VRT Advisories

VRT Rules 2007-05-24

Sourcefire VRT Update

Date: 2007-05-24


The Sourcefire VRT is aware of a vulnerability affecting Apple OS X systems which may allow a remote attacker to execute code on an affected system.


Apple OS X mDNSResponder Buffer Overflow (CVE-2007-2386):
In the default configuration, Apple OS X has mDNSResponder installed and listening on an ephemeral port. This service suffers from a buffer overflow condition that is manifest when excess data in the Location header is sent in a connection.

An existing rule has been modified to detect attacks targeting this vulnerability and is included in this release. It is identified as SID 1388.

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.