TITLE:
FreeRADIUS EAP-MSCHAPv2 Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA19300

VERIFY ADVISORY:
http://secunia.com/advisories/19300/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
FreeRADIUS 1.x
http://secunia.com/product/3921/

DESCRIPTION:
A vulnerability has been reported in FreeRADIUS, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an input validation error in the
EAP-MSCHAPv2 state machine. This can be exploited by manipulating the
EAP-MSCHAPv2 state machine on a radius client to bypass server
authentication checks and cause the server to crash.

The vulnerability has been reported in version 1.0.0 through 1.1.0.

SOLUTION:
Update to version 1.1.1.
http://www.freeradius.org/getting.html

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Steffen Schuster.

ORIGINAL ADVISORY:
http://www.freeradius.org/security.html

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