TITLE:
Neon Responders "Clock Synchronisation" Packet Denial of Service

SECUNIA ADVISORY ID:
SA19702

VERIFY ADVISORY:
http://secunia.com/advisories/19702/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
Neon Responders 5.x
http://secunia.com/product/9455/

DESCRIPTION:
Stefan Lochbihler has reported a vulnerability in Neon Responders,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an unspecified error when
processing "Clock Synchronisation" packets and can be exploited via a
specially crafted packet to crash the process.

The vulnerability has been reported in version 5.4 for Windows. Other
versions may also be affected.

SOLUTION:
Restrict access to port 4347/tcp.

PROVIDED AND/OR DISCOVERED BY:
Stefan Lochbihler

ORIGINAL ADVISORY:
http://www.xion-security.at/files/adv/neonresponder_01.txt

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