-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

(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

Vulnerability Class: Design flaw

Release Date: 2007-07-04

Affected Platforms:

• 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

Severity: High

Author: Andres Riancho

Vendor Status:

• Confirmed, updates released.

Reference to Vulnerability Disclosure Policy:

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

Product Overview:

"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:

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

Technical Details:

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:

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

Solutions:

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:

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

Contact Information:

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: [email protected]
PGP key: http://www.cybsec.com/pgp/ariancho.txt
Tel/Fax: [54 11] 4371-4444
Web: http://www.cybsec.com

---

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGlMsB1351/apVCtIRArLwAJ9ntxG9m3NXMtEsue4NyukuujQetACfdRgJ
d0RW2DQcKlpmc97RhmhSt0U=
=gwf5
-----END PGP SIGNATURE-----