VRT Advisories

VRT Rules 2012-04-11

Sourcefire VRT Rules Update

Date: 2012-04-11


This release adds and modifies rules in several categories and includes detection for a Remote Code Execution (RCE) vulnerability in Samba.


Samba Remote Code Execution (CVE-2012-1182): The RPC code generator in certain versions of Samba does not correctly validate an array length. This error may allow remote attackers to execute code on an affected system.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 1, SID 21806.

Additionally, the Sourcefire VRT has added and modified multiple rules in the exploit, file-identify, file-office, indicator-compromise and web-client 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.

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