VRT Advisories

VRT Rules 2006-06-27

Sourcefire VRT Update

Date: 2006-06-27


The Sourcefire VRT has continued research into a vulnerability affecting the Microsoft Operating System Routing and Remote Access Service (RRAS) and a vulnerability affecting Microsoft Excel.


Microsoft Security Bulletin MS06-025 Microsoft operating systems using Routing and Remote Access (RRAS) are vulnerable to a memory corruption problem that may be exploited by unauthenticated users. This may lead to code of the attackers choosing being run on an affected host.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 6714 through 7001.

Microsoft Security Advisory (921365) Microsoft Excel contains a programming error that can allow a remote attacker to run code of their choosing on an affected host system via the processing of a malformed .xls file. The issue is present in the dynamic link library file HLINK.DLL which handles Universal Resource Identifiers (URI) embedded in office documents.

A rule to detect attacks against this vulnerability is included in this rule pack and is identified as sid 7002.

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.