AUSCERT External Security Bulletin Redistribution

                  ESB-2003.0008 -- SGI Security Advisory
                   Multiple Vulnerabilities in Sendmail
                              07 January 2003


        AusCERT Security Bulletin Summary

Product:                sendmail
Vendor:                 SGI
Operating System:       IRIX 6.5.18 and prior
Impact:                 Root Compromise
Access Required:        Existing Account

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


                          SGI Security Advisory

Title    : Multiple Vulnerabilities in Sendmail
Number   : 20030101-01-P
Date     : January 6, 2003
Reference: CVE CAN-2002-1165
Reference: iDEFENSE Security Advisory 10.01.02
Reference: SGI BUG 869098 875386
Fixed in : IRIX 6.5.19 or patch 4911

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

This bulletin addresses two vulnerabilities that exist in SGI supplied
versions of sendmail:

  o  sendmail's smrsh restrictions can be bypassed by a local user, possibly
     gaining root access.  See the following URLs for additional information:


  o  sendmail's "check_relay" for IP addresses can be circumvented using bogus
     DNS data

     http://www.sendmail.org/ has more details in "Recent News (2002-Dec-03)"

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

These issues have been corrected with a patch and in future releases of IRIX.

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

The sendmail binary is installed by default on IRIX 6.5 systems as part of

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

  # /bin/uname -R

That will return a result similar to the following:

  # 6.5 6.5.16f

The first number ("6.5") is the release name, the second ("6.5.16f" in this
case) is the extended release name.  The extended release name is the
"version" we refer to throughout this document.

- - ----------------------------
- - --- Temporary Workaround ---
- - ----------------------------

There is no effective workaround available for these problems.  SGI
recommends either upgrading to IRIX 6.5.19 when released, or installing the
appropriate patch from the listing below.

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

SGI has provided a series of patches for these vulnerabilities. Our
recommendation is to upgrade to IRIX 6.5.19 when available, or 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          yes                       Notes 2 & 3
   IRIX 6.5.1        yes                       Notes 2 & 3
   IRIX 6.5.2        yes                       Notes 2 & 3
   IRIX 6.5.3        yes                       Notes 2 & 3
   IRIX 6.5.4        yes                       Notes 2 & 3
   IRIX 6.5.5        yes                       Notes 2 & 3
   IRIX 6.5.6        yes                       Notes 2 & 3
   IRIX 6.5.7        yes                       Notes 2 & 3
   IRIX 6.5.8        yes                       Notes 2 & 3
   IRIX 6.5.9        yes                       Notes 2 & 3
   IRIX 6.5.10       yes                       Notes 2 & 3
   IRIX 6.5.11       yes                       Notes 2 & 3
   IRIX 6.5.12       yes                       Notes 2 & 3
   IRIX 6.5.13       yes                       Notes 2 & 3
   IRIX 6.5.14       yes                       Notes 2 & 3
   IRIX 6.5.15       yes             4911      Notes 2, 4 & 5
   IRIX 6.5.16       yes             4911      Notes 2, 4 & 5
   IRIX 6.5.17       yes             4911      Notes 2, 4 & 5
   IRIX 6.5.18       yes             4911      Notes 2, 4 & 5
   IRIX 6.5.19        no


     1) This version of the IRIX operating has been retired. Upgrade to an
        actively supported IRIX operating system.  See
        http://support.sgi.com/irix/news/index.html#policy for more

     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/irix/swupdates/

     3) Upgrade to IRIX 6.5.15 or later and install the patch, or upgrade to
        IRIX 6.5.19 when released.

     4) Install patch 4911

     5) You should also use the workarounds noted in SGI Security Advisory

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

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

Filename:                 README.patch.4911
Algorithm #1 (sum -r):    61910 9 README.patch.4911
Algorithm #2 (sum):       20270 9 README.patch.4911
MD5 checksum:             A17D14BFA5F90FB15612ED6C4C2452A0

Filename:                 patchSG0004911
Algorithm #1 (sum -r):    47298 4 patchSG0004911
Algorithm #2 (sum):       2490 4 patchSG0004911
MD5 checksum:             77AEB2FAD0161065A42C3CF880414925

Filename:                 patchSG0004911.eoe_src
Algorithm #1 (sum -r):    02599 40 patchSG0004911.eoe_src
Algorithm #2 (sum):       47170 40 patchSG0004911.eoe_src
MD5 checksum:             A1427ED806F47C55D60FE10FD2D0E922

Filename:                 patchSG0004911.eoe_sw
Algorithm #1 (sum -r):    48824 56 patchSG0004911.eoe_sw
Algorithm #2 (sum):       34470 56 patchSG0004911.eoe_sw
MD5 checksum:             544374A0E0ECA1BFB47089381A11DCEB

Filename:                 patchSG0004911.idb
Algorithm #1 (sum -r):    06347 2 patchSG0004911.idb
Algorithm #2 (sum):       63701 2 patchSG0004911.idb
MD5 checksum:             C37AF4EF79201B7F9F6CD516A54D2C1C

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

SGI wishes to thank iDEFENSE, sendmail.org and the users of the Internet
Community at large for their assistance in this matter.

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

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

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

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

SGI freeware updates for IRIX can be found at:

SGI fixes for SGI open sourced code can be found on:

SGI patches and RPMs for Linux can be found at:
http://support.sgi.com/linux/ or

SGI patches for Windows NT or 2000 can be found at:

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

IRIX 6.5 Maintenance Release Streams can be found at:

IRIX 6.5 Software Update CDs can be obtained from:

The primary SGI anonymous FTP site for security advisories and patches is
patches.sgi.com (  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


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 (  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:

For issues with the patches on the FTP sites, email can be sent to

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


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 zedwatch@sgi.com >

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.


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


If there are general security questions on SGI systems, email can be sent to

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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