[SA19966] Hostapd EAPoL Frame Handling Denial of Service

TITLE:
Hostapd EAPoL Frame Handling Denial of Service

SECUNIA ADVISORY ID:
SA19966

VERIFY ADVISORY:
http://secunia.com/advisories/19966/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
Hostapd 0.x
http://secunia.com/product/9736/

DESCRIPTION:
Matteo Rosi has reported a vulnerability in Hostapd, which
potentially can be exploited by malicious people to cause a DoS
(Denial of Service).

The vulnerability is caused due to an error within the handling of
the key_data_length field of an EAPoL frame. This can be exploited to
crash the hostapd daemon via a specially crafted EAPoL frame with an
overly large value in the length field.

The vulnerability has been reported in version 0.3.7. Other versions
may also be affected.

SOLUTION:
Update to version 0.3.9 or later.
http://hostap.epitest.fi/hostapd/

PROVIDED AND/OR DISCOVERED BY:
Matteo Rosi

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=365897

About:
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vulnerabilities.

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