VRT Advisories

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VRT Rules 2007-10-09

Sourcefire VRT Rules Update

Date: 2007-10-09

Synopsis:

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

Details:

Microsoft Security Bulletin MS07-055:
Kodak Image Viewer contains a flaw that may allow a remote attacker to execute code via a specially crafted image file.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 12631 through 12634.

Microsoft Security Bulletin MS07-056:
Microsoft Outlook Express and Windows Mail for Vista contain a programming error that may allow a remote attacker to execute code on an affected host via an NNTP server response.

A shared object rule to detect attacks targeting this vulnerability is included in this release and is identified as GID 3 SID 12636.

Microsoft Security Bulletin MS07-057:
Microsoft Internet Explorer does not correctly handle errors encountered when handling file download queues. This may allow a remote attacker to execute code on a vulnerable host.

Previously released rules identified as SIDs 10504 and 10505 will generate events on attempts to exploit this vulnerability. Additionally, a rule to detect other attack vectors targeting this vulnerability is included in this release and is identified as SID 12630.

Microsoft Security Bulletin MS07-058:
Microsoft Windows systems using RPC may be vulnerable to a Denial of Service (DoS) condition that occurs when a malformed authentication request is transmitted to an affected host.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12635.

Microsoft Security Bulletin MS07-059:
Microsoft Windows SharePoint Services and Microsoft Office SharePoint Server suffer from a programming error that may allow an attacker to execute code and escalate privileges on an affected system.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12629.

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 Oct 09, 2007



VRT Rules 2007-10-02

Sourcefire VRT Rules Update

Date: 2007-10-02

Synopsis:

The Sourcefire VRT is aware of a vulnerability in Computer Associates BrightStor ARCserve Backup for Laptops and Desktops.

Details:

Computer Associates BrightStor ARCserve buffer overflow (CVE-2007-5003):
Computer Associates BrightStor ARCserve Backup contains multiple errors that may allow a remote attacker to cause a buffer overflow condition to occur. The attacker may be presented with the opportunity to execute code on an affected host.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12596.

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 Oct 02, 2007



VRT Rules 2007-09-25

Sourcefire VRT Rules Update

Date: 2007-09-25

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Firefox, ClamAV and the Apache HTTP Server.

Details:

Firefox QuickTime Argument Injection (CVE-2007-5045):
A remote attacker may be able to execute commands via a QuickTime Media Link (QTL) file on systems using Firefox prior to version 2.0.7.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12593.

ClamAV Command Execution (CVE-2007-4560):
The clamav-milter used in ClamAV prior to version 0.91.2 when run in black hole mode, may allow a remote attacker to execute commands via shell meta-characters.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12592.

Apache HTTP Server Denial of Service (CVE-2007-1863):
The Apache HTTP Server (httpd), when caching is enabled and a threaded Multi-Processing Module (MPM) is used, is vulnerable to a Denial of Service (DoS) condition via a request using certain Cache-Control headers.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12591.

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 25, 2007



VRT Rules 2007-09-17

Sourcefire VRT Rules Update

Date: 2007-09-17

Synopsis:

This release provides two new rule groupings, Voice over IP (VoIP) rules and Content-Replace rules.

Details:

This group contains rules that are concerned with Voice over IP (VoIP) detection. This rule group focuses on known exploit attempts as well as providing detection for anomalous events.

Voice over IP rules:
This group contains rules that are concerned with Voice over IP (VoIP) detection.

Content-Replace rules:
This group contains rules that concentrate on replacing transaction data with innocuous strings to effectively deny a valid transaction while keeping a connection active. This allows a deployment where instant messaging may be allowed for communication purposes but where file transfer is prohibited.

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, 2007



VRT Rules 2007-09-11

Sourcefire VRT Rules Update

Date: 2007-09-11

Synopsis:

The Sourcefire VRT is aware of vulnerabilities affecting Microsoft Agent, Microsoft Visual Studio and Microsoft MSN Messenger.

Details:

Microsoft Security Bulletin MS07-051:
Microsoft Agent contains a vulnerability that may allow a remote attacker to compromise a host. The agent fails to correctly process Uniform Resource Locators (URL) which may present the attacker with the opportunity to execute code.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12454.

Additionally, SID 1437 may generate events for attacks targeting this vulnerability.

Microsoft Security Bulletin MS07-052:
Some versions of Microsoft Visual Studio include a custom version of Crystal Reports that contains a vulnerability that may allow an attacker to execute code on a host. An attacker may use a specially crafted RPT file to compromise an affected system.

Rules to detect attacks targeting this vulnerability are included in this release and are identified as SIDs 12455 and 12456.

Microsoft Security Bulletin MS07-054:
MSN Messenger and Windows Live Messenger contain remote code execution vulnerabilities that may be exploited by an attacker via a video chat invitation.

A rule to detect attacks targeting this vulnerability is included in this release and is identified as SID 12457.

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 11, 2007



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