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securityvulnsSecurityvulnsSECURITYVULNS:DOC:13343
HistoryJun 28, 2006 - 12:00 a.m.

SYMSA-2006-006: Lotus Domino SMTP Based Denial of Service

2006-06-2800:00:00
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              Symantec Vulnerability Research
              http://www.symantec.com/research
                    Security Advisory

Advisory ID : SYMSA-2006-006
Advisory Title : Lotus Domino SMTP Based Denial of Service
Author : Ollie Whitehouse ([email protected])
Release Date : June 27, 2006
Application : Lotus Notes / Domino
Platform : Multiple supported platforms.
Severity : Remote Denial-of-Service
Vendor status : IBM has resolved this issue in Domino 6.5.4 FP1,
6.5.5 and 7.0
CVE Candidate : CAN-2006-0119
Reference : http://www.securityfocus.com/bid/18020

Overview:

    Lotus Domino is a client/server product designed for
    collaborative working environments. Domino is designed
    for e-mail, scheduling, instant messaging and data
    driven applications.

    There exists a Denial-of-Service condition within
    NROUTER when parsing meeting requests. The result of
    which is that no external or internal mail will be
    delivered during the processing of the malformed
    message.

    This attack can be triggered from the Internet via
    standard mail protocols.

Details:

    When a malformed meeting request (vCal) is sent to a
    Lotus Domino based host via SMTP the routing server
    (nrouter.exe) will consume 100% of the CPU.

    In Symantec's testing on an Intel PIII with 256MB of
    RAM, 24 hours of procesing did not clear the message.
    Shutting down the server and restarting it does not
    resolve the problem due to the message remaining in
    the mail queue. The result of which is that the server
    returns to consuming 100% of the CPU.

    As stated above all e-mail functionality on the server
    will be disabled while the message is being processed.

Vendor Response:

    This issue was reported as 'SPR# KSPR699NBP' and has
    been resolved in Domino 6.5.4 FP1, 6.5.5 and 7.0. For
    more information, please see technote #1211952.

    www.ibm.com/support/docview.wss?rs=475&uid=swg21211952

    IBM recommends that instances of Domino are upgraded
    to at least 6.5.4 FP1, 6.5.5 or 7.0 in order to ensure
    this vulnerability is mitigated.

Recommendation:

    Follow your organization's testing procedures before
    applying patches or upgrading software.  See IBM's
    instructions as to which versions of Domino resolve
    this Denial-of-Service vulnerability.

Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has
assigned the following names to these issues. These are
candidates for inclusion in the CVE list (http://cve.mitre.org),
which standardizes names for security problems.

    CAN-2006-0119
  • -----Symantec Vulnerability Research Advisory Information-----

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  • -------------Symantec Product Advisory Information-------------

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Copyright (c) 2006 by Symantec Corp.
Permission to redistribute this alert electronically is granted
as long as it is not edited in any way unless authorized by
Symantec Consulting Services. Reprinting the whole or part of
this alert in any medium other than electronically requires
permission from [email protected].

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
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