Three vulnerabilities have been reported in Microsoft Windows Vista, which can be exploited by malicious people to compromise a user's system.

1) An error in the Feed Headlines gadget when parsing HTML attributes can be exploited to execute arbitrary code via a specially crafted RSS post.

Successful exploitation requires that a user e.g. is tricked into subscribing to a malicious RSS feed in the Feed Headlines gadget using Internet Explorer.

2) An error in the Contacts Gadget when processing contacts can be exploited to execute arbitrary code when selecting a specially-crafted contact or if it is the first contact in the list.

Successful exploitation requires that a user e.g. is tricked into adding or importing a malicious contact into the Contacts Gadget (not enabled by default).

3) An error in the Weather Gadget when processing HTML attributes can be exploited to execute arbitrary code when a user e.g. clicks on a link on the affected gadget.

Successful exploitation requires a MitM (Man-in-the-Middle) attack and that the links are visible in the Weather Gadget by dragging and dropping the gadget on the desktop.

Solution
Apply patches.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Discovered by Aviv Raff and reported via iDefense Labs.
2) The vendor credits Aviv Raff, Finjan.
3) Reported by the vendor.

Changelog
Further details available to Secunia VIM customers

Original Advisory
MS07-048 (KB938123):
http://www.microsoft.com/technet/security/Bulletin/MS07-048.mspx

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=575

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers