FreeRADIUS: heap exploit and NULL pointer dereference vulnerability

FreeRADIUS: heap exploit and NULL pointer dereference vulnerability FreeRADIUS is vulnerable to a heap exploit and a NULL pointer dereference vulnerability. FreeRADIUS 2003-11-23 2003-11-23: 01 33989 remote 0.9.3 0.9.2

FreeRADIUS is a popular open source RADIUS server.

FreeRADIUS versions below 0.9.3 are vulnerable to a heap exploit, however, the attack code must be in the form of a valid RADIUS packet which limits the possible exploits.

Also corrected in the 0.9.3 release is another vulnerability which causes the RADIUS server to de-reference a NULL pointer and crash when an Access-Request packet with a Tunnel-Password is received.

A remote attacker could craft a RADIUS packet which would cause the RADIUS server to crash, or could possibly overflow the heap resulting in a system compromise.

There is no known workaround at this time.

Users are encouraged to perform an 'emerge sync' and upgrade the package to the latest available version - 0.9.3 is available in portage and is marked as stable.


    # emerge sync
    # emerge -pv '>=net-dialup/freeradius-0.9.3'
    # emerge '>=net-dialup/freeradius-0.9.3'
    # emerge clean

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