TUCoPS :: HP/UX :: ciach004.txt

HP-UX Ping Vulnerability



                       The U.S. Department of Energy
                    Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___

                             INFORMATION BULLETIN

                           HP-UX  Ping Vulnerability

November 4, 1996 11:00 GMT                                         Number H-04
PROBLEM:       A vulnerability exists with certain ICMP echo requests (ping) 
               that can cause an HP-UX system to reboot. 
PLATFORM:      HP-UX 9.x and 10.x 
DAMAGE:        External users can cause a system to reboot. 
SOLUTION:      Apply the system patches recommended by HP. 
VULNERABILITY  Any unpatched HP-UX system that answers Ping requests can be 
ASSESSMENT:    shut down by an external user. 
                            HP-UX Ping Vulnerability

The following advisory was issued by Hewlett-Packard concerning the vulnerability with incoming Ping packets. Users should follow the instructions contained in this bulletin and install the indicated patch.
- ------------------------------------------------------------------------
      HEWLETT-PACKARD SECURITY BULLETIN: #000040, 30 October 1996
- ------------------------------------------------------------------------

Hewlett-Packard recommends that 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.

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

Any other use of this information is prohibited. HP is not liable
for any misuse of this information by any third party.

PROBLEM:  Vulnerability with specific incoming ICMP Echo Request (ping)
PLATFORM: HP9000 Series 700 and 800 systems.
DAMAGE:   Vulnerability makes it possible for an external user to
          cause a system reboot.
SOLUTION: Apply the following patch:

          Patch Name(Platform/OS)   | Notes
          PHNE_9027 (s700 9.01)     : PHNE_7704 must first be installed
          PHNE_9028 (s700 9.03/5/7) : PHNE_7252 must first be installed
          PHNE_9030 (s700 10.00)    :             No patch dependencies
          PHNE_9032 (s700 10.01)    : PHNE_8168 must first be installed
          PHNE_9034 (s700 10.10)    : PHNE_8063 must first be installed
          PHNE_9036 (s700 10.20)    :             No patch dependencies
          PHNE_8672 (s800 9.00)     : PHNE_7197 must first be installed
          PHNE_9029 (s800 9.04)     : PHNE_7317 must first be installed
          PHNE_9031 (s800 10.00)    :             No patch dependencies
          PHNE_9033 (s800 10.01)    : PHNE_8169 must first be installed
          PHNE_9035 (s800 10.10)    : PHNE_8064 must first be installed
          PHNE_9037 (s800 10.20)    :             No patch dependencies

          Due to the critical nature of this defect, HP is introducing
          this as a non-cumulative patch.  As a result, in cases where
          a dependency exists, the current ARPA Transport cumulative
          patch will need to be installed first.  The two can be
          installed in the same session to minimize system downtime,
          but the prerequisite patch must be loaded first.
          Installation will fail if this is not the case.

AVAILABILITY: All patches are available now.

I. Update

   A. Problem description

   A recent mailing list disclosure described a vulnerability in which
   specific, illegally formatted, incoming ICMP Echo Request (ping)
   traffic could cause a system reboot on some HP9000 Series 700,
   and 800 systems running HP-UX releases 9.X and 10.X.  HP9000 Series
   300 and 400 systems have not been found to be vulnerable.

   B. Fixing the problem

   The vulnerability can be eliminated from HP-UX releases 9.X and 10.X
   by applying either one or two patches.

   C. How to Install the Patch:

     1.  Determine which patch(es) are appropriate for your hardware
         platform and operating system.

     2.  Hewlett-Packard's HP-UX patches are available via email
         and the World Wide Web

         To obtain a copy of the Hewlett-Packard SupportLine email
         service user's guide, send the following in the TEXT PORTION
         OF THE MESSAGE to support@us.external.hp.com (no Subject
         is required):

                               send guide

         The users guide explains the HP-UX patch downloading process
         via email and other services available.

         World Wide Web service for downloading of patches
         is available via our URL:

     3.  Apply the patch(es) to your HP-UX system.  In cases where
         a dependency exists, the current ARPA Transport cumulative
         patch will need to be installed first.  The two can be
         installed in the same session to minimize system downtime,
         but the prerequisite patch must be loaded first.  Installation
         will fail if this is not the case.

     4.  Examine /tmp/update.log (9.X), or /var/adm/sw/swinstall.log
         (10.X), for any relevant WARNINGs or ERRORs.

   D. Impact

   The patches for HP-UX releases 9.X and 10.X provide enhancements
   in the ARPA Transport stack to avoid this vulnerability.

   E. HP SupportLine

   To subscribe to automatically receive future NEW HP Security
   Bulletins from the HP SupportLine mail service via electronic mail,
   send an email message to:

          support@us.external.hp.com   (no Subject is required)

   Multiple instructions are allowed in the TEXT PORTION OF THE MESSAGE,
   here are some basic instructions you may want to use:

   To add your name to the subscription list for new security bulletins,
   send the following in the TEXT PORTION OF THE MESSAGE:

          subscribe security_info

   To retrieve the index of all HP Security Bulletins issued to date,
   send the following in the TEXT PORTION OF THE MESSAGE:

          send security_info_list

   To get a patch matrix of current HP-UX and BLS security patches
   referenced by either Security Bulletin or Platform/OS, put the
   following in the text portion of your message:

          send hp-ux_patch_matrix

   World Wide Web service for browsing of bulletins is available via
   our URL:

          Choose "Support news", then under Support news,
          choose "Security Bulletins"

   F. To report new security vulnerabilities, send email to


   Please encrypt 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

CIAC wishes to acknowledge the contributions of Hewlett Packard for the 
information contained in this bulletin.

CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
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global organization established to foster cooperation and coordination
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For emergencies and off-hour assistance, DOE, DOE contractor sites,
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This document was prepared as an account of work sponsored by an
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