[SA18486] Dual DHCP DNS Server DHCP Options Buffer Overflow

TITLE:
Dual DHCP DNS Server DHCP Options Buffer Overflow

SECUNIA ADVISORY ID:
SA18486

VERIFY ADVISORY:
http://secunia.com/advisories/18486/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From local network

SOFTWARE:
Dual DHCP DNS Server 1.x
http://secunia.com/product/6868/

DESCRIPTION:
Luigi Auriemma has reported a vulnerability in Dual DHCP DNS Server,
which can be exploited by malicious people to cause a DoS (Denial of
Service) and potentially compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the handling
of the DHCP options field. This can be exploited to cause a buffer
overflow which crashes the service and may allow arbitrary code
execution.

The vulnerability has been reported in version 1.0. Prior versions
may also be affected.

SOLUTION:
The vulnerability has been fixed in version 1.1 for Windows.
http://sourceforge.net/project/showfiles.php?group_id=132995

A fix is not currently available for the Linux version.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/dualsbof-adv.txt

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