VRT Advisories

VRT Rules 2011-11-08

Sourcefire VRT Rules Update

Date: 2011-11-08


The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft Windows operating system.


Microsoft Security Advisory MS11-083:
The Microsoft Windows implementation of the TCP/IP networking stack contains a programming error that may allow a remote attacker to execute code or cause a Denial of Service (DoS) on an affected system.

A previously released rule will detect attacks targeting this vulnerability and is included in this release with updated reference information. It is identified with GID 1, SID 19678.

Microsoft Security Advisory MS11-085:
The Microsoft Windows Address Book component contains a programming error that may allow a remote attacker to execute code on an affected system. The problem occurs when the application attempts to process a malicious Windows Address Book Library file.

Rules to detect attacks targeting this vulnerability are included in this release and are identified with GID 1, SIDs 20541 and 20542.

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.

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