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TUCoPS :: HP/UX :: ciacm006.txt

CIAC M-006 HP-UX telnetd Security Vulnerability


                       The U.S. Department of Energy
                     Computer Incident Advisory Center
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___

                             INFORMATION BULLETIN

                      HP-UX telnetd Security Vulnerability
               [Hewlett-Packard Company Security Bulletin #0172]

October 18, 2001 21:00 GMT                                        Number M-006
PROBLEM:       A potential remotely exploitable buffer overflow exists in 
PLATFORM:      HP9000 Servers running HP-UX releases 10.X only. 
DAMAGE:        An intruder can potentially execute arbitrary code with the 
               privileges of the telnetd process. 
SOLUTION:      Apply patches, or fixes, as outlined below. 
VULNERABILITY  The risk is HIGH. Attacker can potentially get remote root 
ASSESSMENT:    access. 

[***** Start Hewlett-Packard Company Security Bulletin #0172 *****]

    Originally issued: 16 October 2001

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: Systems running telnetd may permit unauthorized remote

          This vulnerability has been assigned the identifier
          CAN-2001-0554 by the Common Vulnerabilities and Exposures
          (CVE) group:

PLATFORM: HP9000 Servers running HP-UX releases 10.X only.

DAMAGE:  An intruder can potentially execute arbitrary code
         with the privileges of the telnetd process.

SOLUTION: Apply the following patches to the release specified.

         10.01       PHNE_24820,
         10.10       PHNE_24820,
         10.20       PHNE_24821,
     SIS 10.20       PHNE_24822 (Telnet kerberos Patch),
         10.24       PHNE_25217.

MANUAL ACTIONS: The Secure Internet Services (SIS) product, if
                enabled, has to be disabled before the installation
                or removal of PHNE_24822 (Telnet kerberos Patch).

AVAILABILITY:   The patches are available now from

  A. Background
      A potential remotely exploitable buffer overflow in telnetd has
      been reported to Hewlett-Packard Company.  It is unique to HP-UX
      releases 10.X only.

  B. Fixing the problem
      Disable telnetd (by commenting out the /etc/inetd.conf entry for
      telnetd and running '/usr/sbin/inetd -c') if telentd is not needed
      on your system.

      Install the appropriate patch from the list below.

  C. Recommended solution

     Apply the following patches to the release specified.

         10.01       PHNE_24820,
         10.10       PHNE_24820,
         10.20       PHNE_24821,
     SIS 10.20       PHNE_24822,
         10.24       PHNE_25217.

     All patches are available now from

  D. 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

     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
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     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
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     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:"

     The security patch matrix is also available via anonymous

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

  E. To report new security vulnerabilities, send email to

     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

     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:  HPSBUX0110-172--------------------------------------

[***** End Hewlett-Packard Company Security Bulletin #0172 *****]


CIAC wishes to acknowledge the contributions of Hewlett-Packard Company for the 
information contained in this bulletin.

CIAC, the Computer Incident Advisory Center, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.

CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
    Voice:    +1 925-422-8193 (7x24)
    FAX:      +1 925-423-8002
    STU-III:  +1 925-423-2604

Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.

   World Wide Web:
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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins.  If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at

This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
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otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.

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