AUSCERT External Security Bulletin Redistribution

	   ESB-97.125 -- Hewlett-Packard Security Bulletin: #00070
                               2 October 1997


Hewlett-Packard has released the following advisory concerning a vulnerability
in the telnet service.  This vulnerability may allow a denial of service
attack against systems running HP-UX release 10.30.

The following security bulletin is provided as a service to AUSCERT's
members.  As AUSCERT did not write this document, AUSCERT has had no
control over its content.  As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.

Contact information for HP is included in the Security Bulletin below.
If you have any questions or need further information, please contact them

Previous advisories and external security bulletins can be retrieved from:


If you believe that your system has been compromised, contact AUSCERT or your
representative in FIRST (Forum of Incident Response and Security Teams).

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 4477
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
	AUSCERT personnel answer during Queensland business hours
	which are GMT+10:00 (AEST).
	On call after hours for emergencies.

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

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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.
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   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

   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:

          (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


      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

   Any other use of this information is prohibited.  HP is not liable
   for any misuse of this information by any third party.
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