Novell NetMail IMAPD subscribe Buffer Overflow Vulnerability

iDefense Security Advisory 12.23.06
http://labs.idefense.com/intelligence/vulnerabilities/
Dec 23, 2006

I. BACKGROUND

Novell NetMail is an e-mail and calendar system that is based on standard
Internet protocols.

More information can be found at the vendors site:

http://www.novell.com/products/netmail/

II. DESCRIPTION

Remote exploitation of a buffer overflow vulnerability in Novell Inc.'s
NetMail IMAP daemon allows authenticated attackers to execute arbitrary
code with the privileges of the underlying user.

Once logged in, attackers can execute the "subscribe" command with an
overly long argument string to overflow a stack based buffer.

III. ANALYSIS

Exploitation allows authenticated remote attackers to execute arbitrary
code with the privileges of the underlying user.

IV. DETECTION

iDefense has confirmed the existence of the vulnerability in version 3.52d
of Novell NetMail.  It is suspected that earlier versions of NetMail are
also affected.

V. WORKAROUND

iDefense is currently unaware of any effective workaround for this issue.

VI. VENDOR RESPONSE

Novell has addressed this vulnerability in version 3.52e FTF2 of NetMail.
For more information consult Novell TID 3717068.  This document is
available at the following link.

http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=3717068&sliceId=SAL_Public&dialogID=22219381&stateId=0%200%2022225106

VII. CVE INFORMATION

A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.

VIII. DISCLOSURE TIMELINE

10/10/2006  Initial vendor notification
10/11/2006  Initial vendor response
12/23/2006  Coordinated public disclosure

IX. CREDIT

This vulnerability was reported to iDefense by CIRT.DK.

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X. LEGAL NOTICES

Copyright © 2006 iDefense, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on, this
information.