VRT Advisories

VRT Rules 2010-09-23

Sourcefire VRT Rules Update

Date: 2010-09-23


The Sourcefire VRT is aware of a vulnerability affecting Microsoft .NET applications.


Microsoft .NET Framework Information Disclosure (CVE-2010-3332): The Microsoft .NET Framework discloses enough information in error responses that an attacker is able to decrypt and modify encrypted data. The attacker is also able to forge cookies and obtain application files via an Oracle padding attack.

Rules to detect attacks targeting this vulnerability are included in this release and are identified with GID 3, SIDs 17428 and 17429.

Additionally, the Sourcefire VRT has added and modified multiple rules in the chat, dos, exploit, ftp, icmp, imap, mysql, netbios, oracle, shellcode, specific-threats tftp, web-activex, web-client and web-misc rule sets to provide coverage for emerging threats from these technologies.

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.

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