VRT Advisories

VRT Rules 2006-09-19

Sourcefire VRT Update

Date: 2006-09-19


The Sourcefire VRT has learned of a vulnerability in the way that Microsoft Windows systems process Pragmatic General Multicast (PGM) traffic.


Microsoft Security Bulletin MS06-052 When hosts using certain versions of the Microsoft Windows operating system attempt to process PGM messages using the Microsoft Message Queuing Service (MSMQ), the system may be exposed to a buffer overflow condition. If the message contains more options than indicated in the packet header, a static buffer may be overflowed allowing an attacker to possibly execute code of their choosing on an affected host.

A shared object rule to detect attacks against this vulnerability is included in this rule pack and is identified as gid 3 sid 8351.

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.