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             AUSCERT External Security Bulletin Redistribution

              ESB-2002.050 -- HP Support Information Digests
           HPSBUX0201-181 - Sec. Vulnerability in IPFilter/9000
                              25 January 2002

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                IPFilter/9000
Vendor:                 Hewlett-Packard
Operating System:       HP-UX 11.00
                        HP-UX 11.11
Impact:                 Inappropriate Access

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Document ID:  HPSBUX0201-181
Date Loaded:  20020123
      Title:  Sec. Vulnerability in IPFilter/9000

- -----------------------------------------------------------------
    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0181,
    Originally issued: 23 January 2002
 -----------------------------------------------------------------

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.

 ------------------------------------------------------------------
PROBLEM:  IPFilter fragment rule bypass vulnerability

PLATFORM: IPFilter/9000 product running on HP-UX 11.00 or 11.11

DAMAGE: A malicious user can change IPFilter's handling of packets.

SOLUTION: Upgrade to IPFilter/9000 version A.03.05.02 or greater

MANUAL ACTIONS: Install new software version

AVAILABILITY: IPFilter/9000 version A.03.05.02 is available in the
following places:
  1) On www.software.hp.com.  Go to the "internet & security"
     section to get a free download.
  2) Available on the December 2001 HP-UX Application Release (AR)
     CD.  IPFilter/9000 is free and has no codeword protection on
     this CD.
  3) Available as a selectable option on the December 2001 HP-UX
     Operating Environment (OE).

 ------------------------------------------------------------------
A. Background
   This problem was reported as bugtraq #2545 on the SecurityFocus
   website.

B. Fixing the problem
   A fix has been made to the Open Source version of ipfilter.
   This fix has been ported to the HP supported version of
   ipfilter (called IPFilter/9000).

C. Recommended solution
   Upgrade to IPFilter/9000 version A.03.05.02 or greater.

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

   Use your browser to get to the HP IT Resource Center page
   at:

     http://itrc.hp.com

   Use the 'Login' tab at the left side of the screen to login
   using your ID and password.  Use your existing login or the
   "Register" button at the left to create a login, in order to
   gain access to many areas of the ITRC.  Remember to save the
   User ID assigned to you, and your password.

   In the left most frame select "Maintenance and Support".

   Under the "Notifications" section (near the bottom of
   the page), select "Support Information Digests".

   To -subscribe- to future HP Security Bulletins or other
   Technical Digests, click the check box (in the left column)
   for the appropriate digest and then click the "Update
   Subscriptions" button at the bottom of the page.

   or

   To -review- bulletins already released, select the link
   (in the middle column) "Search Technical Knowledge
   Database".

   To -gain access- to the Security Patch Matrix, or the
   "The Security Bulletins Archive" select the link for
   "The Security Bulletins Archive" (near the bottom of
   the page).  Once in the archive the third link is
   to the current Security Patch Matrix. Updated daily, this
   matrix categorizes security patches by platform/OS release,
   and by bulletin topic.  Security Patch Check completely
   automates the process of reviewing the patch matrix for
   11.XX systems.

   For information on the Security Patch Check tool, see:
   http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
   displayProductInfo.pl?productNumber=B6834AA"

   The security patch matrix is also available via anonymous
   ftp:

    ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix

   On the "Support Information Digest Main" page:
   click on the "HP Security Bulletin Archive".


E. 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.
 ________________________________________________________________
- -----End of Document ID:  HPSBUX0201-181--------------------------------------

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