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TUCoPS :: HP/UX :: ciacg032.txt

HP Vulnerabilities




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             __________________________________________________________

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

                             INFORMATION BULLETIN

           HP-UX Vulnerabilities in expreserve, rpc.pcnfsd, rpc.statd

July 24, 1996 16:00 GMT                                            Number G-32
______________________________________________________________________________
PROBLEM:       HP has recently released information about fixes to 
               vulnerabilities in expreserve, rpc.pcnfsd, and rpc.statd
               software.
PLATFORM:      Any currently supported version of HPUX 9.X or 10.X.
DAMAGE:        See the HP bulletins below for more information.
SOLUTION:      Read and implement the recommendations and patches described
               below.  See also CIAC Bulletins G-21 for more information on 
               the rpc.pcnfsd vulnerability and G-22 for more information on 
               the rpc.statd vulnerability.
______________________________________________________________________________
VULNERABILITY  These vulnerabilities are widely known -- HP recommends
ASSESSMENT:    implementing the updates described below as soon as possible.
______________________________________________________________________________

[ Begin HP Bulletin ]

- -------------------------------------------------------------------------
      HEWLETT-PACKARD SECURITY BULLETIN: #HPSBUX9607-033, 18 July 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.

- -------------------------------------------------------------------------
PROBLEM:  Vulnerability in /usr/lib/expreserve in HP-UX 9.X and 10.X
PLATFORM: HP 9000 series 300/400s and 700/800s
DAMAGE:   The default permissions of file expreserve(1) are in error,
          thereby allowing users to potentially gain root privileges
          on the host.
SOLUTION: Apply patch PHCO_6363 (series 700/800, HP-UX 9.x), or
                      PHCO_7833 (series 300/400, HP-UX 9.x), or
          perform the actions described below in releases of HP-UX prior
          to 9.X, and in 10.X)

AVAILABILITY: All patches are available now.

_________________________________________________________________________
I. Update

   A.  A private communication to HP described a vulnerability that
   allows ordinary users to potentially gain super-user privileges.
   The default permission for the file /usr/lib/expreserve (or on HP-UX
   10.X /usr/lbin/expreserve) needs only minimal prvileges.  If the
   patches mentioned above are applied the vulnerability cannot be
   exploited.

   In case no patches is available for your host HP-UX release, system
   administrators are asked to perform the following action to achieve
   the same result.

   B. Fixing the problem

   The vulnerability can be eliminated from releases 9.X of HP-UX
   by applying a patch.  Since some patches will not be made available
   on some releases of HP-UX (e.g., prior to 9.X, and now 10.0X),
   affected systems can be protected by system administrators.
   They should:

              $ su root
              # chmod 0555 /usr/lib/expreserve

   In the case of 10.X systems execute the following to affect the link
   target:

              $ su root
              # chmod 0555 /usr/lbin/expreserve

   Hewlett-Packard recommends that all customers concerned with the
   security of their HP-UX systems either apply the appropriate
   patch or perform the actions described above as soon as possible.

   C. How to Install the Patch (for HP-UX 9.x)

     1.  Determine which patch is appropriate for your hardware platform
         and operating system:

                      PHCO_6363 (series 700/800, HP-UX 9.x), or
                      PHCO_7833 (series 300/400, HP-UX 9.x)

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

         To obtain a copy of the HP 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:
                  (http://us.external.hp.com)

     3.  Apply the patch to your HP-UX system.

     4.  Examine /tmp/update.log for any relevant WARNINGs or ERRORs.

    D. Impact

    The patch for HP-UX releases 9.X provides a proper permissions
    /usr/lib/expreserve which fixes the vulnerability.  No patches will
    be available for versions of HP-UX other than 9.X.  Instead, the
    workaround is described above.

    E. 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 an 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:
                           (http://us.external.hp.com)

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

    F. To report new security vulnerabilities, send email to

          security-alert@hp.com

      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
      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.
_______________________________________________________________________

- ----------------------------------------------------------------------------

Description: Security Vulnerability in rpc.pcnfsd & rpc.statd
- ----------------------------------------------------------------------------

- -----------------------------------------------------------------------
HEWLETT-PACKARD SECURITY ADVISORY: #HPSBUX9607-032, 18 July 1996
- -----------------------------------------------------------------------

The information in the following Security Advisory 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 Advisory as soon as possible.

- -----------------------------------------------------------------------
PROBLEM:  Vulnerabilities in rpc.statd and rpc.pcnfsd executables.
PLATFORM: HP 9000/300 and 9000/400 systems running any currently
          supported version of HP-UX 9.X;  HP 9000/700 and 9000/800
          systems running any currently supported version of HP-UX
          9.X or any currently supported version of HP-UX 10.X.
DAMAGE:   The security of the enterprise and its applications could
          be compromised.

