Operating System:

Published:

28 April 2005

Protect yourself against future threats.

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

           ESB-2005.0349 -- SGI Security Advisory 20050405-01-P
                       Telnet Client Vulnerabilities
                               28 April 2005

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

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

Product:           telnet
Publisher:         SGI
Operating System:  IRIX
Impact:            Execute Arbitrary Code/Commands
Access:            Remote/Unauthenticated
CVE Names:         CAN-2005-0469 CAN-2005-0468

Ref:               ESB-2005.0244

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______________________________________________________________________________

                          SGI Security Advisory

Title:      Telnet Client Vulnerabilities
Number:     20050405-01-P
Date:       April 26, 2005
Reference:  SGI BUG 930927, CAN-2005-0468
Reference:  SGI BUG 930928, CAN-2005-0469
Fixed in:   Patch 5892 for IRIX 6.5.24-6.5.27
______________________________________________________________________________

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.
_____________________________________________________________________________

- - -----------------------
- - --- Issue Specifics ---
- - -----------------------

It has been reported by iDefense that there are several
vulnerabilities affecting the telnet client.

The bugs addressed by this patch are:

* 930927 telnet env_opt_add() issue
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468

* 930928 telnet slc_add_reply() issue
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469

SGI has investigated the issue and recommends the following steps for
resolving this issue.  It is HIGHLY RECOMMENDED that these measures
be implemented on ALL vulnerable SGI systems.


- - --------------
- - --- Impact ---
- - --------------

To determine the version of IRIX you are running, execute the following
command:

  # /bin/uname -R

That will return a result similar to the following:

  # 6.5 6.5.27m

The first number ("6.5") is the release name, the second ("6.5.27m" in
this case) is the extended release name.  The extended release name is
the "version" we refer to throughout this document.


- - ----------------
- - --- Solution ---
- - ----------------

SGI has provided a series of patches for these vulnerabilities
and recommends that all affected operating systems install the
appropriate patch.

OS Version     Vulnerable?     Patch #      Other Actions
- - ----------     -----------     -------      -------------
IRIX 3.x         unknown                        Note 1
IRIX 4.x         unknown                        Note 1
IRIX 5.x         unknown                        Note 1
IRIX 6.0.x       unknown                        Note 1
IRIX 6.1         unknown                        Note 1
IRIX 6.2         unknown                        Note 1
IRIX 6.3         unknown                        Note 1
IRIX 6.4         unknown                        Note 1
IRIX 6.5-6.5.23  unknown                        Note 1
IRIX 6.5.24      yes              5892          Notes 2 & 3
IRIX 6.5.25      yes              5892          Notes 2 & 3
IRIX 6.5.26      yes              5892          Notes 2 & 3
IRIX 6.5.27      yes              5892          Notes 2 & 3

   NOTES

     1) This version of the IRIX operating has been retired.
        Upgrade to an actively supported IRIX operating system.
        See http://support.sgi.com for more information.

     2) If you have not received an IRIX 6.5.X CD for IRIX 6.5,
        contact your SGI Support Provider or URL: http://support.sgi.com

     3) Install the required patch(es) based on your operating release.

                ##### Patch File Checksums ####

The actual patch will be a tar file containing the following files:

Filename:                 README.patch.5892
Algorithm #1 (sum -r):    29655 8 README.patch.5892
Algorithm #2 (sum):       38265 8 README.patch.5892
MD5 checksum:             45DFEF35B4699AAE4A38B17BB1FA48FE

Filename:                 patchSG0005892
Algorithm #1 (sum -r):    18517 2 patchSG0005892
Algorithm #2 (sum):       46714 2 patchSG0005892
MD5 checksum:             ED15767C8D0D11F26207006FFDC0E50E

Filename:                 patchSG0005892.eoe_sw
Algorithm #1 (sum -r):    30463 121 patchSG0005892.eoe_sw
Algorithm #2 (sum):       11253 121 patchSG0005892.eoe_sw
MD5 checksum:             3BCA2DA1370C8277F259D1CCD518ADB1

Filename:                 patchSG0005892.idb
Algorithm #1 (sum -r):    55685 1 patchSG0005892.idb
Algorithm #2 (sum):       35189 1 patchSG0005892.idb
MD5 checksum:             EB390B6DDE97D7C83BF3B4EBD0F78DB8


- - ------------------------
- - --- Acknowledgments ----
- - ------------------------

SGI wishes to thank iDEFENSE for their assistance in this matter.


- - -------------
- - --- Links ---
- - -------------

Patches are available via the web, anonymous FTP and from your SGI
service/support provider.

SGI Security Advisories can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/advisories/

SGI Security Patches can be found at:
http://www.sgi.com/support/security/ and
ftp://patches.sgi.com/support/free/security/patches/

SGI patches for IRIX can be found at the following patch servers:
http://support.sgi.com/ and ftp://patches.sgi.com/

SGI freeware updates for IRIX can be found at:
http://freeware.sgi.com/

SGI fixes for SGI open sourced code can be found on:
http://oss.sgi.com/projects/

SGI patches and RPMs for Linux can be found at:
http://support.sgi.com/ or
http://oss.sgi.com/projects/sgilinux-combined/download/security-fixes/

SGI patches for Windows NT or 2000 can be found at:
http://support.sgi.com/

IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at:
http://support.sgi.com/ and ftp://patches.sgi.com/support/patchset/

IRIX 6.5 Maintenance Release Streams can be found at:
http://support.sgi.com/

IRIX 6.5 Software Update CDs can be obtained from:
http://support.sgi.com/

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/

For security and patch management reasons, ftp.sgi.com (mirrors
patches.sgi.com security FTP repository) lags behind and does not
do a real-time update.


- - -----------------------------------------
- - --- 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>
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------

If there are general security questions on SGI systems, email can be
sent to security-info@sgi.com.

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.



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