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TITLE:
MDaemon WorldClient Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA30474

VERIFY ADVISORY:
http://secunia.com/advisories/30474/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
MDaemon 9.x
http://secunia.com/product/10271/

DESCRIPTION:
securfrog has discovered some vulnerabilities in MDaemon, which can
be exploited by malicious people to cause a DoS (Denial of Service)
and by malicious users to potentially compromise a vulnerable
system.

1) A NULL-pointer dereference error exists in the processing of HTTP
requests sent to the WordClient interface (listening on TCP port 3000
by default). This can be exploited to crash the WordClient service by
sending a specially crafted HTTP POST request to WorldClient.dll.

2) A boundary error exists in the WordClient interface when
processing "Reply" requests with e.g. an overly long "Subject" field.
This can be exploited to cause a stack-based buffer overflow via a
specially crafted email sent from the WordClient interface.

Successful exploitation may allow execution of arbitrary code, but
requires a valid email account on the affected server.

The vulnerabilities are confirmed in version 9.6.5. Other versions
may also be affected.

SOLUTION:
Restrict access to the WordClient interface.

PROVIDED AND/OR DISCOVERED BY:
securfrog

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/5727

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About:
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http://secunia.com/about_secunia_advisories/


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