Bofra Worm Spreads by Banner Ads

One more reason to keep your "Critical Updates" updated...

Web site visitors who clicked on banner ads on a number of popular European Web sites this weekend could have infected their computers with variants of the Bofra worm, experts warn.

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The attacks take advantage of an unpatched buffer overflow flaw in the way Internet Explorer 6 handles the IFrame tag, and has been confirmed on PCs running Windows XP with Service Pack 1 and Windows 2000 (news - web sites), according to a warning posted Sunday on the SANS (SysAdmin, Audit, Network, Security) Institute Web site. Windows XP Service Pack 2 (SP2) is not vulnerable, it said.
The vulnerability allows attackers to gain complete control of a user's computer. [more..]