VRT Advisories

VRT Rules 2007-11-28

Sourcefire VRT Rules Update

Date: 2007-11-28


The Sourcefire VRT is aware of a vulnerability in Apple QuickTime and has added multiple rules in the spyware-put and backdoor categories to provide coverage for emerging spyware and Trojan Horse threats. This release also contains an updated version of the detection engine for the Sourcefire 3D System.


Apple QuickTime RTSP buffer overflow (VU#659761): Apple QuickTime contains a buffer overflow vulnerability that may allow a remote attacker to execute code on an affected system. The problem occurs in the handling of Content-Type header information.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 12741 and 12742.

Additionaly, as a result of ongoing research, the Sourcefire VRT has added multiple rules to the spyware-put and backdoor 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.