VRT Rules 2009-02-27
Sourcefire VRT Rules Update
The Sourcefire VRT is aware of a vulnerability in Microsoft Excel that is being actively exploited by a Trojan Horse program.
Microsoft Excel Code Execution (CVE-2009-0238):
Microsoft Excel contains a programming error that may allow a remote attacker to execute code on a vulnerable system. The problem occurs when Excel attempts to process a specially crafted document with an invalid object.
This issue is being actively exploited by Trojan.Mdropper.AC.
A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 3, SID 15365.
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.