VRT Advisories

VRT Rules 2007-01-09

Sourcefire VRT Update

Date: 2007-01-09


The Sourcefire Vulnerability Research Team (VRT) has discovered a serious vulnerability affecting Microsoft Outlook and is aware of a vulnerability affecting Adobe Acrobat Reader.


Microsoft Security Bulletin MS07-003:
The Sourcefire VRT has discovered a remotely exploitable vulnerability in Microsoft Outlook when it is used to process iCal calendar requests. iCal files may be used in meeting requests and can be sent to recipients using email. Included in an iCal request is time zone data that is used on the system to automatically populate the calendar in Outlook with the contents of the file.

An error in the processing of time zone data in a VEVENT record of an iCal file may allow a remote attacker to execute arbitrary code on a vulnerable system with the privileges of the current user. This may lead to the complete compromise of an affected host.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 9841.

Adobe Acrobat Reader Plugin CVE-2007-0046:
The Adobe Acrobat Reader Plugin does not correctly process user-supplied input in the parameters supplied to a URI. This may allow a remote attacker to execute arbitrary code on an affected system.

Rules to detect attacks targeting this vulnerability are included in this release and are identifed as SIDs 9842 and 9843.

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.