VRT Advisories

VRT Rules 2006-09-01

Sourcefire VRT Update

Date: 2006-09-01


The Sourcefire VRT has continued research into vulnerabilities affecting Microsoft Internet Explorer and has also added multiple new rules in the spyware-put category. The VRT has also improved the performance of multiple rules and has improved reference information for multiple rules.


Multiple vulnerabilities exist in the way that Microsoft Internet Explorer handles ActiveX controls. It may be possible for an attacker to execute code of their choosing on a system using Internet Explorer.

Rules to detect attacks against these vulnerabilities are included in this rule pack and are identified as sids 7862 through 8058.

As a result of continuing research in the field of Spyware and potentially unwanted technology, the Sourcefire VRT has added multiple rules to the Spyware and Backdoor rule sets.

Each rule is also accompanied by detailed documentation for each Trojan, Spyware and potentially unwanted software to assist in determining the likelihood of infection and has relevant links to information regarding their removal.

These rules are identified as sids 7794 through 7857.

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.