Using the Fluhrer, Mantin, and Shamir Attack to Break WEP

[aleph1 () securityfocus com]

Using the Fluhrer, Mantin, and Shamir Attack to Break WEP
Adam Stubblefield, John Ioannidis, Avial D. Rubin

We implemented an attack against WEP, the link-layer security protocol
for 802.11 networks. The attack was described in a recent paper by Fluhrer,
Mantin, and Shamir. With our implementation, and permission of the network
administrator, we were able to recover the 128 bit secure key used in a
production network, with a passive attack. The WEP standard uses RC4 IVs
improperly, and the attack exploits this design failure. This paper describes
the attack, how we implemented it, and some optimizations to make the
attack more efficient. We conclude that 802.11 WEP is totally insecure, and
we provide some recommendations.

http://www.cs.rice.edu/~astubble/wep_attack.pdf

-- 
Elias Levy
SecurityFocus.com
http://www.securityfocus.com/
Si vis pacem, para bellum

----------------------------------------------------------------------------
This list is provided by the SecurityFocus Security Intelligence Alert (SIA)
Service. For more information on SecurityFocus' SIA service which
automatically alerts you to the latest security vulnerabilities please see:
https://alerts.securityfocus.com/