SSRT2439 Potential Security Vulnerability in xdrmem_getbytes() (rev.7)

From: Security Alert (secure_at_cup.hp.com)
Date: 10/16/03

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    **REVISED 07**
     Source: HEWLETT-PACKARD COMPANY
     SECURITY BULLETIN: HPSBUX0303-252
     Originally issued: 19 March 2003
     Last revised: 15 October 2003
     SSRT2439 Potential Security Vulnerability in xdrmem_getbytes()
              (rev.7)
     -----------------------------------------------------------------

    NOTICE: There are no restrictions for distribution of this
    Bulletin provided that it remains complete and intact.

    The information in the following Security Bulletin should be
    acted upon as soon as possible. Hewlett-Packard Company will
    not be liable for any consequences to any customer resulting
    from customer's failure to fully implement instructions in this
    Security Bulletin as soon as possible.

     -----------------------------------------------------------------
    PROBLEM: Potental buffer overflow in xdrmem_getbytes() and
             related functions.

    IMPACT: Potential unauthorized access, denial of service.

    PLATFORM: HP-UX B.10.20, B.11.00, B.11.04, B.11.11, and B.11.22

    **REVISED 07**
    SOLUTION: Until patches are available manually install the
              appropriate fixed libraries.
     --> Patches are now available for B.11.00 and B.11.11
     --> which eliminate the manual installation of all
     --> but libc.1.

              B.10.20 - PHCO_26158
     --> B.11.00 - PHCO_28982
     --> B.11.11 - PHCO_28983

    MANUAL ACTIONS: Yes - NonUpdate
                    Download and install the appropriate files.

    AVAILABILITY: The files are available now. This bulletin will
                   be revised when patches are available.

    CHANGE SUMMARY: Rev.01 - Corrected instructions for replacing
                             libc.1 on 11.00 and 11.11.
                             Added CERT CA-2003-10 reference.
                    Rev.02 - Corrected instructions 10.20
                    Rev.03 - Patches are available for 11.00 and 11.11
                             libc.1 must still be manually installed
                             for 11.00 and 11.11
                    Rev.04 - Corrected 11.00 and 11.11 patch
                             information.
                    Rev.05 - Added note about general release patches
                    Rev.06 - Added PHCO_26158.
                             Added AFFECTED VERSIONS section.
                    Rev.07 - Added PHCO_28982 and PHCO_28983.

     -----------------------------------------------------------------
     A. Background

        There are potential buffer overflows in
        xdrmem_getbytes() and related functions.

        This issue has been reported by CERT/CC in
        advisory CA-2003-10.

        NOTE:
        The files listed below also have the fix for
        HPSBUX0209-215
        SSRT2336 Security Vulnerability in XDR library
        This bulletin should be implemented instead of
        HPSBUX0209-215.

        HP Tru64 UNIX/TruCluster Servers:
        The following potential security vulnerability has been
        identified or reported in the HP Tru64 UNIX operating system
        that may result in unauthorized Privileged Access or a
        Denial of Service (DoS).
        This potential vulnerability may be in the form of Local
        and Remote security domain risks.

        Cross reference: SSRT2322, SSRT2384, SSRT2341,
                        SSRT2439,SSRT2412

        Not Impacted:

          HP NonStop Servers
          HP OpenVMS

         AFFECTED VERSIONS

         The following is a list by HP-UX revision of
         affected filesets and the fileset revision or
         patch containing the fix. To determine if a
         system has an affected version, search the
         output of "swlist -a revision -l fileset"
         for an affected fileset, then determine if
         a fixed revision or the applicable patch is
         installed.

         HP-UX B.11.22
         =============
         NFS.NFS-64SLIB
         fix: libnsl.so.1.64_11.22IA
         NFS.NFS-SHLIBS
         fix: libnsl.so.1.32_11.22IA
         OS-Core.CORE2-SHLIBS
         fix: install libc.1 as described below

    **REVISED 07**
         HP-UX B.11.11
         =============
         NFS.NFS-64SLIB
         NFS.NFS-SHLIBS
     --> fix: PHNE_28983
         OS-Core.CORE-SHLIBS
         fix: install libc.1 as described below

