone-elevation
www.securityfocus.com/archive/1/495458/100/0/threaded
www.securityfocus.com/bid/30585
www.securitytracker.com/id?1020679
www.securitytracker.com/id?1020680
www.us-cert.gov/cas/techalerts/TA08-225A.html
www.vupen.com/english/advisories/2008/2352
docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-048
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5886