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             AUSCERT External Security Bulletin Redistribution

 ESB-2002.504 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0209-215
               Security Vulnerability in XDR library (rev.1)
                             13 September 2002

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                XDR library
Vendor:                 Hewlett-Packard
Operating System:       HP-UX 10.20
                        HP-UX 11.00
                        HP-UX 11.11
                        HP-UX 11.22
Platform:               HP9000 Series 700/800
Impact:                 Execute Arbitrary Code/Commands
                        Denial of Service
Access Required:        Remote

Ref:                    ESB-2002.394
                        ESB-2002.497

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Document ID:  HPSBUX0209-215
Date Loaded:  20020909
      Title:  Security Vulnerability in XDR library (rev.1)

 -----------------------------------------------------------------
 **REVISED 01**
 HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0209-215
 Originally issued: 09 September 2002
 Last revised: 12 September 2002
 SSRT2336 Security Vulnerability in XDR library
 -----------------------------------------------------------------

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: Potential buffer overflow in XDR library.

PLATFORM: HP 9000 Series 700 and 800 10.20, 11.00, 11.11, and 11.22

DAMAGE: Potential unauthorized access, denial of service.

SOLUTION: Until patches are available manually install the 
          appropriate fixed libraries.

MANUAL ACTIONS: Yes - NonUpdate
                Install the appropriate fixed libraries.
                Relink any archived programs that call
                xdr_array().

AVAILABILITY:  This bulletin will be updated when patches are
               available.

CHANGE SUMMARY: Rev.01 - corrected "strings" to "strings -a"
 ------------------------------------------------------------------ 
 A. Background
    CERT Advisory CA-2002-25 reports an integer overflow in 
    certain implementations of XDR libraries.  Libraries supplied
    with HP-UX 10.20, 11,00, 11.11, and 11.22 are potentially
    vulnerable.

    In addition, cross-reference:
    HP Tru64 UNIX: Case id: SSRT2309 rpc XDR_ARRAY
       A solution is available as noted in the recent
       security bulletin SSSRT2275 at
       http://thenew.hp.com/country/us/eng/support.html
       Use the SEARCH IN feature box, enter SSRT2275 in the
       search window.


 B. Recommended solution
    Until patches are released download and manually install
    the appropriate libraries.
 
    Note:  It will be necessary to relink any programs that
    call xdr_array() and are linked with archived libraries.
    There are no known programs supplied by HP which need to
    be relinked.  To test an archived program:

 **REVISED 01**
- -->>   strings -a suspect_program | grep xdr_array:

    If the command above returns "xdr_array: out of memory"
    the suspect_program will need to the relinked with a 
    fixed library.

    Download the appropriate files from:

     System:    hprc.external.hp.com  (192.170.19.51)
     Login:     xdr
     Password:  xdr1

     FTP Access: ftp://xdr:xdr1@hprc.external.hp.com/
             or: ftp://xdr:xdr1@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.


     The files are:

        PHCO_26152.depot.gz

        libnsl.1.32_11.00.gz
        libnsl.a.32_11.00.gz
        libnsl.1.64_11.00.gz
        libnsl.a.64_11.00.gz

        libnsl.1.32_11.11.gz
        libnsl.a.32_11.11.gz
        libnsl.1.64_11.11.gz
        libnsl.a.64_11.11.gz

        libnsl.1.32_11.22.PA.gz
        libnsl.a.32_11.22.PA.gz
        libnsl.1.64_11.22.PA.gz
        libnsl.a.64_11.22.PA.gz

        libnsl.so.1.32_11.22.IA.gz
        libnsl.so.1.64_11.22.IA.gz


    The cksum output:


        2238979170 9676800 PHCO_26152.depot
        3064646304 679936 libnsl.1.32_11.00
        498505157 817544 libnsl.a.32_11.00
        2630827583 648296 libnsl.1.64_11.00
        2205456871 1454504 libnsl.a.64_11.00

        744618112 724992 libnsl.1.32_11.11
        3459917079 783940 libnsl.a.32_11.11
        3659675326 702416 libnsl.1.64_11.11
        3120598258 1520436 libnsl.a.64_11.11

        2108927814 724992 libnsl.1.32_11.22.PA
        4022226526 755840 libnsl.a.32_11.22.PA
        3156983214 693992 libnsl.1.64_11.22.PA
        2834445134 1441476 libnsl.a.64_11.22.PA

        2227616066 1490048 libnsl.so.1.32_11.22.IA
        3162410426 1564768 libnsl.so.1.64_11.22.IA

      Copy the appropriate files to a secure directory,
      for example /.  Then,

      For 10.20
      ====================================
      Install PHCO_26152.depot:
      swinstall -x autoreboot=true -x match_target=true \
                        -s /PHCO_26152.depot


      After this any applications that use the RPC/XDR APIs
      in libc.1 must be restarted.  Any applications that use
      the RPC/XDR APIs in libc.a must be relinked and restarted.