         HP-UX B.11.04
         =============
         NFS.NFS-64SLIB
         fix: libnsl.1.64_11.00, libnsl.a.64_11.00
         NFS.NFS-SHLIBS
         fix: libnsl.1.32_11.00, libnsl.a.32_11.00
         OS-Core.CORE-SHLIBS
         fix: install libc.1 as described below

    **REVISED 07**
         HP-UX B.11.00
         =============
         NFS.NFS-64SLIB
         NFS.NFS-SHLIBS
     --> fix: PHNE_28982
         OS-Core.CORE-SHLIBS
         fix: install libc.1 as described below

         HP-UX B.10.20
         =============
         OS-Core.CORE-SHLIBS
         fix: PHCO_26158 or subsequent

     B. Recommended solution

    **REVISED 07**
     -->Note: If the preliminary patches, PHNE_28929.depot or
     --> PHNE_28930.depot have been installed, they must
     --> be removed with swremove before installing the
     --> general release patches PHNE_28982 (11.00) or
     --> PHNE_28983 (11.11) or subsequent.

        Until patches are released, download and manually install
        the appropriate libraries and preliminary patches.

         System: hprc.external.hp.com (192.170.19.51)
         Login: xdr2
         Password: xdr2

         Browser ftp access:

         ftp://xdr2:xdr2@hprc.external.hp.com/
         or
         ftp://xdr2:xdr2@192.170.19.51/

            Note: There is an ftp defect in IE5 that may result in
                   a browser hang. To work around this:
            Select Tools -> Internet Options -> Advanced
            Un-check the option: [ ] Enable folder view for FTP sites

             If you wish to verify the md5 sum please refer to:

                   HPSBUX9408-016
                   Patch sums and the MD5 program

         Download the appropriate files and unpack with gunzip:

            libc.1.gz # B.11.00, B.11.04, B.11.11, B.11.22
            libnsl.1.32_11.00.gz # B.11.04
            libnsl.a.32_11.00.gz # B.11.04
            libnsl.1.64_11.00.gz # B.11.04
            libnsl.a.64_11.00.gz # B.11.04
            libnsl.so.1.32_11.22IA.gz # B.11.22
            libnsl.so.1.64_11.22IA.gz # B.11.22

          Verify the cksum or md5.

             If you wish to verify the md5 sum please refer to:

                   HPSBUX9408-016
                   Patch sums and the MD5 program

          cksum:
          3108550729 1867776 libc.1
          2543748420 679936 libnsl.1.32_11.00
          3883898582 652664 libnsl.1.64_11.00
          2393869471 818268 libnsl.a.32_11.00
          205723668 1456024 libnsl.a.64_11.00
          2149197207 1490400 libnsl.so.1.32_11.22IA
          755476395 1565336 libnsl.so.1.64_11.22IA

     MD5 (libc.1) = 118ce482dbb3982b7484ddc434d77a51
     MD5 (libnsl.1.32_11.00) = a6bbfcae4a7044b0d1e9aece871c126e
     MD5 (libnsl.1.64_11.00) = b3c76866d75a4216be7787f219c051df
     MD5 (libnsl.a.32_11.00) = 1c0aea725173673eb1c8e9410180096c
     MD5 (libnsl.a.64_11.00) = 06c8fd367c7620a017e9bb2e7df3ec7d
     MD5 (libnsl.so.1.32_11.22IA) = 6da4151346312058269645856e16ac89
     MD5 (libnsl.so.1.64_11.22IA) = f5f89dd00c66d03d7e14a72232c86f25

          For B.11.04
          ====================================
          #DIR=[path to new files]
          #cd /usr/lib

          #cp $DIR/libnsl.1.32_11.00 libnsl.1.new
          #cp $DIR/libnsl.a.32_11.00 libnsl.a.new
          #cp $DIR/libc.1 libc.1.new

          #chmod 555 libnsl.1.new
          #chmod 444 libnsl.a.new
          #chmod 555 libc.1.new

          #chown bin:bin libnsl.1.new
          #chown bin:bin libnsl.a.new
          #chown bin:bin libc.1.new

          #mv libnsl.1 libnsl.1.orig
          #mv libnsl.a libnsl.a.orig
          #mv libc.1 libc.1.orig

          #mv libnsl.1.new libnsl.1
          #mv libnsl.a.new libnsl.a
          #mv libc.1.new libc.1

