Secunia Research: MailEnable SMTP Service Two Denial of Service Vulnerabilities

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                 Secunia Research 13/09/2010

• MailEnable SMTP Service Two Denial of Service Vulnerabilities -

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Table of Contents

Affected Software…1
Severity…2
Vendor's Description of Software…3
Description of Vulnerability…4
Solution…5
Time Table…6
Credits…7
References…8
About Secunia…9
Verification…10

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1) Affected Software

• MailEnable 4.25 Standard, Professional, and Enterprise Editions.

NOTE: Other versions may also be affected.

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2) Severity

Rating: Moderately critical
Impact: Denial of Service
Where: From remote

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3) Vendor's Description of Software

"MailEnable's mail server software provides a powerful, scalable
hosted messaging platform for Microsoft Windows. MailEnable offers
stability, unsurpassed flexibility and an extensive feature set which
allows you to provide cost-effective mail services."

Product Link:
http://www.mailenable.com/default.asp

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in MailEnable,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

1) An insufficient length check when appending data to a predefined
log message into a buffer using strcat_s() may result in an unhandled
invalid parameter error. This can be exploited to crash the SMTP
service (MESMTPC.exe) via an overly long email address in the "MAIL
FROM" command.

2) An insufficient length check when copying data with a predefined
log message into a buffer using strcpy_s() may result in an unhandled
invalid parameter error. This can be exploited to crash the SMTP
service (MESMTPC.exe) via an overly long domain name in the "RCPT TO"
command.

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5) Solution

Update to version 4.26 or apply hotfix ME-10044.

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6) Time Table

03/09/2010 - Requested security contact from the vendor.
04/09/2010 - Vendor response.
06/09/2010 - Vulnerability details provided to the vendor.
08/09/2010 - Vendor provides fixed version.
10/09/2010 - Secunia Research confirms fixes.
13/09/2010 - Vendor releases fixed version.
13/09/2010 - Public disclosure

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7) Credits

Discovered by Dmitriy Pletnev, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2010-2580 for the vulnerabilities.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
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http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-112/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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