VRT Advisories


VRT Rules 2006-10-10

Sourcefire VRT Advisory

Date: 2006-10-10

Synopsis:

Microsoft has released a number of bulletins regarding vulnerabilities in its products. A number of these issues have been previously covered by Sourcefire VRT rule packs and by the OfficeCat tool.

Details:

Microsoft Security Bulletin MS06-056:
The Microsoft .NET Framework is vulnerable to a cross site scripting vulnerability that may allow remote attackers to access sensitive information.

Rules to detect attacks targeting this vulnerability were previously released and are identified as sids 1497 and 7070.

Microsoft Security Bulletin MS06-057:
Multiple vulnerabilities exist in the way that Microsoft Internet Explorer handles ActiveX controls. It may be possible for an attacker to execute code of their choosing on a system using Internet Explorer.

Rules to detect attacks targeting this vulnerability were previously released and are identified as sids 7985 through 7988 and sid 8419.

Microsoft Security Bulletin MS06-063:
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 attacks targeting this vulnerability were previously released and are identified as sids 7035 through 7046.

Microsoft Security Bulletins MS06-058, MS06-059 and MS06-060:
Microsoft Office products (Word, Excel and Powerpoint) are prone to vulnerabilities that may allow an attacker to execute code of their choosing on an affected host via a malformed file.

The OfficeCat tool, previously released by the Sourcefire VRT, is able to process these files to determine if possible exploit conditions exist in an Office document.

Note:
All previously released rules are contained in the latest rule pack, it is not necessary to install prior rule packs to get the relevant rules mentioned in this advisory.

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.