[VulnWatch] Sendmail DNS Map Vulnerability on IRIX

From: SGI Security Coordinator (agent99_at_sgi.com)
Date: 08/25/03

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    Date: Mon, 25 Aug 2003 10:10:30 -0700
    To: agent99@sgi.com


                               SGI Security Advisory

      Title : Sendmail DNS Map Vulnerability
      Number : 20030803-01-P
      Date : August 25, 2003
      Reference: CVE CAN-2003-0688
      Reference: SGI BUG 898396
      Fixed in : IRIX 6.5.22 or patch 5287

    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's been reported by sendmail.org that there is a potential problem in the
    sendmail 8.12 series with respect to DNS maps in sendmail 8.12.8 and earlier
    sendmail 8.12.x versions: http://www.sendmail.org/dnsmap1.html

    SGI ships sendmail 8.12.5 with IRIX 6.5.19 and later. The bug did not exist
    in versions before 8.12 as the DNS map type is new to 8.12.x versions.
    This bug could potentially be exploited to cause a Denial of Service.
    There may be a possibility of using it to gain remote root access.

    The Common Vulnerabilities and Exposures project (cve.mitre.org) has
    assigned the name CAN-2003-0688 to this issue:

    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 in patches 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 6.5.19f

    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 if you use dns
    maps with sendmail. SGI recommends either upgrading to IRIX 6.5.22 (when
    available), 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 6.5.22 (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 no
       IRIX 6.5.1 no
       IRIX 6.5.2 no
       IRIX 6.5.3 no
       IRIX 6.5.4 no
       IRIX 6.5.5 no
       IRIX 6.5.6 no
       IRIX 6.5.7 no
       IRIX 6.5.8 no
       IRIX 6.5.9 no
       IRIX 6.5.10 no
       IRIX 6.5.11 no
       IRIX 6.5.12 no
       IRIX 6.5.13 no
       IRIX 6.5.14 no
       IRIX 6.5.15 no
       IRIX 6.5.16 no
       IRIX 6.5.17 no
       IRIX 6.5.18 no
       IRIX 6.5.19 yes 5287 Notes 2 & 3
       IRIX 6.5.20 yes 5287 Notes 2 & 3
       IRIX 6.5.21 yes 5287 Notes 2 & 3
       IRIX 6.5.22 no


         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) Upgrade to IRIX 6.5.22 (when available) or install the patch.

                  ##### Patch File Checksums ####
    Filename: README.patch.5287
    Algorithm #1 (sum -r): 03461 10 README.patch.5287
    Algorithm #2 (sum): 38994 10 README.patch.5287
    MD5 checksum: 727E74B176D101AA4DE1E5F816E86AF2

    Filename: patchSG0005287
    Algorithm #1 (sum -r): 39412 4 patchSG0005287
    Algorithm #2 (sum): 5197 4 patchSG0005287
    MD5 checksum: 6A69EEF8FC02D549D110A64F8DEDA98C

    Filename: patchSG0005287.eoe_src
    Algorithm #1 (sum -r): 18481 378 patchSG0005287.eoe_src
    Algorithm #2 (sum): 2432 378 patchSG0005287.eoe_src
    MD5 checksum: EBDE27E3AF773E0EA6D2884A88501B71

    Filename: patchSG0005287.eoe_sw
    Algorithm #1 (sum -r): 34932 1104 patchSG0005287.eoe_sw
    Algorithm #2 (sum): 48296 1104 patchSG0005287.eoe_sw
    MD5 checksum: 0DE3B5C3BE9FE1DE0E0F022BB2FCDF14

    Filename: patchSG0005287.idb
    Algorithm #1 (sum -r): 56703 4 patchSG0005287.idb
    Algorithm #2 (sum): 23907 4 patchSG0005287.idb
    MD5 checksum: 6A25934457046F7EDFD84A9CE39C9623

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

    SGI wishes to thank 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/ and ftp://patches.sgi.com/

    SGI freeware updates for IRIX can be found at:

    SGI patches and RPMs for Linux can be found at:

    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/ 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

    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


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