Secunia Research: MailEnable Buffer Overflow and Directory Traversal Vulnerabilities

[Secunia Research <vuln () secunia com>]

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                     Secunia Research 18/11/2005

- MailEnable Buffer Overflow and Directory Traversal Vulnerabilities -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

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1) Affected Software 

* MailEnable Professional version 1.6 with Hotfix
  MEIMAPS-UPD0511010000.zip applied.

* MailEnable Enterprise version 1.1 with Hotfix
  MEIMAPS-UPD0511010000.zip applied.

Prior versions may also be affected.

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2) Severity 

Rating: Moderately Critical
Impact: System access
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered some vulnerabilities in Mail Enable
Professional/Enterprise, which can be exploited by malicious users to
cause a DoS (Denial of Service) and to compromise a vulnerable system.

1) A boundary error exists in the IMAP service (MEIMAPS.EXE) when
handling an overly long mailbox name passed to "select", "create",
"delete", "rename", "subscribe", and "unsubscribe" commands. This can
be exploited by a malicious user to cause a stack-based buffer
overflow and allows arbitrary code execution.

2) Directory traversal error exists in the IMAP service (MEIMAP.EXE)
when handling specially crafted mailbox name passed to the "create"
and "rename" commands. This can be exploited by a malicious user to
create arbitrary directories on the server, or to cause a DoS by
renaming the mail directories of other users.

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4) Solution 

Apply cumulative update (ME-10008):
http://www.mailenable.com/hotfix/ME-10008.EXE

The vulnerabilities have also been fixed in MailEnable Professional
Edition version 1.7.

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5) Time Table 

07/11/2005 - Initial vendor notification.
08/11/2005 - Initial vendor reply.
18/11/2005 - Vendor released patches.
18/11/2005 - Public disclosure.

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6) Credits 

Discovered by Tan Chew Keong, Secunia Research.

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7) References

MailEnable:
http://www.mailenable.com/hotfix/

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8) About Secunia 

Secunia collects, validates, assesses, and writes advisories regarding 
all the latest software vulnerabilities disclosed to the public. These 
advisories are gathered in a publicly available database at the 
Secunia website: 

http://secunia.com/

Secunia offers services to our customers enabling them to receive all 
relevant vulnerability information to their specific system 
configuration. 

Secunia offers a FREE mailing list called Secunia Security Advisories: 

http://secunia.com/secunia_security_advisories/

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-59/advisory/

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

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