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             AUSCERT External Security Bulletin Redistribution

       ESB-2001.405 -- HP Support Information Digests HPSBUX0109-167
                        Sec. Vulnerability in cu(1)
                             27 September 2001

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

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

Product:                cu(1)
Vendor:                 Hewlett-Packard
Operating System:       HP-UX 11.11
                        HP-UX 11.00
                        HP-UX 11.04
                        HP-UX 10.20
                        HP-UX 10.10
                        HP-UX 10.01
Platform:               HP9000 Series 700
                        HP9000 Series 800
Impact:                 Denial of Service
Access Required:        Existing Account

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Document ID:  HPSBUX0109-167
Date Loaded:  20010923
      Title:  Sec. Vulnerability in cu(1)

- ---------------------------------------------------------------
    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0167,
    Originally issued: 24 September '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.

 ---------------------------------------------------------------

ISSUE:    The cu(1) command has a buffer overflow problem.

PLATFORM: HP9000 Series 700/800 running HP-UX releases 11.11,
          11.00, 11.04, 10.20, 10.10, and 10.01.

POSSIBLE RESULT: Users could cause a denial of service (DoS).

SOLUTION: Install the appropriate patch for the HP-UX release:
                    for 11.11:               PHCO_23909,
                        11.00:               PHCO_22766,
                        11.04  (VVOS):       PHCO_23424,
                        10.20:               PHCO_22764,
                        10.10:               PHCO_22765,
                        10.01:               PHCO_22763.

MANUAL ACTIONS: None

AVAILABILITY: The patches are available now.
 ---------------------------------------------------------------

 A.  Background
     Hewlett-Packard Company has become aware of a defect in the
     the cu(1) command, typically used for host to host
     communication.

 B.  Recommended actions
     The problem can be fully resolved by applying the appropriate
     patches to the system. For HP-UX releases
                  11.11:                    PHCO_23909,
                  11.00:                    PHCO_22766,
                  11.04  (VVOS):            PHCO_23424,
                  10.20:                    PHCO_22764,
                  10.10:                    PHCO_22765,
                  10.01:                    PHCO_22763.

     Note: The HP-UX 10.01 patch has dependencies.  There is no
           patch requirement for HP-UX 10.24.

 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:  HPSBUX0109-167--------------------------------------


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