      Note: It may be preferable to reboot the system rather 
      than attempting to identify applications using the 
      RPC/XDR APIs in libc.1.

      For 11.00
      ====================================
      #cd /usr/lib
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.32_11.00 libnsl.1
      #cp /libnsl.a.32_11.00 libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

      #cd /usr/lib/pa20_64
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.64_11.00 libnsl.1
      #cp /libnsl.a.64_11.00 libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

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

      For 11.11
      ====================================
      #cd /usr/lib
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.32_11.11 libnsl.1
      #cp /libnsl.a.32_11.11 libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

      #cd /usr/lib/pa20_64
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.64_11.11 libnsl.1
      #cp /libnsl.a.64_11.11 libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

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

      For 11.22 PA
      ====================================
      #cd /usr/lib
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.32_11.22.PA libnsl.1
      #cp /libnsl.a.32_11.22.PA libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

      #cd /usr/lib/pa20_64
      #mv libnsl.1 libnsl.1.orig
      #mv libnsl.a libnsl.a.orig
      #cp /libnsl.1.64_11.22.PA libnsl.1
      #cp /libnsl.a.64_11.22.PA libnsl.a
      #chmod 555 libnsl.1
      #chmod 444 libnsl.a
      #chmod -R bin:bin libnsl.1
      #chmod -R bin:bin libnsl.a.

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


      For 11.22 IA
      ====================================
      #cd /usr/lib/hpux32
      #mv libnsl.so.1 libnsl.so.1.orig
      #cp /libnsl.so.1.32_11.22.IA libnsl.so.1
      #chmod 555 libnsl.so.1
      #chmod -R bin:bin libnsl.so.1

      #cd   /usr/lib/hpux64
      #mv libnsl.so.1 libnsl.so.1.orig
      #cp libnsl.so.1.64_11.22.IA libnsl.so.1
      #chmod 555 libnsl.so.1
      #chmod -R bin:bin libnsl.so.1

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


 C. To subscribe to automatically receive future NEW HP Security
    Bulletins from the HP IT Resource Center via electronic
    mail, do the following:

    Use your browser to get to the HP IT Resource Center page
    at:

       http://itrc.hp.com

    Use the 'Login' tab at the left side of the screen to login
    using your ID and password.  Use your existing login or the
    "Register" button at the left to create a login, in order to
    gain access to many areas of the ITRC.  Remember to save the
    User ID assigned to you, and your password.

    In the left most frame select "Maintenance and Support".

    Under the "Notifications" section (near the bottom of
    the page), select "Support Information Digests".
     
    To -subscribe- to future HP Security Bulletins or other
    Technical Digests, click the check box (in the left column)
    for the appropriate digest and then click the "Update
    Subscriptions" button at the bottom of the page.

    or

    To -review- bulletins already released, select the link
    (in the middle column) for the appropriate digest.

    To -gain access- to the Security Patch Matrix, select
    the link for "The Security Bulletins Archive".  (near the
    bottom of the page)  Once in the archive the third link is
    to the current Security Patch Matrix. Updated daily, this
    matrix categorizes security patches by platform/OS release,
    and by bulletin topic.  Security Patch Check completely
    automates the process of reviewing the patch matrix for
    11.XX systems.

    For information on the Security Patch Check tool, see:
    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".

 D. To report new security vulnerabilities, send email to

    security-alert@hp.com

    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)
    of 'get key' (no quotes) to security-alert@hp.com.

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin is not edited or changed in
    any way, is attributed to HP, and provided such reproduction
    and/or distribution is performed for non-commercial purposes.

    Any other use of this information is prohibited. HP is not
    liable for any misuse of this information by any third party.
 ________________________________________________________________
- -----End of Document ID:  HPSBUX0209-215--------------------------------------

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