TITLE:
Mercury Mail Transport System Buffer Overflow

SECUNIA ADVISORY ID:
SA18611

VERIFY ADVISORY:
http://secunia.com/advisories/18611/

CRITICAL:
Extremely critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Mercury Mail Transport System 3.x
http://secunia.com/product/1997/
Mercury Mail Transport System 4.x
http://secunia.com/product/4348/

DESCRIPTION:
kcope has discovered a vulnerability in Mercury Mail Transport
System, which can be exploited by malicious people to compromise a
vulnerable system.

The vulnerability is caused due to a boundary error in the request
handling in the "MercuryH PH Directory Server" protocol module. This
can be exploited to cause a buffer overflow by sending overly long
data to port 105/tcp.

Successful exploitation allows execution of arbitrary code.

NOTE: Exploit code is publicly available.

The vulnerability has been confirmed in version 4.01b. Other versions
may also be affected.

SOLUTION:
Disable the "MercuryH PH Directory Server" protocol module (this may
affect functionality).

Restrict traffic to port 105/tcp on affected systems.

PROVIDED AND/OR DISCOVERED BY:
kcope

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About:
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