VRT Advisories


September 2009 Archive

VRT Rules 2009-09-28

Sourcefire VRT Rules Update

Date: 2009-09-28

Synopsis:

The Sourcefire VRT has added multiple rules in the exploit category to provide further coverage for threats in this category.

Details:

The Sourcefire VRT has added multiple rules in the exploit category to provide further coverage for threats in this category.

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 Sep 28, 2009



VRT Rules 2009-09-17

Sourcefire VRT Rules Update

Date: 2009-09-17

Synopsis:

This release adds and modifies rules in several categories.

Details:

As a result of ongoing research, the Sourcefire VRT has added multiple rules to the web-client, specific-threats, web-misc, misc, oracle and exploit rule sets to provide coverage for emerging threats from these technologies.

This release also contains precompiled shared object rules that are compatible with the Snort 2.8.5 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 Sep 17, 2009



VRT Rules 2009-09-15

Sourcefire VRT Rules Update

Date: 2009-09-15

Synopsis:

This release adds and modifies rules in several categories.

Details:

The Sourcefire VRT has added multiple rules in the specific-threats, dns, web-client, dos, ftp and misc to provide coverage for threats from these categories.

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 Sep 15, 2009



VRT Rules 2009-09-09

Sourcefire VRT Rules Update

Date: 2009-09-09

Synopsis:

The Sourcefire VRT is aware of a vulnerability affecting Microsoft products.

Details:

Microsoft SMB2 Denial of Service (DoS): A vulnerability in the way that Microsoft Windows systems process SMBv2.0 transactions may allow a remote attacker to execute code on a vulnerable system.

A previously released rule to detect attacks targeting this issue has been updated and is included in this release and is identified with GID 1, SID 15930.

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 Sep 09, 2009



VRT Rules 2009-09-08

Sourcefire VRT Rules Update

Date: 2009-09-08

Synopsis:

The Sourcefire VRT is aware of multiple vulnerabilities affecting Microsoft products.

Details:

Microsoft Security Advisory (MS09-045):
The Microsoft JScript scripting engine contains a programming error that may allow a remote attacker to execute code on an affected host.

A rule to detect attacks targeting this issue is included in this release and is identified with GID 3, SID 15913.

Microsoft Security Advisory (MS09-046):
The Microsoft DHTML Editing Component ActiveX control contains a programming error that may allow a remote attacker to execute code on an affected system.

Rules to detect attacks targeting this issue are included in this release and are identified with GID 1, SIDs 15923, 15924 and 15925.

A previously released rule will also detect attacks targeting this vulnerability and is identified with GID 1, SID 4148.

Microsoft Security Advisory (MS09-047):
A programming error in the way that Microsoft Windows systems parse certain types of Windows media files, may allow a remote attacker to execute code on an affected system.

Rules to detect attacks targeting this issue are included in this release and are identified with GID 3, SIDs 15914 through 15920.

Microsoft Security Advisory (MS09-048):
A vulnerability exists in the Microsoft Windows TCP/IP stack that may allow a remote attacker to execute code on an affected system.

A rule to detect attacks targeting this issue is included in this release and is identified with GID 3, SID 15912.

Additionally, the Stream preprocessor can be configured to detect attacks targeting this issue.
To do this, enable "require_3whs" and "detect anomalies" in snort.conf.

Microsoft SMB2 Denial of Service (DoS): A vulnerability in the way that Microsoft Windows systems process SMB2.0 transactions may allow a remote attacker to cause a Denial of Service (DoS) against a vulnerable machine.

A rule to detect attacks targeting this issue is included in this release and is identified with GID 1, SID 15930.

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 Sep 08, 2009



VRT Rules 2009-09-01

Sourcefire VRT Rules Update

Date: 2009-09-01

Synopsis:

This release adds and modifies rules in several categories.

Details:

Microsoft IIS FTP Buffer Overflow: The Microsoft FTP module for Internet Information Services (IIS) contains a programming error that may allow a remote attacker to execute code on an affected system. The problem occurs in the processing of specially crafted directory names which an attacker can leverage to cause a stack-based buffer overflow.

Previously released rules will detect attacks targeting this vulnerability and are identified with GID 1, SIDs 1529, 1973, 2374 and 3441. Additionally, the FTP Telnet preprocessor will detect attacks targeting this vulnerability. These events are identified with GID 125, SIDs 3, 6 and 8.

Additionally, as a result of ongoing research, the Sourcefire VRT has added multiple rules to the web-activex, web-client, specific-threats, shellcode and bad-traffic rule sets to provide coverage for emerging threats from these technologies.

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 Sep 01, 2009