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Microsoft Internet Explorer Webdav Request Parsing Heap Corruption Vulnerability

December 9th, 2008

Vulnerability Details

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer 7 on the Microsoft Vista operating system. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists during a WebDAV fetch of a document from a path containing a large number of characters. Mishandling of cached content results in a heap corruption which can be leveraged to execute arbitrary code under the context of the current instance of Internet Explorer.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS08-073.mspx

Disclosure Timeline

  • 2008-05-19 - Vulnerability reported to vendor
  • 2008-12-09 - Coordinated public release of advisory

Credit

Brett Moore, Insomnia Security

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