VRT Advisories

VRT Rules 2007-04-10

Sourcefire VRT Update

Date: 2007-04-10


The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft UPnP service and the Microsoft Agent.


Microsoft Security Bulletin (MS07-019):
Microsoft Universal Plug and Play does not correctly handle malformed HTTP requests. This may allow an attacker to overflow a buffer and execute code on a vulnerable host.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 10475.

Microsoft Security Bulletin (MS07-020):
Microsoft Agent does not correctly handle malformed URLs. This may allow an attacker to cause a buffer overflow condition to occur and subsequently, execute code on an affected system.

Previously released rules will generate events when attempts are made to exploit this condition. These rules are identified as SIDs 4172 and 8846 through 8856. In addition, new rules are included in this release to detect attacks targeting this vulnerability and are identified as SIDs 10465 and 10474.

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.