[Full-Disclosure] Multiple Vulnerabilities in BSD LPR Subsystem on IRIX

From: SGI Security Coordinator (agent99@sgi.com)
Date: 04/14/03

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    From: SGI Security Coordinator <agent99@sgi.com>
    To: agent99@sgi.com
    Date: Mon, 14 Apr 2003 10:09:49 -0700
    

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

    ______________________________________________________________________________
                              SGI Security Advisory

    Title : Multiple Vulnerabilities in BSD LPR Subsystem
    Number : 20030406-01-P
    Date : April 14, 2003
    Reference: CERT VU#39001
    Reference: CERT VU#30308
    Reference: CERT VU#293305
    Reference: CVE CAN-2003-0144
    Reference: SGI BUGS 864917 865485 873984 874729 880124 883255
    Fixed in : IRIX 6.5.20 (when available) or patch 5048
    ______________________________________________________________________________

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

    It's been reported that there are several vulnerabilities in the IRIX bsdlpr
    printing subsystem:

      o lpd chkhost() routine is easily spoofed
         See: http://www.kb.cert.org/vuls/id/30308

      o lpd should execl() sendmail -t, not sendmail
         See: http://www.kb.cert.org/vuls/id/39001

      o Unstable behavior in lpd resulting from the patch4835 fixes

      o lprm buffer overrun
         See: http://www.insecure.org/sploits/lprm.overflow.html
              http://www.kb.cert.org/vuls/id/293305
              http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0144

    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 patches and in future releases of IRIX.

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

    The bsdlpr subsystem is not installed by default on IRIX 6.5 systems.
    It is an optional product which can be installed as "print.sw.bsdlpr".

    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 6.5.19f

    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.

    To see if the bsdlpr subsystem is installed, execute the following command:

      $ versions print.sw.bsdlpr
      I = Installed, R = Removed

         Name Date Description
         I print 01/30/2003 Printing Tools, Release 1.16.5f
         I print.sw 01/30/2003 Printing Tools Software 1.16.5f
         I print.sw.bsdlpr 01/30/2003 Berkeley 'lpr' Printer Spooler

    If the output shown is similar to the above, then the subsystem is installed
    and the system may be vulnerable.

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

    There is no effective workaround available for these problems if the bsdlpr
    capabilities are needed in your printing environment. SGI recommends either
    upgrading to IRIX 6.5.20 (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 6.5.20 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 5048 Notes 2, 3, & 4
       IRIX 6.5.15 yes 5048 Notes 2, 3, & 4
       IRIX 6.5.16 yes 5048 Notes 2, 3, & 4
       IRIX 6.5.17 yes 5048 Notes 2, 3, & 4
       IRIX 6.5.18 yes 5048 Notes 2, 3, & 4
       IRIX 6.5.19 yes 5048 Notes 2, 3, & 4
       IRIX 6.5.20 no

       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) Upgrade to IRIX 6.5.20 (when available)

         4) Install the patch or upgrade to IRIX 6.5.20 (when available).
            Security patches are available on both http://support.sgi.com/ and
            ftp://patches.sgi.com/support/free/security/patches/
            Note that the patch does include all the fixes that were originally
            in patch 4835.

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

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

    Filename: README.patch.5048
    Algorithm #1 (sum -r): 51846 8 README.patch.5048
    Algorithm #2 (sum): 47369 8 README.patch.5048
    MD5 checksum: 3175319BBCAD0FB259BC2F7000660183

    Filename: patchSG0005048
    Algorithm #1 (sum -r): 49890 3 patchSG0005048
    Algorithm #2 (sum): 36149 3 patchSG0005048
    MD5 checksum: C9C44E3180CB19C1B9F7CD53085E5881

    Filename: patchSG0005048.idb
    Algorithm #1 (sum -r): 28007 3 patchSG0005048.idb
    Algorithm #2 (sum): 52656 3 patchSG0005048.idb
    MD5 checksum: 80EF1CE4AF3D0B31E078C11A7AB31AF5

    Filename: patchSG0005048.print_sw
    Algorithm #1 (sum -r): 60504 265 patchSG0005048.print_sw
    Algorithm #2 (sum): 29117 265 patchSG0005048.print_sw
    MD5 checksum: 4B6F65DCB5BEA2966D60EC03D3FA6F9C

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

    SGI wishes to thank the U.S. Air Force, NASA 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
    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/

    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 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------

    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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