MailEnable Professional Edition 2.32 Denial of Service / System Compromise

MailEnable Professional Edition 2.32 was susceptible to a critical Denial MailEnable Professional Edition 2.32 was susceptible to a critical Denial of Service (DoS) and potential System Compromise vulnerability (CVE-2005-2365).

The flaw was a buffer overflow located within the SMTP service. Remote attackers could exploit this by sending a specially crafted "MAIL FROM" command containing an excessively long email address.

This malicious input would trigger the buffer overflow, causing the MailEnable SMTP service to crash, resulting in a Denial of Service. More severely, successful exploitation could potentially allow for arbitrary code execution, granting the attacker control over the underlying system with the privileges of the MailEnable service. This presented a significant risk of full system compromise. Users were urged to upgrade to a patched version to address this critical security vulnerability.

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Secunia Research 30/11/2006

- MailEnable IMAP Service Two 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 Professional Edition Version 2.32.

NOTE: Other versions may also be affected.

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2) Severity

Rating: Moderately Critical
Impact: System Access
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 users to cause a DoS (Denial of
service) or compromise a vulnerable system.

1) A boundary error in the handling of arguments passed to the EXAMINE
and SELECT commands within the IMAP service (MEIMAPS.EXE) can be
exploited to cause a stack-based buffer overflow via an overly long
argument.

Successful exploitation allows execution of arbitrary code.

2) An input validation error in the handling of arguments passed to
the DELETE command within the IMAP service (MEIMAPS.EXE) can be
exploited to cause a stack overflow and crash the service by sending
an overly long argument consisting of "*" or "?" characters.

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5) Solution

Apply hotfix ME-10020:
http://www.mailenable.com/hotfix/ME-10020.ZIP

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6) Time Table

27/11/2006 - Vendor notified.
30/11/2006 - Vendor response with hotfix information.
30/11/2006 - Public disclosure.

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7) Credits

Discovered by JJ Reyes, Secunia Research.

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8) References

N/A

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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/2006-71/

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

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