VRT Advisories

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VRT Rules 2006-08-09

Sourcefire VRT Update

Date: 2006-08-09

Synopsis:

The Sourcefire VRT has added multiple rules to detect attempts to exploit vulnerabilities in the Microsoft Windows operating system.

Details:

Microsoft Security Bulletin MS06-040 A buffer overflow condition in the Microsoft Windows Server Service may allow a remote attacker to execute code of their choosing on a target system. The overflow condition can be triggered by malformed requests to the service accessing certain functions.

Rules to detect attacks against these vulnerabilities are included in this rule pack and are identified as sids 7209 through 7304.

Microsoft Security Bulletin MS06-042 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 against these vulnerabilities are included in this rule pack and are identified as sids 7425 through 7501.

Microsoft Security Bulletin MS06-043 Microsoft Internet Explorer contains a programming error in the way that it processes MIME HTML links (mhtml). This error may allow an attacker to overflow a fixed length buffer and execute code of their choosing on an affected host.

Rules to detect attacks against this vulnerability were released on 13 June 2006 and are identified as sids 6509 and 6510.

Microsoft Security Bulletin MS06-044 Microsoft Management Console is prone to a cross site scripting attack that may allow an attacker to execute code of their choosing on a system and gain unauthorized administrative access to an affected host.

Rules to detect attacks against these vulnerabilities are included in this rule pack and are identified as sids 7422 through 7424.

Microsoft Security Bulletin MS06-046 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 against these vulnerabilities are included in this rule pack and are identified as sids 7439 and 7440. In addition, sid 7004 released on 6 July 2006 also pertains to this issue.

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 Aug 09, 2006



VRT Rules 2006-08-02

Sourcefire VRT Update

Date: 2006-08-02

Synopsis:

The Sourcefire VRT has added multiple rules to detect attempts to exploit vulnerabilities in the Microsoft DHCP Client Service, Microsoft Excel and Microsoft Word.

Details:

Microsoft Security Bulletin MS06-036 A buffer overflow condition in the Microsoft Windows DHCP client service may allow a remote attacker to execute code of their choosing on a target system. The overflow can be triggered when the client service attempts to process a malformed server response.

A module to detect attacks against this vulnerability is included in this rule pack and is identified as gid 3 sid 7196.

Microsoft Security Bulletin MS06-038 Multiple vulnerabilities exist in the Microsoft Office suite of programs that may allow a remote attacker to execute code of their choosing on an affected host. The vulnerabilities lie in the processing of malformed strings or properties in a document.

Rules to detect attacks against these vulnerabilites are included in this rule pack and are identified as sids 7197 through 7205.

Microsoft Security Bulletin MS06-035 Microsoft Windows SMB service is subject to a Denial of Service condition. While this is not related directly to the vulnerabilities outlined in MS06-035, after continuing research the Sourcefire VRT has determined that slight modifications to rules previously released will detect attempts to use attack vectors targeting this vulnerability.

The updated rules are included in this rule pack and are identified as sids 7035 through 7046.

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 Aug 02, 2006



VRT Rules 2006-07-28

Sourcefire VRT Update

Date: 2006-07-28

Synopsis:

The Sourcefire VRT has added multiple rules to detect the use of Spyware and potentially unwanted technology on a network.

Details:

As a result of continuing research in the field of Spyware and potentially unwanted technology, the Sourcefire VRT has added multiple rules to the Spyware and Backdoor rule sets.

Each rule is also accompanied by detailed documentation for each Spyware, trojan and potentially unwanted software to assist in determining the likelihood of infection and has relevant links to information regarding their removal.

This rule pack also contains a module for the detection of the Japanese peer-to-peer application "Winny".

The module is identified with gid 3 and sid 7019.

For instructions on how to use this module, refer to the Snort manual section regarding "Shared Object Rules".

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 Jul 28, 2006



VRT Rules 2006-07-20

Sourcefire VRT Advisory

Date: 2006-07-20

Synopsis:

The Sourcefire VRT has released a new version of the DocCheck tool.

Details:

The Sourcefire VRT has updated the DocCheck tool to fix a known problem that may arise under certain circumstances. The older version of the tool contains an error that may prevent the tool from operating correctly.

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.

DocCheck Tool Download:

download zip archive here

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 Jul 20, 2006



VRT Rules 2006-07-18

Sourcefire VRT Advisory

Date: 2006-07-18

Synopsis:

The Sourcefire VRT has researched a vulnerability affecting Microsoft Powerpoint and has updated the DocCheck tool to process ppt files to determine the possible presence of exploit conditions.

Details:

Microsoft Security Advisory (922970) Microsoft Powerpoint suffers from a programming error that may allow an attacker to execute code of their choosing on an affected system by including that code in a specially crafted Powerpoint file.

The Sourcefire VRT has updated the DocCheck tool to examine Powerpoint files and report possible malformed files that could exploit this vulnerability.

DocCheck Tool Download:

download zip archive here

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 Jul 18, 2006



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