VRT Advisories

VRT Rules 2006-05-26

Sourcefire VRT Update

Date: 2006-05-24


The Sourcefire VRT has learned of vulnerabilities affecting hosts using RealVNC.


RealVNC is a multiplatform remote administration tool that allows networked hosts to connect to other hosts or mobile devices. It has a client-server architecture that requires the remote user to authenticate on connection to a RealVNC server.

A programming error in the authentication mechanism for RealVNC may allow an attacker to gain access to the host without supplying the correct credentials.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 6469 through 6471.

In response to continued feedback regarding the spyware-put rules, the Sourcefire VRT is continuing to improve coverage provided by these rules and the accuracy of detection. This rulepack contains modifications to this set of rules.

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 network security industry.