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ESB-2006.0547 -- [HP-UX] -- HP-UX Sendmail MIME Remote Denial of Service (DoS)

Date: 03 August 2006
References: AL-2006.0048  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                         ESB-2006.0547 -- [HP-UX]
            HP-UX Sendmail MIME Remote Denial of Service (DoS)
                               3 August 2006

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              sendmail 8.13.3
                      sendmail 8.11.1
                      sendmail 8.9.3
Publisher:            Hewlett-Packard
Operating System:     HP-UX 11.23
                      HP-UX 11.11
                      HP-UX 11.04
                      HP-UX 11.00
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-1173

Ref:                  AL-2006.0048

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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c00680632
Version: 1

HPSBUX02124 SSRT061159 rev.1 - HP-UX Sendmail MIME Remote Denial of Service (DoS)

NOTICE: The information in this Security Bulletin should be acted upon as soon as possible.

Release Date: 2006-07-31
Last Updated: 2006-07-31

Potential Security Impact: Remote Denial of Service (DoS)

Source: Hewlett-Packard Company, HP Software Security Response Team

VULNERABILITY SUMMARY
A potential security vulnerability has been identified with HP-UX running Sendmail 
processing malformed multipart MIME messages. This vulnerability could potentially 
allow a remote unauthenticated user to cause a Denial of Service (DoS).

References: CVE-2006-1173

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.00, B.11.04, B.11.11, B.11.23

BACKGROUND

To determine if an HP-UX system has an affected version, search the output of 
"swlist -a revision -l fileset" for one of the filesets listed below. For affected 
systems verify that the recommended action has been taken.

AFFECTED VERSIONS

For sendmail 8.13.3
HP-UX B.11.23
==========
SMAIL-UPGRADE.INET-SMAIL
SMAIL-UPGRADE.INET2-SMAIL
action: install revision B.11.23.01.003 or subsequent
URL: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL813

HP-UX B.11.11
===========
SMAIL-UPGRADE.INETSVCS-SMAIL
action: install revision B.11.11.02.004 or subsequent
URL: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL813

For sendmail 8.11.1
HP-UX B.11.23
==========
InternetSrvcs.INETSVCS2-RUN
action: install PHNE_34689 or subsequent

HP-UX B.11.11
===========
SMAIL-811.INETSVCS-SMAIL
 ->action: install revision B.11.11.01.010 or subsequent
URL: ftp://sendmail:sendmail@hprc.external.hp.com/sendmail-811_10.depot

HP-UX B.11.00
===========
SMAIL-811.INETSVCS-SMAIL
action: install revision B.11.00.01.009 or subsequent
URL: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL811

For sendmail 8.9.3
HP-UX B.11.11
===========
InternetSrvcs.INETSVCS-RUN
action: install PHNE_34936 or subsequent

HP-UX B.11.04
===========
InternetSrvcs.INETSVCS-RUN
action: install PHNE_34927 or subsequent

HP-UX B.11.00
===========
InternetSrvcs.INETSVCS-RUN
action: install PHNE_34900 or subsequent

For sendmail 8.8.6
HP-UX B.11.00
==========
InternetSrvcs.INETSVCS-RUN
action: install PHNE_34900 or subsequent

END AFFECTED VERSIONS

RESOLUTION

HP has made the following software updates and patches available to resolve the issue.
PHNE_34689 PHNE_34900 PHNE_34927 PHNE_34936 SMAIL-811, SMAIL-UPGRADE
The patches are available from http://itrc.hp.com
while webupgrades for sendmail 8.13.3 on B.11.11 as well as for sendmail 8.11.1 
can be downloaded from http://software.hp.com

The following banner output and what(1) strings from these new binaries 
(as of this bulletin release) are for reference.

For sendmail 8.13.3, HP-UX B.11.23
sendmail -bs banner:
Sendmail version 8.13.3 - Revision 1.003 - 2006/05/24
what(1) string:
Sendmail version 8.13.3 - Revision 1.003 - 05/24/2006
URL: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL813

For sendmail 8.13.3, HP-UX B.11.11
sendmail -bs banner:
Sendmail version 8.13.3 - Revision 2.004 - 2006/06/29
what(1) string:
Sendmail version 8.13.3 - Revision 2.004 - 06/29/2006
URL: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL813

For sendmail 8.11.1, HP-UX B.11.23
sendmail -bs banner:
Sendmail 8.11.1 (Revision 1.09)/8.9.3
what(1) string:
version.c 8.11.1 (Berkeley) - 28th June 2006 (PHNE_34689)

