VRT Advisories

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VRT Rules 2005-11-08

Sourcefire VRT Certified Rules Update

Date: 2005-11-08

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has learned of a worm traversing the Internet that targets known vulnerabilities in certain PHP and CGI scripts. The worm, known as Lupper or Plupii, makes requests on port 80 for various scripts such as xmlrpc.php and awstats.pl.

The Sourcefire VRT has confirmed that a rule identified as sid 3827, released on July 22, 2005, will generate events when this worm tries to exploit the vulnerability in the PHP XML-RPC module. The Sourcefire VRT has also confirmed that a rule identified as sid 3813, released on June 30, 2005, will generate events when the worm tries to use the awstats vulnerability as an attack vector.

Details:

Analysis of the worm indicates that it attempts to exploit a weakness in the PHP XML-RPC module by making a malicious POST request to the xmlrpc.php script used by some PHP based applications. The worm may also try to exploit a weakness in the awstats application that can allow command execution on an affected host.

Successful exploitation results in the worm downloading a Trojan Horse program named lupii, that opens either port 7111 or 7222 to establish a UDP based control channel. The infected host then starts to perform a scan to detect other potential victims at random IP addresses. Once a host is identified, the worm then attempts to spread using the attack vectors outlined above.

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 network security industry.

Posted by on Nov 08, 2005



VRT Rules 2005-10-25

Sourcefire VRT Certified Rules Update

Date: 2005-10-25

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has learned of multiple vulnerabilities affecting hosts using the Microsoft operating system.

Details:

Microsoft Security Bulletin MS05-046:

A vulnerability in the implementation of the Client Service for Netware exists due to a programming error which may present an attacker with the opportunity to exploit the service and run code of their choosing on an affected system.

Rules to detect exploits aimed at this vulnerability are included in this rule pack and are identified as sids 4509 through 4636.

Microsoft Security Bulletin MS05-043:

A vulnerability in the implementation of the Print Spooler Service on Microsoft Windows systems exists due to a programming error which may present an attacker with the opportunity to exploit the service and run code of their choosing on an affected system.

Rules to detect exploits against this vulnerability are included in this rule pack and are identified as sids 4381 through 4508.

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 network security industry.

Posted by on Oct 25, 2005



VRT Rules 2005-10-12

Sourcefire VRT Certified Rules Update

Date: 2005-10-12

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has learned of multiple vulnerabilities affecting hosts using the Microsoft Windows operating system.

Details:

Microsoft Security Bulletin MS05-047: A vulnerability exists in the Microsoft Plug and Play subsystem that may present a remote attacker with the opportunity to overflow a fixed length buffer, execute code on the vulnerable system and escalate privileges on the host to the extent that they could take complete control of the affected machine.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 4253 through 4380.

Microsoft Security Bulletin MS05-051: A vulnerability exists in the Microsoft Distributed Transaction Coordinator (DTC) system that may present a remote attacker with the opportunity to overflow a fixed length buffer, execute code on the vulnerable system and escalate privileges on the host to the extent that they could take complete control of the affected machine.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 4237 through 4252.

Microsoft Security Bulletin MS05-052: Multiple vulnerabilities exist in Microsoft Internet Explorer that may allow an attacker to execute code of their choosing on a vulnerable system. This can be achieved by manipulating the trust between Internet Explorer and ActiveX objects.

Rules to detect attacks against these vulnerabilities are included in this rule pack and are identified as sids 4198 through 4236.

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 network security industry.

Posted by on Oct 12, 2005



VRT Rules 2005-09-27

Sourcefire VRT Certified Rules Update

Date: 2005-09-27

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has made numerous rule reference additions and documentation improvements as well as adding new rules to detect attempts to exploit vulnerabilities in Microsoft Step-by-Step Interactive Training and Internet Explorer's handling of ActiveX objects.

Details:

This is a maintenance release for Sourcefire VRT rules. Numerous references have been added to existing rules and rule documentation has been updated. Along with this maintenance release, new rules have been added to address exploit attempts against Microsoft Step-by-Step Interactive Training and an additional attack vector against Internet Explorer's handling of ActiveX objects.

A vulnerability exists in Microsoft Step-by-Step Interactive Training that may allow an attacker to run code of their choosing on a vulnerable client.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 4194 through 4196.

Multiple vulnerabilities exist in Microsoft Internet Explorer that may allow an attacker to execute code of their choosing on a vulnerable system. This can be achieved by manipulating the trust between Internet Explorer and ActiveX objects.

A rule to detect attacks against these vulnerabilities is included in this rule pack and is identified as sid 4197.

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 network security industry.

Posted by on Sep 27, 2005



VRT Rules 2005-09-26

Sourcefire VRT Certified Rules Update

Date: 2005-09-26

Synopsis:

The Sourcefire Vulnerability Research Team (VRT) has made numerous rule reference additions and documentation improvements as well as adding new rules to detect attempts to exploit vulnerabilities in Microsoft Step-by-Step Interactive Training and Internet Explorer's handling of ActiveX objects.

Details:

This is a maintenance release for Sourcefire VRT rules. Numerous references have been added to existing rules and rule documentation has been updated. Along with this maintenance release, new rules have been added to address exploit attempts against Microsoft Step-by-Step Interactive Training and an additional attack vector against Internet Explorer's handling of ActiveX objects.

A vulnerability exists in Microsoft Step-by-Step Interactive Training that may allow an attacker to run code of their choosing on a vulnerable client.

Rules to detect attacks against this vulnerability are included in this rule pack and are identified as sids 4194 through 4196.

Multiple vulnerabilities exist in Microsoft Internet Explorer that may allow an attacker to execute code of their choosing on a vulnerable system. This can be achieved by manipulating the trust between Internet Explorer and ActiveX objects.

A rule to detect attacks against these vulnerabilities is included in this rule pack and is identified as sid 4197.

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 network security industry.

Posted by on Sep 26, 2005



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