VRT Advisories

VRT Rules 2007-11-13

Sourcefire VRT Rules Update

Date: 2007-11-13


The Sourcefire VRT is aware of a vulnerability affecting hosts using Microsoft Windows XP and Microsoft Windows Server 2003.


Microsoft Security Bulletin MS07-061:
The URL handling in Windows XP and Windows Server 2003, with Windows Internet Explorer 7 installed, allows remote attackers to execute arbitrary programs via invalid "%" sequences.

Previously released rules are able to detect attacks targeting this vulnerability and are identified as SIDs 12643, 12664, 12687 and 12688.

Rule Pack Summary:

For a complete list of new and modified rules, click here.


Sourcefire VRT rule packs often utilize enhancements made to Snort. Operators should upgrade to the latest revision or patch level for Snort to ensure these enhancements are available before using these rules.

About the VRT:

The Sourcefire VRT is a group of leading edge intrusion detection and prevention experts working to proactively discover, assess and respond to the latest trends in hacking activity, intrusion attempts and vulnerabilities. This team is also supported by the vast resources of the open source Snort community, making it the largest group dedicated to advances in the network security industry.