VRT Advisories


VRT Rules 2006-09-15

Sourcefire VRT Update

Date: 2006-09-15

Synopsis:

The Sourcefire VRT has learned of multiple vulnerabilities affecting hosts using the Microsoft Operating system.

Details:

Microsoft Security Bulletin MS06-054 Microsoft Publisher suffers from a programming error that may allow a remote attacker to execute code of their choosing on an affected host. The error is manifest when Publisher processes fonts embedded in a .pub file.

A Rule to detect attacks against this vulnerability is included in this rule pack and is identified as sid 8350.

Microsoft Security Bulletin MS06-053 Microsoft Indexing Service fails to correctly process user supplied input which may allow a remote attacker to execute a cross site scripting attack against a vulnerable server.

A Rule to detect attacks against this vulnerability is included in this rule pack and is identified as sid 8349.

Microsoft Security Bulletin MS06-008 A buffer overflow condition exists in the Microsoft Web Client service which may allow a remote attacker to execute code of their choosing on an affected system. The flaw can be exploited by an authenticated or guest user via RPC.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 8157 through 8348.

Microsoft Security Bulletin MS06-007 The Microsoft Windows Operating system suffers from a Denial of Service (DoS) condition that is present when handling malformed IGMPv3 data.

A shared object rule to detect attacks against this vulnerability is included in this rule pack and is identified as gid 3 sid 8092.

Microsoft Security Bulletin MS06-041 The Microsoft Windows DNS Client is vulnerable to a buffer overflow condition when handling RDATA in server responses. A remote attacker can take advantage of this to execute code of their choosing on an affected system.

A new DNS dynamic preprocessor has been developed and released to detect attacks against this vulnerability. This preprocessor has the gid 131 and sids 1 through 3.

Note:In order to use this new pre-processor, Snort 2.6.0.2 must be downloaded. Refer to the README.dns for configuration options. In order to detect attacks against MS06-041 the following configuration is required:

  preprocessor dns: ports {53} enable_rdata_overflow

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.