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Novell Netmail IMAP append Denial of Service Vulnerability

12.23.06

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/

DESCRIPTION

Remote exploitation of a Denial of Service vulnerability in Novell Netmail 3.52 could allow an authenticated attacker the ability to crash the imapd server.

Novell NetMail can be made to crash by sending an APPEND command with a single '(' character as an argument.

ANALYSIS

This vulnerability is limited to a DoS only condition and requires authentication in order to exploit it.

DETECTION

iDefense has confirmed the existence of this vulnerability in the IMAPD server of Novell NetMail 3.52d and 3.52e. Older versions are suspected to be vulnerable as well.

WORKAROUND

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

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

CVE INFORMATION

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

DISCLOSURE TIMELINE

10/16/2006 Initial vendor notification
10/19/2006 Initial vendor response
12/23/2006 Coordinated public disclosure

CREDIT

This vulnerability was reported to iDefense by CIRT.DK.

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LEGAL NOTICES

Copyright © 2006 Verisign, Inc.

Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customer service for permission.

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.