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Arrow  Topic :

Alcatel-Lucent OmniSwitch products, Stack Buffer Overflow


Arrow  SecurityAlert : 4347
Arrow  CVE : CVE-2008-4383
Arrow  CWE : CWE-119
Arrow  SecurityRisk : High  Security Risk High  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : No
Arrow  Exploit Available : No
Arrow  Credit : dh layereddefense com
Arrow  Published : 07.10.2008

Arrow  Affected Software : Alcatel-Lucent OmniSwitch products,



Arrow  Advisory Content :  

==================================================

Layered Defense Research Advisory 12 August 2008

==================================================

1) Affected Product

Alcatel-Lucent OmniSwitch products

OS7000

OS6600

OS6800

OS6850

OS9000

==================================================

2) Severity Rating:

critical

Impact: Remotely exploitable without authentication.

==================================================

3) Description of Vulnerability

A stack based buffer overflow was discovered within Alcatel OmniSwitch
product line.

This buffer overflow was discovered within the Agranet-Emweb embedded
management web server and can be exploited remotely without user
authentication.

The vulnerability can be triggered on a 6200-24 running AOS Version
5.4.1.396.R01 by sending 2392 bytes in the http header ?Cookie: Session=?
This appears to overwrite a return address on the stack giving the attacker
control of the instruction pointer. The amount of bytes needed to trigger
the overflow varies between AOS versions.

==================================================

4) Solution

Fix:

1. Install AOS upgrades as recommended by Vendor

2. Disable Web services on OmniSwitch products

==================================================

5) Time Table:

05/21/2008 Reported Vulnerability to Vendor.

06/27/2008 Vendor acknowledged the vulnerability

08/06/2008 Vendor published hot fix

==================================================

6) Credits Discovered by Deral Heiland, www.LayeredDefense.com

==================================================

7) Reference

http://www1.alcatel-lucent.com/psirt/statements/2008002/OmniSwitch.htm

https://wws.cert-ist.com/fast-cgi/AV/Details.cgi?lang=eng&action=1&forma
t=3&ref=CERT-IST/AV-2008.333

==================================================

8) About Layered Defense Layered Defense, Is a group of security
professionals that work together on ethical Research, Testing and Training
within the information security arena. http://www.layereddefense.com

==================================================



Arrow  References :

http://www1.alcatel-lucent.com/psirt/statements/2008002/OmniSwitch.htm
http://www.securitytracker.com/id?1020657
http://www.securityfocus.com/archive/1/archive/1/495343/100/0/threaded
http://www.layereddefense.com/alcatel12aug.html
http://secunia.com/advisories/31435




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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