VRT Advisories


VRT Rules 2006-11-14

Sourcefire VRT Update

Date: 2006-11-14

Synopsis:

The Sourcefire VRT is aware of multiple vulnerabilities affecting systems using the Microsoft Windows Operating System some of which could allow an attacker to execute code or cause a Denial of Service (DoS) on an affected system.

Details:

Microsoft Security Bulletin MS06-067:
Mulitple vulnerabilities exist in the way that Microsoft Internet Explorer handles ActiveX controls. It may be possible for a remote attacker to execute code of their choosing on an affected system via Internet Explorer.

Rules to detect attacks targeting these vulnerabilities are included in this rule pack and are identified as sids 8741 through 8845.

A rule to detect attacks targeting this vulnerability was also released on September 1st 2006 and is identified as sid 8053. Additionally, sid 7009 released on July 6, 2006 may also generate events indicating possible exploit attempts relating to this vulnerability.

Microsoft Security Bulletin MS06-068:
Microsoft Agent fails to correctly process a malformed HTTP character file (.ACF). Sucessful exploitation of this vulnerability may allow an attacker to execute code of their choosing on an affected system.

Rules to detect attacks targeting this vulnerability are included in this rule pack and are identified as sids 8846 through 8856.

Additionally, sid 4172 released on September 19, 2005 may also generate events indicating possible exploit attempts relating to this vulnerability.

Microsoft Security Bulletin MS06-069:
Macromedia Flash Player suffers from several vulnerabilities that may allow an attacker to execute code of their choosing on an affected system.

A rule to detect attacks targeting this vulnerability was released on July 13, 2006 and is identified as sid 7025.

Microsoft Security Bulletin MS06-070:
The Microsoft Workstation Service is prone to a buffer overflow vulnerability that may allow a remote attacker to execute code of their choosing on an affected system.

Rules to detect attacks targeting this vulnerability are included in this rule pack and are identified as sids 9027 through 9128.

Microsoft Security Bulletin MS06-071:
Microsoft systems using the XMLHTTP 4.0 ActiveX control may be prone to a vulnerability that could allow a remote attacker to execute code of their choosing on that host.

Rules to detect attacks targeting this vulnerability were released on November 6, 2006 and are identified as sids 8727 and 8728.

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.