          #cd /usr/lib/pa20_64

          #cp $DIR/libnsl.1.64_11.00 libnsl.1.new
          #cp $DIR/libnsl.a.64_11.00 libnsl.a.new

          #chmod 555 libnsl.1.new
          #chmod 444 libnsl.a.new

          #chown bin:bin libnsl.1.new
          #chown bin:bin libnsl.a.new

          #mv libnsl.1 libnsl.1.orig
          #mv libnsl.a libnsl.a.orig

          #mv libnsl.1.new libnsl.1
          #mv libnsl.a.new libnsl.a

          After this, any applications that use libnsl.1 must be
          restarted. Any applications that use libnsl.a must
          be relinked and restarted.
          Any applications that use libc.1 must be restarted.

          Rebooting is the recommended way to restart the applications
          using libnsl.1 or libc.1.

          For B.11.00 and B.11.11
          ====================================
    **REVISED 07**
     --> Remove the preliminary patches with swremove
     --> if they are on the system:

          PHNE_28929.depot #B.11.00
          PHNE_28930.depot #B.11.11

     --> Install the appropriate patch:

     --> PHNE_28982 #B.11.00
     --> PHNE_28983 #B.11.11

          Install libc.1 as follows:

          #DIR=[path to new files]
          #cd /usr/lib
          #cp $DIR/libc.1 libc.1.new
          #chmod 555 libc.1.new
          #chown bin:bin libc.1.new
          #mv libc.1 libc.1.orig
          #mv libc.1.new libc.1

          After this, any applications that use libnsl.1 must be
          restarted. Any applications that use libnsl.a must
          be relinked and restarted.

          Rebooting is the recommended way to restart the applications
          using libnsl.1 or libc.1.

          For B.11.22 IA
          ====================================
          #DIR=[path to new files]
          #cd /usr/lib/hpux32
          #cp $DIR/libnsl.so.1.32_11.22.IA libnsl.so.1.new
          #chmod 555 libnsl.so.1.new
          #chown bin:bin libnsl.so.1.new
          #mv libnsl.so.1 libnsl.so.1.orig
          #mv libnsl.so.1.new libnsl.so.1

          #cd /usr/lib
          #cp $DIR/libc.1 libc.1.new
          #chmod 555 libc.1.new
          #chown bin:bin libc.1.new
          #mv libc.1 libc.1.orig
          #mv libc.1.new libc.1

          #cd /usr/lib/hpux64
          #cp $DIR/libnsl.so.1.64_11.22.IA libnsl.so.1.new
          #chmod 555 libnsl.so.1.new
          #chown bin:bin libnsl.so.1.new
          #mv libnsl.so.1 libnsl.so.1.orig
          #mv libnsl.so.1.new libnsl.so.1

          After this, any applications that use libnsl.so.1 must be
          restarted.

          Rebooting is the recommended way to restart the applications
          using libnsl.1 or libc.1.

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        Use your browser to get to the HP IT Resource Center page
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        NOTE: Using your itrc account security bulletins can be
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        To -gain access- to the Security Patch Matrix, select
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        field specifies "No."

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        http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
        displayProductInfo.pl?productNumber=B6834AA

        The security patch matrix is also available via anonymous
        ftp:

        ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

        On the "Support Information Digest Main" page:
        click on the "HP Security Bulletin Archive".

        The PGP key used to sign this bulletin is available from
        several PGP Public Key servers. The key identification
        information is:

           2D2A7D59
           HP Security Response Team (Security Bulletin signing only)
           <security-alert@hp.com>
           Fingerprint =
             6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59

        If you have problems locating the key please write to
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     D. To report new security vulnerabilities, send email to

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        Please encrypt any exploit information using the
        security-alert PGP key, available from your local key
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     -----------------------------------------------------------------

    (c)Copyright 2003 Hewlett-Packard Company
    Hewlett-Packard Company shall not be liable for technical or
    editorial errors or omissions contained herein. The information
    in this document is subject to change without notice.
    Hewlett-Packard Company and the names of HP products referenced
    herein are trademarks and/or service marks of Hewlett-Packard
    Company. Other product and company names mentioned herein may be
    trademarks and/or service marks of their respective owners.

     ________________________________________________________________

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    --
    Yours truly,
    HP S/W Security Team
    WTEC Cupertino, California
    Return-Path: secure@cup.hp.com
    Reply-to: security-alert@hp.com
    

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