Operating System:

Published:

19 September 2002

Protect yourself against future threats.

-----BEGIN PGP SIGNED MESSAGE-----

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

                   ESB-2002.520 -- SGI Security Advisory
           IGMP multicast report Denial of Service vulnerability
                             19 September 2002

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

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

Product:                IGMP
Vendor:                 SGI
Operating System:       IRIX
Impact:                 Denial of Service
Access Required:        Remote

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----


______________________________________________________________________________
                           SGI Security Advisory

         Title:  IGMP multicast report Denial of Service vulnerability
        Number:  20020901-01-A
          Date:  September 18, 2002
______________________________________________________________________________

SGI provides this information freely to the SGI user community for its
consideration, interpretation, implementation and use.   SGI recommends
that this information be acted upon as soon as possible.

SGI provides the information in this Security Advisory on an "AS-IS" basis
only, and disclaims all warranties with respect thereto, express, implied
or otherwise, including, without limitation, any warranty of merchantability
or fitness for a particular purpose.  In no event shall SGI be liable for
any loss of profits, loss of business, loss of data or for any indirect,
special, exemplary, incidental or consequential damages of any kind arising
from your use of, failure to use or improper use of any of the instructions
or information in this Security Advisory.
______________________________________________________________________________

SGI acknowledges the IGMP multicast report DoS vulnerability reported at:
http://www.cs.ucsb.edu/~krishna/igmp_dos/, and is currently investigating.

No further information is available at this time.  As further information
becomes available, additional advisories will be issued.

For the protection of all our customers, SGI does not disclose, discuss or
confirm vulnerabilities until a full investigation has occurred and any
necessary patch(es) or release streams are available for all vulnerable and
supported Linux and IRIX operating systems.

Until SGI has more definitive information to provide, customers are
encouraged to assume all security vulnerabilities as exploitable and take
appropriate steps according to local site security policies and
requirements.

As further information becomes available, additional advisories will be
issued via the normal SGI security information distribution methods
including the wiretap mailing list.

- - - -----------------------------------------
- - - --- SGI Security Information/Contacts ---
- - - -----------------------------------------

If there are questions about this document, email can be sent to
security-info@sgi.com.

                      ------oOo------

SGI provides security information and patches for use by the entire SGI
community.  This information is freely available to any person needing the
information and is available via anonymous FTP and the Web.

The primary SGI anonymous FTP site for security advisories and patches is
patches.sgi.com (216.32.174.211).  Security advisories and patches are
located under the URL ftp://patches.sgi.com/support/free/security/

The SGI Security Headquarters Web page is accessible at the URL
http://www.sgi.com/support/security/

For issues with the patches on the FTP sites, email can be sent to
security-info@sgi.com.

For assistance obtaining or working with security patches, please contact
your SGI support provider.

                      ------oOo------

SGI provides a free security mailing list service called wiretap and
encourages interested parties to self-subscribe to receive (via email) all
SGI Security Advisories when they are released. Subscribing to the mailing
list can be done via the Web
(http://www.sgi.com/support/security/wiretap.html) or by sending email to
SGI as outlined below.

% mail wiretap-request@sgi.com
subscribe wiretap <YourEmailAddress such as aaanalyst@sgi.com >
end
^d

In the example above, <YourEmailAddress> is the email address that you wish
the mailing list information sent to.  The word end must be on a separate
line to indicate the end of the body of the message. The control-d (^d) is
used to indicate to the mail program that you are finished composing the
mail message.


                      ------oOo------

SGI provides a comprehensive customer World Wide Web site. This site is
located at http://www.sgi.com/support/security/ .

                      ------oOo------

For reporting *NEW* SGI security issues, email can be sent to
security-alert@sgi.com or contact your SGI support provider.  A support
contract is not required for submitting a security report.

______________________________________________________________________________

This information is provided freely to all interested parties and may be
redistributed provided that it is not altered in any way, SGI is
appropriately credited and the document retains and includes its valid PGP
signature.


- -----BEGIN PGP SIGNATURE-----
Version: 2.6.2

iQCVAwUBPYii9bQ4cFApAP75AQH+hwP/UL6rxB7Ai6wDO77hwcN9Bll7TH5TBe9j
J4CkwwPK6YucqbiGqArRuheRTXdWXEDUihtk8DTwlZbn2dAcSXKaz2FRdJ5e2X/f
3DcAb8Y9EaI2ikH3AFAb5mdmqgHeWvUM9fKy3a/iYf7YcoIHsDZMZOIJSUTt0TnF
i26e3I+lkiY=
=ZXA+
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

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.

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 use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.

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 original authors 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/Information/advisories.html

If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).

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.

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key

iQCVAwUBPYnlUih9+71yA2DNAQGgsQP+IJlL4WZxKxGskE5dei24+Rd8Y+TEox4+
14fTW5LFtIuMoXyKvYvVfNA6CtqbOlgBYSgT2yP0LiX40Aag2//eOR92BN/y5yQd
wJ9fVHlCAwutvFNk35clXJPHg2gzaNNCfFywzinrtA4mjKsV/coCtqzOEJEL5Lb7
4Hb1UsdM+sk=
=csjj
-----END PGP SIGNATURE-----