Exploit based on leaked Windows code released

Tuesday, 17 February 2004, 1:51 PM EST

The first new security vulnerability to emerge from last week's Microsoft source code leak crossed a security mailing list over the weekend, reigniting debate over the seriousness of the leak.

The vulnerability affects Internet Explorer 5 and various versions of Outlook Express. It was unearthed in code the two programs use to process bitmap image files, and affects the software on several versions of Windows, including 98, 2000 and XP. While some systems appear to be immune to the glitch, a proof-of-concept exploit that was posted to the Full Disclosure mailing list crashes Outlook Express 6 on Windows XP systems. Service Pack 1 appears to correct the vulnerability.

By Patrick Gray at SecurityFocus.

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