[VulnWatch] Login Vulnerabilities on IRIX

From: SGI Security Coordinator (agent99_at_sgi.com)
Date: 07/17/03

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    ______________________________________________________________________________
                               SGI Security Advisory

    Title : Login Vulnerabilities
    Number : 20030702-01-P
    Date : July 16, 2003
    Reference: CVE CAN-2003-0574
    Reference: SGI BUGS 850587 889119
    Fixed in : IRIX 6.5.21 or patch 5182
    ______________________________________________________________________________

    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 that logging into an IRIX 6.5 machine while particular
    environment variables are set can lead to /usr/lib/iaf/scheme (login)
    dumping core. Since "scheme" is suid root, this could potentially lead to a
    root compromise. A local account would be required to exploit any such
    vulnerability.

    This issue was assigned the following CVE:
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0574

    Please note that this is not the same issue as reported in
    CERT advisory CA-2001-34 or CERT advisory CA-1997-21 (CVE-1999-0028).

    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 future releases of IRIX.

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

    The scheme binary is installed by default on IRIX 6.5 systems as part of
    eoe.sw.base.

    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.

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

    There is no effective workaround available for these problems. SGI
    recommends either upgrading to IRIX 6.5.21, 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 6.5.21, 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 Notes 2 & 3
       IRIX 6.5.16 yes 5182 Notes 2 & 4
       IRIX 6.5.17 yes 5182 Notes 2 & 4
       IRIX 6.5.18 yes 5182 Notes 2 & 4
       IRIX 6.5.19 yes 5182 Notes 2 & 4
       IRIX 6.5.20 yes 5182 Notes 2 & 4
       IRIX 6.5.21 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 6.5.21 or later.

         4) Install patch 5182.

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

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

    Filename: README.patch.5182
    Algorithm #1 (sum -r): 38247 8 README.patch.5182
    Algorithm #2 (sum): 42384 8 README.patch.5182
    MD5 checksum: 0176171441AE46078FDBB1DB630C8397

    Filename: patchSG0005182
    Algorithm #1 (sum -r): 40388 2 patchSG0005182
    Algorithm #2 (sum): 1995 2 patchSG0005182
    MD5 checksum: B5A294E9B777C62DF04CEC66012BEFA8

    Filename: patchSG0005182.eoe_sw
    Algorithm #1 (sum -r): 33077 76 patchSG0005182.eoe_sw
    Algorithm #2 (sum): 57300 76 patchSG0005182.eoe_sw
    MD5 checksum: 84429D3529CE8B6F09508EDF68037580

    Filename: patchSG0005182.idb
    Algorithm #1 (sum -r): 23124 2 patchSG0005182.idb
    Algorithm #2 (sum): 42608 2 patchSG0005182.idb
    MD5 checksum: 367E564FC2EC650A0B632EB0EC9374E1

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

    SGI wishes to thank Walter Roberson, FIRST 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 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. 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. 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 zedwatch@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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