TITLE:
DeleGate DNS Query Handling Denial of Service

SECUNIA ADVISORY ID:
SA19750

VERIFY ADVISORY:
http://secunia.com/advisories/19750/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
DeleGate 8.x
http://secunia.com/product/1237/

DESCRIPTION:
A vulnerability has been reported in DeleGate, which 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
malformed DNS query packets. This can lead to out-of-bounds memory
accesses and infinite recursive function calls, which causes the
process to stop responding to requests.

The vulnerability has been reported in version 8.11.5 and prior
(stable), and in version 9.0.5 and prior (development).

SOLUTION:
Update to version 8.11.6 or later.
http://www.delegate.org/delegate/download/

The vulnerability has also been fixed in development version 9.0.6.

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor based on DNS Test Tool created by Oulu University
Secure Programming Group.

ORIGINAL ADVISORY:
NISCC:
http://www.niscc.gov.uk/niscc/docs/re-20060425-00312.pdf?lang=en

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