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TITLE:
dproxy-nexgen "dns_decode_reverse_name" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA24688

VERIFY ADVISORY:
http://secunia.com/advisories/24688/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
dproxy-nexgen
http://secunia.com/product/13834/

DESCRIPTION:
mu-b has discovered a vulnerability in dproxy-nexgen, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the
"dns_decode_reverse_name()" function in dns_decode.c and can be
exploited to cause a stack based buffer overflow via a specially
crafted packet sent to port 53.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in the latest available version
(2007-04-02). Other versions may also be affected.

SOLUTION:
Use the software only in a trusted network environment.

PROVIDED AND/OR DISCOVERED BY:
mu-b

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/053289.html

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