AUSCERT External Security Bulletin Redistribution
           ESB-98.049 -- Hewlett-Packard Security Bulletin: #00077
                 Security Vulnerability with inetd on HP-UX
                                31 March 1998


Hewlett-Packard has released the following advisory concerning their
susceptibility to denial of service attacks.  This vulnerability may allow
networking to be disabled.

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.

NOTE: This is only the original release of the security bulletin.  It will
not be updated when the original bulletin is.  If downloading at a later
date, it is recommended that the bulletin is retrieved from the original
authors to ensure that the information is still current.

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
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.
Facsimile:      (07) 3365 7031

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        HEWLETT-PACKARD SECURITY BULLETIN: #00077, 30 March 1998
- -------------------------------------------------------------------------

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:  Improperly coded routines can result in susceptability to
          denial of service attacks.

PLATFORM: HP9000 Series 7/800 running HP-UX releases 9.X, and 10.X only.

DAMAGE:   Vulnerability may allow networking to be disabled.

SOLUTION: Apply patches listed below.

AVAILABILITY:  All patches are available now.
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   A. Background
      Hewlett-Packard has learned that inetd can terminate prematurely.

   B. Fixing the problem
      The problem can be fixed by applying the appropriate patch
      mentioned below.

      HP-UX release 9.X    HP9000 Series 7/800             PHNE_14085
      HP-UX release 10.00,10.01,10.10 HP9000 Series 7/800  PHNE_14086
      HP-UX release 10.20  HP9000 Series 7/800             PHNE_14087
      HP-UX release 10.24  HP9000 Series 7/800             PHNE_14377

      HP-UX releases 10.30 and 11.X are not affected.

   C. Impact of the patch
      The patch makes inetd more robust to external factors.

   D. To subscribe to automatically receive future NEW HP Security
      Bulletins from the HP Electronic Support Center via electronic
      mail, do the following:

      User your browser to get to the HP Electronic Support Center page
      (for US, Canada, Asia-Pacific, & Latin-America)

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

      Click on the Technical Knowledge Database, register as a user
      (remember to save the User ID assigned to you, and your password),
      and it will connect to a HP Search Technical Knowledge DB page.
      Near the bottom is a hyperlink to our Security Bulletin archive.
      Once in the archive there is another link to our current
      security patch matrix. Updated daily, this matrix is categorized
      by platform/OS release, and by bulletin topic.

   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.
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