[Full-disclosure] [MU-200603-01] MailEnable POP3 Pre-Authentication Buffer Overflow

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MailEnable POP3 Pre-Authentication Buffer Overflow [MU-200603-01]
March 20, 2006


Affected Product / Versions:

MailEnable Professional 1.7, 1.71, 1.72
MailEnable Standard 1.91, 1.92
MailEnable Enterprise 1.2
MailEnable 2.0 betas

Product Overview:

"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."

Vulnerability Details:

A remote buffer overflow condition in MailEnable's POP3 service could
allow for arbitrary code execution. The vulnerable code can be
exercised remotely without authentication.

A second less critical bug was also reported and remedied. The bug
involved a cryptographic implementation mistake that weakened
authentication security.

Vendor Response / Solution:

Hotfix solution to this advisory:

All hotfixes are available from:

All versions have been updated to include the hotfix:

Mu Security would like to thank MailEnable in advance for timely
remediation of these vulnerabilities.


This vulnerability was discovered by the Mu Security research team.


Mu Security is an early-stage innovator creating a new class of
security analysis system. The company's mission is to widely deploy
security analysis and reduce product and application vulnerabilities.
Mu's founders include industry-recognized experts in the IDP, open
source protocol analysis tools, ethical hacking, and network
management markets The security analysis process and product solution
provide a rigorous and streamlined methodology for verifying and
improving the security readiness of any IP-based product or
application. Mu Security, headquartered in Sunnyvale, California, is
backed by preeminent venture capital firms including Accel Partners
and Benchmark Capital.

The information within this paper may change without notice. Use of
this information constitutes acceptance for use in an AS IS
condition. There are no warranties, implied or express, with regard
to this information. In no event shall the author be liable for any
direct or indirect damages whatsoever arising out of or in connection
with the use or spread of this information. Any use of this
information is at the user's own risk.

Version: GnuPG v1.4.2 (Darwin)


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