VRT Advisories


VRT Rules 2009-12-08

Sourcefire VRT Rules Update

Date: 2009-12-08

Synopsis:

The Sourcefire VRT is aware of multiple vulnerabilities affecting Microsoft products.

Details:

Microsoft Security Advisory MS09-070:
A vulnerability in Microsoft Active Directory may allow a remote attacker 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 3, SID 16312.

Microsoft Security Advisory MS09-071:
A vulnerability in the Microsoft Challenge Handshake Authentication Protocol (MS-CHAPv2) may allow a remote attacker to escalate privileges on an affected system. This does not require authentication to exploit.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 3, SID 16329.

Microsoft Security Advisory MS09-072:
Microsoft Internet Explorer contains several vulnerabilities that may allow a remote attacker to execute code on a vulnerable system.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 3, SIDs 16317, 16326 and 16330.

Additionally, previously released rules that will also detect attacks targeting these vulnerabilities are identified with GID 1, SIDs 15638, 15639, 16159 through 16166, 16310 and 16311.

Microsoft Security Advisory MS09-073:
The Microsoft Word converter fails to correctly validate user-supplied input. As a result, an attacker may leverage this error 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 3, SID 16314.

Microsoft Security Advisory MS09-074:
Microsoft Project contains a programming error that may allow a remote attacker to execute code on an affected system via the use of a specially crafted file.

A rule to detect attacks targeting this vulnerability is included in this release and is identified with GID 1, SID 16328.

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.