VRT Advisories


VRT Rules 2007-05-08

Sourcefire VRT Update

Date: 2007-05-08

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Microsoft DNS Server Service, Microsoft Exchange Server, Microsoft CAPICOM, Microsoft Internet Explorer and Microsoft Excel.

Details:

Microsoft Security Bulletin MS07-029
Microsoft DNS Server Service is prone to a vulnerability that may allow a remote attacker to execute code on an affected system. The issue is present in the RPC interface of servers using Microsoft's implementation of DNS.

In order to detect attacks targeting this vulnerability, the DCE/RPC preprocessor must be configured to use 'autodetect'. This is the default behavior for this preprocessor.

Detection for attacks targeting this vulnerability was previously released.

Microsoft Security Bulletin MS07-028
A vulnerability in Microsoft Cryptographic API Component Object Model (CAPICOM) may allow a remote attacker to execute code on an affected system.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 11230 through 11235

Microsoft Security Bulletin MS07-027
Microsoft Internet Explorer suffers from programming errors that may allow a remote attacker to execute code on an affected system.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 11224 through 11229, 11247, 11248 and 11257.

Also, other rules that detect attacks targeting this vulnerability were previously released and are identified as SIDs 9427 and 9428.

Microsoft Security Bulletin MS07-026
Microsoft Exchange Server incorrectly handles certain electronic mail transactions. This may allow a remote attacker to execute code on an affected system.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 11222.

Additionally, a rule that also detects attacks targeting this vulnerability was previously released and is identified as SID 2665.

Microsoft Security Bulletin MS07-023
Microsoft Excel is prone to a vulnerability that may allow a remote attacker to execute code on an affected system.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 11258.

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.