Signature Detail

POP3: MHTML Hyperlink Cross Domain Information Disclosure

This signature detects e-mails with mhtml: hyperlinks. Windows Mail and Outlook Express are vulnerable and can allow an attacker access to information stored in cookies from other domains including: usernames, passwords, social security numbers, credit card numbers, and other sensitive data.

Extended Description

Outlook Express and Windows Mail are prone to a cross-domain information-disclosure vulnerability. This vulnerability may let a malicious website access properties of a site in an arbitrary external domain in the context of the victim user's browser. Attackers could exploit this issue to gain access to sensitive information (such as cookies or passwords) that is associated with the external domain. This issue was previously reported as an Internet Explorer vulnerability, but the affected component is found to be part of Outlook Express and Windows Mail. Microsoft confirmed that this is an Outlook Express/Windows Mail vulnerability that can also be exploited through Internet Explorer.

Affected Products

• Microsoft Outlook Express 5.5
• Microsoft Outlook Express 5.5 SP1
• Microsoft Outlook Express 5.5 SP2
• Microsoft Outlook Express 6.0
• Microsoft Outlook Express 6.0 SP1
• Microsoft Outlook Express 6.0 SP2
• Microsoft Windows Mail

References

• BugTraq: 17717
• CVE: CVE-2006-2111
• URL: http://www.microsoft.com/technet/security/Bulletin/MS07-034.mspx