VRT Advisories

VRT Rules 2009-11-23

Sourcefire VRT Rules Update

Date: 2009-11-23


The Sourcefire VRT is aware of a vulnerability in Microsoft Internet Explorer.


Microsoft Internet Explorer Code Execution: Microsoft Internet Explorer suffers from a programming error that may allow a remote attacker to execute code on an affected system. The issue is present when the application attempts to parse an invalid reference type in an HTML tag. This affects Internet Explorer versions 6 and 7 and does not affect version 8.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 1, SID 16310.

Additionaly, rules have been added in the specific-threats, web-activex and oracle rule sets to provide coverage for emerging threats from these technologies.

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.