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From: secure@cup.hp.com (Security Alert)
Newsgroups: comp.security.misc
Subject: SB46 Security vulnerability bypassing proper authentication
Date: 10 Jan 1997 03:02:42 GMT
Organization: Hewlett Packard Cupertino Site
Lines: 112
Message-ID: <5b4bgi$ksj@hpax.cup.hp.com>
NNTP-Posting-Host: hpcugsya.cup.hp.com
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-------------------------------------------------------------------------
         HEWLETT-PACKARD SECURITY BULLETIN: #00046, 07 January 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:  Security vulnerability bypassing proper authentication.

PLATFORM: HP 9000 series 700/800 systems running versions HP-UX releases 
          10.10 and 10.20.

DAMAGE:   Unauthorized access

SOLUTION: Apply patch: 
          PHSS_9690 and PHSS_8665 * for HP-UX release 10.10, or 
          PHSS_9627 and PHSS_8667 ** for HP-UX release 10.20).  
                      
AVAILABILITY: All patches are available now.
-------------------------------------------------------------------------

I. 
   A. Background

      It is possible to bypass proper authentication. 

   B. Fixing the problem

      On HP-UX release 10.10 obtain and install patch PHSS_9690. 
      * This patch has a dependency, PHSS_8665

      On HP-UX release 10.20 obtain and install patch PHSS_9627  
      ** This patch has a dependency, PHSS_8667)


   C. Recommended solution

      The necessary patches listed above.  Any future patch superseding 
      those listed will contain the fix.

   D. Impact of the patch

      Replaces dtlogin and dtsession executables in the CDE.CDE-RUN 
      fileset.
   
   E. 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 (US,Canada,
      Asia-Pacific, and Latin-America)

      http://europe-support.external.hp.com  (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        


   F. 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.
________________________________________________________________________