VRT Advisories


VRT Rules 2006-09-21

Sourcefire VRT Update

Date: 2006-09-21

Synopsis:

The Sourcefire VRT has learned of a vulnerabilities in Microsoft Windows systems that may present an attacker with the opportunity to execute code of their choosing on affected systems.

Details:

Microsoft Security Advisory (925568) Microsoft Internet Explorer suffers from a buffer overflow condition that may allow an attacker to execute code of their choosing on an affected host. The condition is manifest when processing pages using Vector Markup Language. This vulnerability is being used as an attack vector for the Trojan Horse program Trojan.Vimalov.

A rule to detect attacks targeting this vulnerability is included in this rule pack and is identified as sid 8416.

Microsoft Security Bulletin MS06-039 Microsoft Office programs are prone to a buffer overflow condition when processing malformed GIF images. This may present an attacker with the opportunity to execute code of their choosing on an affected host.

A rule to detect attacks targeting this vulnerability is included in this rule pack and is identified as sid 8414.

Rule Pack Summary:

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

Warning:

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.