VRT Advisories

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VRT Rules 2007-04-26

Sourcefire VRT Update

Date: 2007-04-27

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting IBM Lotus Domino servers and hosts using Novell GroupWise WebAccess.

Details:

IBM Lotus Domino Denial of Service (CVE-2007-1675):
IBM Lotus Domino servers are prone to a Denial of Service (DoS) attack via a buffer overflow condition in the CRAM-MD5 authentication module.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 11004.

Novell GroupWise WebAccess buffer overflow (CVE-2007-2171):
The Novell GroupWise WebAccess application is vulnerable to a buffer overflow condition that may allow a remote attacker to execute code on a vulnerable system.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 10998.

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 26, 2007



VRT Rules 2007-04-17

Sourcefire VRT Update

Date: 2007-04-17

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft DNS Server Service. This release enhances the detection capabilities for this vulnerability.

Details:

Microsoft Security Advisory (935964):
Microsoft DNS Server Service is prone to a vulnerability that may allow a remote attacker to execute code on an affected system. This issue is present in the RPC interface of servers using Microsoft's implementation of DNS.

In order to detect attacks targeting this vulnerability, the DCE/RPC preprocessor must be configured to use 'autodetect'. This is the default behavior for the preprocessor.

The Sourcefire VRT has continued research into this issue. As a result, this release provides improved detection for attacks targeting this vulnerability.

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 17, 2007



VRT Rules 2007-04-16

Sourcefire VRT Update

Date: 2007-04-16

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft DNS Server Service. This release enhances the detection capabilities for this vulnerability.

Details:

Microsoft Security Advisory (935964):
Microsoft DNS Server Service is prone to a vulnerability that may allow a remote attacker to execute code on an affected system. This issue is present in the RPC interface of servers using Microsoft's implementation of DNS.

In order to detect attacks targeting this vulnerability, the DCE/RPC preprocessor must be configured to use 'autodetect'. This is the default behavior for the preprocessor.

This release provides updated detection for this vulnerability.

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 16, 2007



VRT Rules 2007-04-13

Sourcefire VRT Update

Date: 2007-04-13

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft DNS Server Service.

Details:

Microsoft Security Advisory (935964):
Microsoft DNS Server Service is prone to a vulnerability that may allow a remote attacker to execute code on an affected system. This issue is present in the RPC interface of servers using Microsoft's implementation of DNS.

In order to detect attacks targeting this vulnerability, the dcerpc preprocessor must be configured to use 'autodetect'. This is the default behavior for the preprocessor.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 10518 through 10697

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 13, 2007



VRT Rules 2007-04-10

Sourcefire VRT Update

Date: 2007-04-10

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting hosts using the Microsoft UPnP service and the Microsoft Agent.

Details:

Microsoft Security Bulletin (MS07-019):
Microsoft Universal Plug and Play does not correctly handle malformed HTTP requests. This may allow an attacker to overflow a 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 10475.

Microsoft Security Bulletin (MS07-020):
Microsoft Agent does not correctly handle malformed URLs. This may allow an attacker to cause a buffer overflow condition to occur and subsequently, execute code on an affected system.

Previously released rules will generate events when attempts are made to exploit this condition. These rules are identified as SIDs 4172 and 8846 through 8856. In addition, new rules are included in this release to detect attacks targeting this vulnerability and are identified as SIDs 10465 and 10474.

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 10, 2007



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