For sendmail 8.11.1, HP-UX B.11.11
sendmail-811_10.depot
cksum 3720753575 2949120
md5 01f5e7c1a67c0b0a1103abdaa2907f21
sendmail -bs banner:
Sendmail 8.11.1 (Revision 1.10)
what(1) string:
version.c 8.11.1 (Berkeley) - (Revision 1.10) - 17th July 2006

For sendmail 8.11.1, HP-UX B.11.00
sendmail -bs banner:
Sendmail 8.11.1 - (Revision 1.09)
what(1) string:
version.c 8.11.1 (Berkeley) - (Revision 1.09) - 4th July 2006

For sendmail 8.9.3, HP-UX B.11.11
Install PHNE_34936 or subsequent

For sendmail 8.9.3, HP-UX B.11.00
Install PHNE_34900 or subsequent

For sendmail 8.9.3, HP-UX B.11.04
Install PHNE_34927 or subsequent
sendmail -bs banner:
Sendmail 8.9.3 (PHNE_32006)/8.9.3; Fri, 7 Jul 2006
what(1) string:
version.c 8.9.3.1 (Berkeley) 11/05/2006 (PHNE_32006)
Special Installation Instructions - Note: sendmail is not supported in daemon mode on 
VVOS platforms. It is provided as a mailing agent (outbound) only.

For sendmail 8.8.6, HP-UX B.11.00
Install PHNE_32006 or subsequent
Note: PHNE_32006 or subsequent upgrades sendmail 8.8.6 to sendmail 8.9.3.

MANUAL ACTIONS: Yes - Update
HP-UX B.11.23 - install software upgrade
HP-UX B.11.11 - install software upgrade
HP-UX B.11.00 - install software upgrade

PRODUCT SPECIFIC INFORMATION
HP-UX Security Patch Check: Security Patch Check revision B.02.00 analyzes all 
HP-issued Security Bulletins to provide a subset of recommended actions that 
potentially affect a specific HP-UX system. For more information: http://software.hp.com/portal/swdepot/displayProductInfo.do?_productNumber=B6834AA

HISTORY:
Version: 1 (rev.1) - 31 July 2006 Initial release

Support: For further information, contact normal HP Services
support channel.

Report: To report a potential security vulnerability with any HP
supported product, send Email to: security-alert@hp.com.  It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information.  To get the security-alert PGP key, please send an
e-mail message as follows:
  To: security-alert@hp.com
  Subject: get key

Subscribe: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&
langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC

On the web page: ITRC security bulletins and patch sign-up
Under Step1: your ITRC security bulletins and patches
  - check ALL categories for which alerts are required and
    continue.
Under Step2: your ITRC operating systems
  - verify your operating system selections are checked and
    save.

To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page:
  Subscriber's choice for Business: sign-in.
On the web page:
  Subscriber's Choice: your profile summary
    - use Edit Profile to update appropriate sections.

To review previously published Security Bulletins visit:
http://www.itrc.hp.com/service/cki/secBullArchive.do

* The Software Product Category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number in the title:

    GN = HP General SW,
    MA = HP Management Agents,
    MI = Misc. 3rd party SW,
    MP = HP MPE/iX,
    NS = HP NonStop Servers,
    OV = HP OpenVMS,
    PI = HP Printing & Imaging,
    ST = HP Storage SW,
    TL = HP Trusted Linux,
    TU = HP Tru64 UNIX,
    UX = HP-UX,
    VV = HP Virtual Vault


System management and security procedures must be reviewed
frequently to maintain system integrity. HP is continually
reviewing and enhancing the security features of software products
to provide customers with current secure solutions.

"HP is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected HP products the
important security information contained in this Bulletin. HP
recommends that all users determine the applicability of this
information to their individual situations and take appropriate
action. HP does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently, HP
will not be responsible for any damages resulting from user's use
or disregard of the information provided in this Bulletin. To the
extent permitted by law, HP disclaims all warranties, either
express or implied, including the warranties of merchantability
and fitness for a particular purpose, title and non-infringement."


(c)Copyright 2006 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
provided is provided "as is" without warranty of any kind. To the
extent permitted by law, neither HP nor its affiliates,
subcontractors or suppliers will be liable for incidental, special
or consequential damages including downtime cost; lost profits;
damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration.
The information in this document is subject to change without
notice. Hewlett-Packard Company and the names of Hewlett-Packard
products referenced herein are trademarks of Hewlett-Packard
Company in the United States and other countries. Other product
and company names mentioned herein may be trademarks of their
respective owners.

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You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================

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