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Secunia Research: MailEnable IMAP Service Buffer Overflow Vulnerability

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                     Secunia Research 11/12/2006

      - MailEnable IMAP Service Buffer Overflow Vulnerability -

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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 Professional Edition Version 2.35.

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Highly Critical
Impact: System Access
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 a vulnerability in MailEnable, which
can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error when processing
data sent to the IMAP server. This can be exploited to cause a
stack-based buffer overflow by first sending a command in the "Not
Authenticated" state (e.g. "login" command) with a specially crafted
parameter to make the IMAP service wait for more incoming data and
then sending an overly long string (greater than 512 bytes).

Successful exploitation allows execution of arbitrary code.

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5) Solution 

Apply hotfix ME-10025:
http://www.mailenable.com/hotfix/ME-10025.EXE

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6) Time Table 

08/12/2006 - Vendor notified.
08/12/2006 - Vendor response with hotfix information.
11/12/2006 - Public disclosure.

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7) Credits 

Discovered by JJ Reyes, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2006-6423 for the vulnerability.

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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://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/

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://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-73/

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

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