Clemens Kolbitsch and Sylvester Keil have reported a vulnerability in MadWifi, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the processing of beacon frames. This can be exploited via a specially crafted beacon frame with an overly large "length" value (greater than 15) in the extended supported rates element ("xrates").
Successful exploitation causes the driver to exit and results in a kernel panic.
The vulnerability is reported in version 0.9.3.2. Other versions may also be affected.
Solution: Update to version 0.9.3.3.
Provided and/or discovered by: Clemens Kolbitsch and Sylvester Keil, Secure Systems Lab / SEC Consult
Original Advisory: MadWifi:
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Subject: MadWifi "xrates" Element Denial of Service
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