VRT Advisories

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VRT Rules 2007-06-12

Sourcefire VRT Rules Update

Date: 2007-06-12

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting hosts using Microsoft products.

Details:

Microsoft Security Bulletin MS07-033:
Microsoft Internet Explorer suffers from multiple problems which may allow a remote attacker to execute code on an affected system.

COM Object Instantation Memory Corruption Vulnerability (CVE-2007-0218):
Multiple vulnerabilities exist in the way that Internet Explorer handles ActiveX controls. It may be possible for an attacker to instantiate COM objects on a vulnerable system by using an ActiveX control.

Rules to detect attacks targeting this vulnerability were previously released and are identified as SIDs 7904, 7905, 7928, 7929, 7934, 7935, 7938, 7939, 7942 through 7945 and SIDs 7958 and 7959.

Navigation Cancel Page Spoofing Vulnerability (CVE-2007-1752):
It may be possible for an attacker to display spoofed content in the Navigation cancelled information page in Internet Explorer. This may allow the 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 11834.

Speech Control Memory Corruption Vulnerability (CVE-2007-2222):
The Microsoft Speech API contains a programming error 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 11826 through 11833.

Microsoft Security Bulletin MS07-034:
Microsoft Mail fails to correctly handle UNC navigation requests. An attacker could utilize this vulnerability 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 11837.

Microsoft Security Bulletin MS07-034:
Microsoft Visio fails to correctly validate the version number contained in a document. An attacker can utilize this flaw 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 11836.

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.

Posted by on Jun 12, 2007



VRT Rules 2007-06-11

Sourcefire VRT Rules Update

Date: 2007-06-11

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Yahoo Messenger Webcam and Microsoft Office ActiveX controls.

Details:

Yahoo Messenger Webcam ActiveX Control (CVE-2007-3148 and CVE-2007-3147):
A buffer overflow condition in the Yahoo Messenger Webcam ActiveX control may allow remote attackers to execute code on an affected machine.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 11818 through 11825.

Microsoft Office 2000 ActiveX Control (CVE-2007-2903):
A buffer overflow condition in the Microsoft Office 2000 ActiveX control may allow remote attackers to cause a Denial of Service (DoS) against an affected host.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 11622 and 11623.

Numerous other new rules and modifications to existing rules are also included in this release.

Note: In order to use the rules for Snort version 2.6, the Snort version MUST be Snort 2.6.1.5. The rules for Snort CURRENT are for the Snort version from cvs HEAD.

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.

Posted by on Jun 11, 2007



VRT Tool 2007-06-04

Sourcefire VRT Tool Update

Date: 2007-06-04

Synopsis:

The Sourcefire VRT has updated the OfficeCat tool to provide coverage for a number of vulnerabilities affecting Microsoft Office document files.

Details:

The OfficeCat tool has been updated to provide coverage for the following vulnerabilities:

CVE-2006-0001 CVE-2006-3432 CVE-2006-3865 CVE-2006-4700 CVE-2006-4701 CVE-2006-5995

The OfficeCat tool is able to process Word, Excel and PowerPoint files and will return the appropriate reference information should possible exploit conditions be present in the document.

OfficeCat Tool Download:

Download zip archive here.

Usage Instructions:

  1. Unzip the archive
  2. Open a command shell
  3. Execute the tool executable with a document name for checking

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.

About Sourcefire

Sourcefire, Inc., the world leader in intrusion prevention, is transforming the way organizations manage and minimize network security risks with its 3D Approach - Discover, Determine, Defend - to securing real networks in real-time. For more information about Sourcefire, please visit www.sourcefire.com.

Posted by on Jun 04, 2007



VRT Rules 2007-05-24

Sourcefire VRT Update

Date: 2007-05-24

Synopsis:

The Sourcefire VRT is aware of a vulnerability affecting Apple OS X systems which may allow a remote attacker to execute code on an affected system.

Details:

Apple OS X mDNSResponder Buffer Overflow (CVE-2007-2386):
In the default configuration, Apple OS X has mDNSResponder installed and listening on an ephemeral port. This service suffers from a buffer overflow condition that is manifest when excess data in the Location header is sent in a connection.

An existing rule has been modified to detect attacks targeting this vulnerability and is included in this release. It is identified as SID 1388.

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.

Posted by on May 24, 2007



VRT Rules 2007-05-18

Sourcefire VRT Advisory

Date: 2007-05-18

Synopsis:

This release provides a fix for an error that may occur when editiing and saving a policy.

Details:

This release fixes an issue that causes an error when editing and saving policies. A solution to the problem is outlined in the advisory for SEU 76, this release fixes the problem and no further action is necessary.

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.

Posted by on May 18, 2007



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