AUSCERT External Security Bulletin Redistribution
                     Security Vulnerability in sendmail
                              08 December 1998


Hewlett Packard has released the following bulletin concerning new features
in sendmail 8.8.6 available for HP-UX to combat e-mail spamming and prevent
mail relaying exploitation.

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                        HP Support Information Digests

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Digest Name:  Daily Security Bulletins Digest
    Created:  Mon Dec  7  6:34:58 PST 1998

Table of Contents:

Document ID      Title
- ---------------  -----------
HPSBUX9812-089   Security Vulnerability in sendmail

The documents are listed below.
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Document ID:  HPSBUX9812-089
Date Loaded:  19981206
      Title:  Security Vulnerability in sendmail

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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:  sendmail releases are vulnerable to mail spamming

PLATFORM: HP 9000 series 700/800.

DAMAGE:   Remote users can compromise system integrity.

SOLUTION: Apply the patches below.

AVAILABILITY: All patches are available now.

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   A. Background
      Some important features provided by 8.8.6 includes a new group
      of rulesets to avoid mail "spamming" (i.e., sending of unsolicited
      mail to large number of users) and to prevent mail "spammers"
      from using your host as a mail relay point.

      Sendmail 8.8.6 provides four new named rulesets which can be used
      to check and reject abusive mail messages.

      Patches are available from the Electronic Support Center (ESC)
      patch hub for HP-UX 10.20, 10.30, and 11.0.  An upgrade is
      available for HP-UX 10.00, 10.01, and 10.10.  Hewlett-Packard
      recommends installing sendmail 8.8.6 for HP-UX 10.00, 10.01,
      and 10.10 as an optional version upgrade.  This upgrade is
      not available from the Electronic Support Center (ESC) patch
      hub, but from:


      There are numerous new configuration options available and various
      issues involved in upgrading to Sendmail 8.8.6.  The URL above
      provides additional information regarding the impact of the

   B. Fixing the problem -
      For the HP-UX releases listed below, an official patch is
          For HP-UX release 10.20:  PHNE_12836,
              HP-UX release 10.30:  PHNE_12866,
              HP-UX release 11.00:  PHNE_15509.

      NOTE: The VirtualVault product (HP-UX 10.24) is not affected.

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

      Use your browser to get to the HP Electronic Support Center page

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      The security patch matrix is also available via anonymous ftp:


   D. 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
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     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:  HPSBUX9812-089--------------------------------------

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