VRT Advisories


VRT Rules 2005-05-31

Sourcefire VRT Certified Rules Update

Date: 2005-05-31

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has learned of serious vulnerabilities affecting MySQL and Ethereal. The VRT has also completed work to normalize older rules to improve the detection capabilities of the Snort engine.

Details:

There are two vulnerabilities associated with MySQL password authentication. The first vulnerability may permit an unauthorized user access to the server if the attacker knows an authorized username and crafts a malicious client password hash. The second vulnerability may cause a denial of service or buffer overflow if an attacker knows an authorized username and crafts an overly long password hash.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 3665 and 3672.

An error in the processing of tcp packets in a SIP protocol transaction may lead to a Denial of Service (DoS) condition in Ethereal. The SIP parsing routine does not properly check the length of data supplied to a fixed length buffer in the processing of the SIP data.

Rules to detect attacks against this vulnerbility are included in this rule pack and are identified as sids 3677 and 3678.

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 network security industry.