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TITLE:
BusinessMail SMTP Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA16306

VERIFY ADVISORY:
http://secunia.com/advisories/16306/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
NetCPlus BusinessMail 4.x
http://secunia.com/product/5464/

DESCRIPTION:
Reed Arvin has discovered a vulnerability in BusinessMail, which can
be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the SMTP service, and
can be exploited to cause the service to stop responding via an
overly long user name in the "MAIL FROM" command.

The vulnerability has been confirmed in BusinessMail version 4.6
(SMTP server 4.61.02). Other versions may also be affected.

SOLUTION:
Filter overly long user names using a SMTP gateway proxy.

PROVIDED AND/OR DISCOVERED BY:
Reed Arvin

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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http://secunia.com/about_secunia_advisories/


Please Note:
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Secunia NEVER sends attached files with advisories.
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