A vulnerability has been reported in hostapd, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to a boundary error within the "eap_server_tls_process_fragment()" function (eap_server/eap_server_tls_common.c) when handling fragment data within TLS messages. This can be exploited to cause a buffer overflow and crash the service via a specially crafted EAP-TLS message.
Successful exploitation requires that hostapd is configured to use the internal EAP authentication server.
The vulnerability is reported in versions 0.6 through 1.0.
Solution: Fixed in the GIT repository.
Provided and/or discovered by: Timo Warns, PRESENSE Technologies.
Original Advisory: PRESENSE Technologies (PRE-SA-2012-07):
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Subject: hostapd EAP-TLS Message Handling Denial of Service Vulnerability
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