VRT Advisories

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VRT Rules 2007-04-03

Sourcefire VRT Update

Date: 2007-04-03

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Real Networks Helix Server, IBM Lotus SameTime ActiveX control and an issue with ipv6 traffic handling on OpenBSD systems. This release also coincides with the release of Snort version 2.6.1.4.

Sourcefire has addressed a number of potential security-related issues in Snort as reported by open source users, uncovered by internal investigations, and through third-party code audits.

Details:

OpenBSD IPv6 Fragmentation Overflow (CVE-2007-1365) and OpenBSD ICMP6 Denial of Service (CVE-2007-0343):
This release includes detection capabilities for attacks that attempt to exploit the IPv6 fragmentation overflow in OpenBSD-based operating systems.

Important Information about IPv6 Fragmentation Overflow Detection

Detection of traffic that attempts to exploit the IPv6 fragmentation overflow issue is enabled by default. If your Snort Sensors are deployed inline on your network, the malicious traffic is dropped automatically.

In order to disable this functionality, the following line needs to be added to snort.conf.

	config ipv6_frag: drop_bad_ipv6_frag off

Events generated by the preprocessor are identified as GID 123 and SIDs 9 and 10.

Real Networks Helix Server (CVE-2006-6026):
The Real Networks Helix Server fails to properly check user supplied data to the application. This may allow a remote attacker to overflow a fixed length buffer and execute code on a vulnerable host.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 10407.

IBM Lotus SameTime (CVE-2007-1784):
IBM Lotus SameTime fails to properly process user supplied input. This may allow an attacker to load DLL files and execute code by supplying suitable arguments to the loadLibrary function.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10412 through 10417.

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 Apr 03, 2007



VRT Rules 2007-03-30

Sourcefire VRT Advisory

Date: 2007-03-30

Synopsis:

The Sourcefire VRT is aware of a vulnerability affecting Microsoft Windows XP systems that may allow an attacker to execute code on an affected system.

Details:

Microsoft Security Advisory (935423): Microsoft Windows XP systems with Service Pack 2 installed may be prone to a vulnerability that can allow an attacker to execute code on the affected system. The issue lies in the handling of animated cursor files (.ani), which may be embedded in a web page or in HTML email.

Systems using other versions of Microsoft Windows may also be affected.

A rule to detect attacks targeting this vulnerability was released on January 17, 2005. This rule is identified as SID 3079.

Sourcefire customers have been protected from this attack since this rule was released over 700 days ago.

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 Mar 30, 2007



VRT Tool 2007-03-26

Sourcefire VRT Tool Update

Date: 2007-03-26

Synopsis:

The Sourcefire VRT has updated the OfficeCat tool to provide coverage for Excel documents vulnerable to further attack vectors in CVE-2007-0671.

Details:

Microsoft Excel Malformed Record CVE-2007-0671:
The OfficeCat tool has been updated to included detection for vulnerable conditions present in Microsoft Excel documents to take into account extra attack vectors.

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 Mar 26, 2007



VRT Rules 2007-03-22

Sourcefire VRT Update

Date: 2007-03-22

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Microsoft Windows Server Service Controller, McAfee ePolicy Orchestrator and Symantec SupportSoft ActiveX controls.

Details:

Microsoft Windows Server Service Controller: The Server Service Controller is prone to a buffer overflow vulnerability that may allow an attacker to take complete control of the target host. Insufficient checks are made on user-supplied input to calls made to the svcctl function. This may allow an attacker to execute code of their choosing with system level privileges on an affected host.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10217 through 10386.

McAfee ePolicy Orchestrator CVE-2007-1498:
McAfee ePolicy Orchestrator fails to correctly process user-supplied input. It may be possible for a remote attacker to cause a buffer overflow condition to occur and execute code on the host system.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10387 through 10389.

Symantec SupportSoft CVE-2006-6490:
Symantec SupportSoft ActiveX controls used in various products fail to correctly process user-supplied input. It may be possible for a remote attacker to cause a buffer overflow condition to occur and execute code on the host system.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10214 through 10216.

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 Mar 22, 2007



VRT Rules 2007-03-08

Sourcefire VRT Update

Date: 2007-03-08

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting HP Mercury Loadrunner, Shockwave, Trend Micro Officescan and Wordpress. This release also includes more additions to the spyware-put and backdoor rule sets.

Details:

HP Mercury LoadRunner CVE-2007-0446:
The HP Mercury LoadRunner agent suffers from a programming error that may allow a remote attacker to cause a stack-based buffer overflow condition to occur. This may lead to code execution of the attacker's choosing.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 10187.

Trend Micro OfficeScan CVE-2007-0325:
The Trend Micro OfficeScan Web-Deployment ActiveX control contains a programming error that may allow remote attackers to execute code on an affected host via a specially crafted web page.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10173 through 10175.

WordPress CVE-2007-1277:
The WordPress 2.1.1 source code was compromised by an attacker who then introduced a backdoor into the application. This may allow other attackers to execute commands or code of their choosing on an affected server.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10196 and 10197.

Macromedia Shockwave Flash ActiveX control: Macromedia Shockwave Flash contains a programming error that may allow a remote attacker to execute code of their choosing on an affected host using the ActiveX control.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10214 through 10216.

Also, the Sourcefire VRT has added multiple new rules to the backdoor and spyware-put categories in this release.

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 Mar 08, 2007



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