VRT Advisories


VRT Rules 2006-07-13

Sourcefire VRT Update

Date: 2006-07-13

Synopsis:

The Sourcefire VRT has learned of vulnerabilities affecting hosts using the Microsoft Operating System and hosts using the Linux 2.6 kernel.

Details:

Microsoft Security Bulletin MS06-035 The mailslot service is used on hosts using the Microsoft Operating System to handle messages between hosts on a domain.

An unchecked buffer in the mailslot server service may allow an attacker to overflow a fixed length buffer and execute code of their choosing on an affected host.

Rules to detect attempts to exploit this vulnerability are included in this rule pack and are identified as sids 7035 through 7046.

Microsoft Security Bulletin MS06-037 An Excel file containing a chart object and another additional object of any type with a large header length value, can be used to overflow a fixed length buffer and execute code of the attackers choosing on an affected host.

Rules to detect attempts to exploit this vulnerability are included in this rule pack and are identified as sids 7047 and 7048.

Linux hosts using the Netfilter module may be subject to a Denial of Service (DoS) condition when trying to process SCTP packets that do not contain chunks.

A rule to detect attempts to exploit this vulnerability is included in this rule pack and is identified as sid 7021.

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.