VRT Advisories

VRT Rules 2011-02-01

Sourcefire VRT Rules Update

Date: 2011-02-01


The Sourcefire VRT is aware of a vulnerability in Microsoft Internet Explorer. This release also adds and modifies rules in several categories.


Microsoft Security Advisory (CVE-2011-0096):
Microsoft Internet Explorer suffers from a programming error that may allow a remote attacker to execute a cross site scripting attack. This attack could then lead to information disclosure.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 1, SID 18335.

Additionally, the Sourcefire VRT has added and modified multiple rules in the exploit, ftp, netbios, oracle, scada, web-activex, web-client and web-misc 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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