TippingPoint detection bypass

From: Andres Riancho <ariancho(at)cybsec.com>
Date: Wed Jul 11 2007 - 08:20:19 EDT

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(The following advisory is also available in PDF format for download at: http://www.cybsec.com/vuln/CYBSEC-Security_Pre-Advisory_3Com_TippingPoint_IPS_Detection_Bypass_2.pdf )    

CYBSEC S.A.
www.cybsec.com    

Pre-Advisory Name: TippingPoint detection bypass

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Vulnerability Class: Design flaw

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Release Date: 2007-07-04

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Affected Platforms:

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• TippingPoint IPS running TOS versions 2.1.x, 2.2.x prior to 2.2.5, and 2.5.x prior to 2.5.2

Local / Remote: Remote

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Severity: High

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Author: Andres Riancho

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Vendor Status:

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• Confirmed, updates released.

Reference to Vulnerability Disclosure Policy:

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http://www.cybsec.com/vulnerability_policy.pdf  

Product Overview:

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"The TippingPoint Intrusion Prevention System (IPS) is an award-winning security solution that blocks worms, viruses, Trojans, Denial of Service and Distributed Denial of Service attacks, Spyware, VoIP threats, and
Peer-to-Peer threats. Inspecting traffic through Layer 7, the IPS blocks malicious traffic before damage occurs."  

Vulnerability Description:

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When IP packets are fragmented in a special way, the appliance fails to correctly reassemble the data stream.  

Technical Details:

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Technical details will be released 30 days after publication of this pre-advisory.
This was agreed upon with TippingPoint to allow their customers to upgrade affected software prior to technical knowledge been publicly available.  

Impact:

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Exploiting this vulnerability, an attacker would be able to bypass all filters and detection.  

Solutions:

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TippingPoint has released a new version of the TippingPoint OS to address this vulnerability. Customers
should apply the new firmware immediately. More information can be found at
http://www.3com.com/securityalert/alerts/3COM-07-002.html    

Vendor Response:

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• 2006-02-06: Initial Vendor Contact.
• 2006-06-20: Vendor Confirmed Vulnerability.
• 2007-07-04: Vendor Releases Update.

Contact Information:

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For more information regarding the vulnerability feel free to contact the author at ariancho {at} cybsec.com.  

For more information regarding CYBSEC: www.cybsec.com (c) 2006 - CYBSEC S.A. Security Systems

• --
• ---------------------------- Andres Riancho CYBSEC S.A. Security Systems E-mail: ariancho@cybsec.com PGP key: http://www.cybsec.com/pgp/ariancho.txt Tel/Fax: [54 11] 4371-4444 Web: http://www.cybsec.com
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