Technical Description

Multiple vulnerabilities have been identified in MadWifi, which could be exploited by attackers to cause a denial of service or disclose sensitive information.

The first issue is due to an error in the "ieee80211_input()" [net80211/ieee80211_input.c] function when processing certain AUTH frames, which could be exploited by attackers to crash an affected system, creating a denial of service condition.

The second vulnerability is due to an error when processing Channel Switch Announcement Information Elements (CSA IEs), which could be exploited by attackers to cause a loss of communication via a Channel Switch Count less than or equal to one.

The third issue is due to an error in the "ieee80211_encap()" [net80211/ieee80211_output.c] function, which could cause unencrypted packets to be sent before WPA authentication succeeds and could allow remote attackers to obtain sensitive information (e.g. network structure), or potentially conduct denial of sevice and spoofing attacks.

The fourth issue is due to an error in the "ieee80211_input()" function when processing malformed packets while Ad-Hoc mode is used, which could be exploited by attackrs to crash a vulnerable system.

The fifth vulnerability is due to a race condition between interface enabling and packet transmission in the "ath_rate_sample()" [ath_rate/sample/sample.c] function, which could be exploited by attackers to cause a denial of service.

Affected Products

MadWifi versions prior to 0.9.3

Solution

Upgrade to MadWifi version 0.9.3 :
http://sourceforge.net/projects/madwifi/

References

http://www.vupen.com/english/advisories/2007/1187
http://madwifi.org/wiki/Releases/0.9.3
http://madwifi.org/ticket/287
http://madwifi.org/ticket/880
http://madwifi.org/ticket/963
http://madwifi.org/ticket/967

Credits

Vulnerabilities reported by the vendor

ChangeLog

2007-04-02 : Initial release

Vulnerability Management

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