VRT Advisories


VRT Rules 2011-12-01

Sourcefire VRT Rules Update

Date: 2011-12-01

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added and modified multiple rules in the attack-responses, backdoor, bad-traffic, botnet-cnc, deleted, dos, exploit, file-identify, netbios, oracle, rservices, scada, smtp, specific-threats, spyware-put, web-activex, web-client and web-php rule sets to provide coverage for emerging threats from these technologies.

Note:
The fileidentify flowbit group has been removed. This could lead to your local rules no longer working. You must modify local rules using this flowbit group before you can use them in policies.

For example, if you have a rule that uses the fileidentify flowbit group with the following set of options:

flowbits:set,http.mpeg,fileidentify;

You must remove the fileidentify group name for the rule to continue working. The modified rule would then contain the following:

flowbits:set,http.mpeg;

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 the network security industry.

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