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TUCoPS :: HP/UX :: ciaci001.txt

HP-UX Denial Of Service Telnet Vulnerability




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             __________________________________________________________

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

                             INFORMATION BULLETIN

                HP-UX Denial of Service via telnet Vulnerability

October 1, 1997 17:00 GMT                                         Number I-001
______________________________________________________________________________
PROBLEM:       A vulnerability has been discoveded in the telnet service
               provided with HP-UX release 10.30.
PLATFORM:      HP 9000 Series 700/800s running HP-UX release 10.30.
DAMAGE:        Denial of Service
SOLUTION:      Apply available patch.
______________________________________________________________________________
VULNERABILITY  Hewlett-Packard recommends that the information in this
ASSESSMENT:    advisory be acted upon as soon as possible.
______________________________________________________________________________

[ Start Hewlett-Packard Advisory ]

Document ID:  HPSBUX9710-070
Date Loaded:  971001
      Title:  Security Bulletin for telnet services in HP-UX rel. 10.30

- -------------------------------------------------------------------------
         HEWLETT-PACKARD SECURITY BULLETIN: #00070, 1 Oct. 1997
- -------------------------------------------------------------------------

 The information in the following Security Bulletin should be acted upon
 as soon as possible.  Hewlett Packard 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 denial of service (DOS) attack via the telnet service

PLATFORM: HP 9000 Series 700/800s running HP-UX release 10.30

DAMAGE:   Denial of Service on systems running HP-UX release 10.30.

SOLUTION: Apply the following patch:
                 PHNE_12608 for HP-UX release 10.30

AVAILABILITY: The patch is available now.
- -------------------------------------------------------------------------
I.
   A. Background
      Hewlett-Packard Company has discovered a defect in the telnet
      service provided with HP-UX release 10.30.  Under some circumstances
      this defect could be used to cause a denial of service on the
      destination HP-UX release 10.30 system.

   B. Fixing the problem
      Install patch PHNE_12608 on all HP-UX release 10.30 systems.

   C. Recommended solution
      The patch is a cumulative patch and and fully fixes the discovered
      vulnerability.

   D. To subscribe to automatically receive future NEW HP Security
      Bulletins from the HP SupportLine Digest service via electronic
      mail, do the following:

      1)  From your Web browser, access the URL:

          http://us-support.external.hp.com
          (for US,Canada, Asia-Pacific, and Latin-America)

          http://europe-support.external.hp.com  (for Europe)

      2)  On the HP Electronic Support Center main screen, select
          the hyperlink "Support Information Digests".

      3)  On the "Welcome to HP's Support Information Digests" screen,
          under the heading "Register Now", select the appropriate
          hyperlink "Americas and Asia-Pacific", or "Europe".

      4)  On the "New User Registration" screen, fill in the fields for
          the User Information and Password and then select the button
          labeled "Submit New User".

      5)  On the "User ID Assigned" screen, select the hyperlink
          "Support Information Digests".

          ** Note what your assigned user ID and password are for
            future reference.

      6)  You should now be on the "HP Support Information Digests Main"
          screen.  You might want to verify that your email address is
          correct as displayed on the screen.  From this screen, you may
          also view/subscribe to the digests, including the security
          bulletins digest.

      To get a patch matrix of current HP-UX and BLS security patches
      referenced by either Security Bulletin or Platform/OS, click on
      following screens in order:
         Technical Knowledge Database
         Browse Security Bulletins
         Security Bulletins Archive
         HP-UX Security Patch Matrix

   E. 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:  HPSBUX9710-070--------------------------------------

[ End Hewlett-Packard Advisory ]

______________________________________________________________________________

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


CIAC, the Computer Incident Advisory Capability, 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:    +1 510-422-8193
    FAX:      +1 510-423-8002
    STU-III:  +1 510-423-2604
    E-mail:   ciac@llnl.gov

For emergencies and off-hour assistance, DOE, DOE contractor sites,
and the NIH may contact CIAC 24-hours a day. During off hours (5PM -
8AM PST), call the CIAC voice number 510-422-8193 and leave a message,
or call 800-759-7243 (800-SKY-PAGE) to send a Sky Page. CIAC has two
Sky Page PIN numbers, the primary PIN number, 8550070, is for the CIAC
duty person, and the secondary PIN number, 8550074 is for the CIAC
Project Leader.

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

   World Wide Web:      http://ciac.llnl.gov/
   Anonymous FTP:       ciac.llnl.gov (198.128.39.53)
   Modem access:        +1 (510) 423-4753 (28.8K baud)
                        +1 (510) 423-3331 (28.8K baud)

CIAC has several self-subscribing mailing lists for electronic
publications:
1. CIAC-BULLETIN for Advisories, highest priority - time critical
   information and Bulletins, important computer security information;
2. CIAC-NOTES for Notes, a collection of computer security articles;
3. SPI-ANNOUNCE for official news about Security Profile Inspector
   (SPI) software updates, new features, distribution and
   availability;
4. SPI-NOTES, for discussion of problems and solutions regarding the
   use of SPI products.

Our mailing lists are managed by a public domain software package
called Majordomo, which ignores E-mail header subject lines. To
subscribe (add yourself) to one of our mailing lists, send the
following request as the E-mail message body, substituting
ciac-bulletin, ciac-notes, spi-announce OR spi-notes for list-name:

E-mail to       ciac-listproc@llnl.gov or majordomo@tholia.llnl.gov:
        subscribe list-name
  e.g., subscribe ciac-notes

You will receive an acknowledgment email immediately with a confirmation
that you will need to mail back to the addresses above, as per the
instructions in the email.  This is a partial protection to make sure
you are really the one who asked to be signed up for the list in question.

If you include the word 'help' in the body of an email to the above address,
it will also send back an information file on how to subscribe/unsubscribe,
get past issues of CIAC bulletins via email, etc.

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 http://www.first.org/.

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
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
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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