AUSCERT External Security Bulletin Redistribution
                     Security Vulnerability in vacation
                              17 November 1998


Hewlett Packard has released the following bulletin concerning a
vulnerability in the vacation program shipped with HP-UX. This
vulnerability may allow remote users to modify system files.

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Digest Name:  Daily Security Bulletins Digest
    Created:  Mon Nov 16  3:00:03 PST 1998

Table of Contents:

Document ID      Title
- ---------------  -----------
HPSBUX9811-087   Security Vulnerability in vacation

The documents are listed below.
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Document ID:  HPSBUX9811-087
Date Loaded:  19981115
      Title:  Security Vulnerability in vacation

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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.

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PROBLEM: The vacation program erroneously passes parameters to sendmail.

PLATFORM: HP 9000 series 700/800 running HP-UX releases 9.X, 10.X
          and 11.0.

DAMAGE:  Remote users could modify system files.

SOLUTION: Install the patches listed below.

AVAILABILITY:  All patches are available now.

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   A. Background
      The vacation program shipped with HP-UX in /usr/bin/vacation
      suffers from a fault in that it misunderstands it's inputs and
      invokes sendmail with the wrong parameters.  Both sendmail 5.65
      and 8.7.6 are vulnerable to this malady.  Also the vacation
      program ignores a TO: header when the "O" is upper case.

   B. Fixing the problem
      Install the applicable patch:

       HP-UX revision 11.X for HP9000 Series 7/800:       PHNE_16295
       HP-UX revision 10.20 for HP9000 Series 7/800:      PHNE_14042
       HP-UX revision 10.0X-10 for HP9000 Series 7/800:   PHNE_16726
       HP-UX revision 9.X  for HP9000 Series 7/800:       PHNE_16725

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- -----End of Document ID:  HPSBUX9811-087--------------------------------------

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