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             AUSCERT External Security Bulletin Redistribution

       ESB-2001.428 -- HP Support Information Digests HPSBUX0107-156
               Sec. Vulnerability in setrlimit(1M) (rev. 1)
                              15 October 2001

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

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

Product:                HP-UX
Vendor:                 Hewlett-Packard
Operating System:       HP-UX 10.01
                        HP-UX 10.10
                        HP-UX 10.20
                        HP-UX 10.24
                        HP-UX 10.26
                        HP-UX 11.00
                        HP-UX 11.04
                        HP-UX 11.11
Platform:               HP9000 Series 700
                        HP9000 Series 800
Impact:                 Denial of Service
Access Required:        Existing Account

Ref:                    ESB-2001.269

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Document ID:  HPSBUX0107-156_
Date Loaded:  20011008
      Title:  Sec. Vulnerability in setrlimit(1M) (rev. 1)

- ---------------------------------------------------------------
    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0156,
    Originally issued 2 July '01
    Last changed: 08 October '01
 ---------------------------------------------------------------

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:  The setrlimit() allows incorrect core files

** Rev.1 **
PLATFORM: HP9000 Series 700/800 running HP-UX releases 10.01, 10.10,
- ---->>>>  10.20, 10.24, 10.26, 11.04, and 11.00 only.

DAMAGE:   Possible denial of service

SOLUTION: Install the appropriate patch for the HP-UX release:
** Rev.1 **
             11.11                          PHKL_23423,
             11.04                          PHKL_23886,
             11.00                          PHKL_23628,
             10.20 700                      PHKL_22701,
             10.20 800                      PHKL_22702,
             10.24 700                      PHKL_24249,
             10.24 800                      PHKL_24250,
 ---->>>>    10.26 700                      PHKL_25243,
 ---->>>>    10.26 800                      PHKL_25244,
             10.10 700                      PHKL_23477,
             10.10 800                      PHKL_23478,
             10.01 700                      PHKL_23512,
             10.01 800                      PHKL_23513.

MANUAL ACTIONS: None

AVAILABILITY:   The patches are available now.

CHANGE SUMMARY: Updated patch information.
 ---------------------------------------------------------------
 A. Background
    Hewlett-Packard has discovered that a process that at one time was
    setuid/setgid could create corefiles or be attached to with a
    debugger.  If the process core file's size limit has been set to 0
    in setrlimit(), when the process aborts, the core processing is
    incorrect.

 B. Recommended solution
    After applying this patch, the kernel now remembers that the
    process was at one time setuid/setgid, and disallow corefiles
    and debugger attachment.  If the process core file size limit
    has been set to zero, it obeys.

    Application of the appropriate patch selected from the list below
    completely solves this problem.

** Rev.1 **
    For HP-UX release:
           11.11                          PHKL_23423,
           11.04                          PHKL_23886,
           11.00                          PHKL_23628,
           10.20 700                      PHKL_22701,
           10.20 800                      PHKL_22702,
           10.24 700                      PHKL_24249,
           10.24 800                      PHKL_24250,
 ---->>>>  10.26 700                      PHKL_25243,
 ---->>>>  10.26 800                      PHKL_25244,
           10.10 700                      PHKL_23477,
           10.10 800                      PHKL_23478,
           10.01 700                      PHKL_23512,
           10.01 800                      PHKL_23513.

    Note: Many of these patches have dependencies.  A reboot will
          be required.

 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.itrc.hp.com:~ftp/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:  HPSBUX0107-156_-------------------------------------

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