SOLUTION: Apply the following patches based on your system hardware
          and Operating System revision for the two problems:

                     PHNE_7371 (series 300/400 HP-UX 9.X) and
                     PHNE_7372 (series 300/400 HP-UX 9.X); or
                     PHNE_7072 (series 700/800 HP-UX 9.X), or
                     PHNE_7073 (series 700/800 HP-UX 10.X), or
                     PHNE_8015 (series 700 HP-UX 9.08 BLS), or
                     PHNE_8016 (series 700 HP-UX 9.09 BLS), or
                     PHNE_8017 (series 700 HP-UX 9.09+ BLS, or
                     PHNE_8018 (series 700 HP-UX 10.09 CMW), or
                     PHNE_8019 (series 700 HP-UX 10.09.01 CMW), or
                     PHNE_8020 (series 700 HP-UX 10.16 CMW).

AVAILABILITY:
          All of the above listed patches are available now via the
          mechanism described below, except for BLS/CMW system patches
          which will be available after 2 Sept.

- -----------------------------------------------------------------------
I.    Rpc.Pcnfsd - CERT(sm) Advisory CA-96.08

   A. Background

      The pcnfsd program (also called rpc.pcnfsd) is an authentication
      and printing program that runs on a UNIX server.  The rpc.pcnfsd
      binary that ships with HP systems contains a vulnerability that
      could allow a user to change permissions on a restricted file or
      directory.

   B. Fixing the problem

      Hewlett Packard is delivering a set of operating system dependent
      patches which contain a new version of rpc.pcnfsd.  Accompanying
      each patch is a README file which discusses the general purpose
      of the patch and describes how to apply it to your system.

   C. Recommended solution

      Apply one of the following patches based on your system hardware
      and operating system revision:

      s300/s400 9.X  - PHNE_7371 (rpc.pcnfsd)
      s700/s800 9.X  - PHNE_7072 (NFS Megapatch)
      s700/s800 10.X - PHNE_7073 (NFS Megapatch)

   D. Impact of the patch

      The patches described above provide a new version of the
      rpc.pcnfsd executable which fixes the vulnerability.

II.   Rpc.Pcnfsd - CERT(sm) Advisory CA-96.08

   A. Background

      The pcnfsd program (also called rpc.pcnfsd) is an authentication
      and printing program that runs on a UNIX server.  The rpc.pcnfsd
      binary that ships with most Unix systems contains a vulnerability
      that could allow users to execute arbitrary commands on the
      machine where pcnfsd runs.

   B. Fixing the problem

      The rpc.pcnfsd daemon that ships with Hewlett Packard systems
      does not make the system call that allows this vulnerability.
      Since HP systems are not vulnerable - there is no fix!

III.  Rpc.Statd - CERT(sm) Advisory CA-96.09

   A. Background

      The statd program (also called rpc.statd) is the status monitor
      program that helps keep track of remote file locks.  It works
      in conjunction with the lockd (also called rpc.lockd) daemon.
      The rpc.statd daemon that ships with HP systems contains a
      vulnerability that could allow a remote user to delete files
      on the system running rpc.statd.

   B. Fixing the problem

      Hewlett Packard is delivering a set of operating system dependent
      patches which contain a new version of rpc.statd.  Accompanying
      each patch is a README file which discusses the general purpose
      of the patch and describes how to apply it to your system.

   C. Recommended solution

      Apply one of the following patches based on your system hardware
      and operating system revision:

      s300/s400 9.X  - PHNE_7372 (rpc.statd)
      s700/s800 9.X  - PHNE_7072 (NFS Megapatch)
      s700/s800 10.X - PHNE_7073 (NFS Megapatch)

   D. Impact of the patch

      The patches described above provide a new version of the
      rpc.statd executable which fixes the vulnerability.

   E. 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:
       (http://us.external.hp.com)

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

   F. To report new security vulnerabilities, send email to

          security-alert@hp.com

      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
      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 HP Bulletin ]

_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of HP 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
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.

CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
    Voice:    +1 510-422-8193
    FAX:      +1 510-423-8002
    STU-III:  +1 510-423-2604
    E-mail:   ciac@llnl.gov

For emergencies and off-hour assistance, DOE, DOE contractor sites,
and the NIH may contact CIAC 24-hours a day. During off hours (5PM -
8AM PST), call the CIAC voice number 510-422-8193 and leave a message,
or call 800-759-7243 (800-SKY-PAGE) to send a Sky Page. CIAC has two
Sky Page PIN numbers, the primary PIN number, 8550070, is for the CIAC
duty person, and the secondary PIN number, 8550074 is for the CIAC
Project Leader.

Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.

   World Wide Web:      http://ciac.llnl.gov/
   Anonymous FTP:       ciac.llnl.gov (128.115.19.53)
   Modem access:        +1 (510) 423-4753 (28.8K baud)
                        +1 (510) 423-3331 (28.8K baud)

CIAC has several self-subscribing mailing lists for electronic
publications:
1. CIAC-BULLETIN for Advisories, highest priority - time critical
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2. CIAC-NOTES for Notes, a collection of computer security articles;
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        subscribe list-name LastName, FirstName PhoneNumber
  e.g., subscribe ciac-notes OHara, Scarlett W. 404-555-1212 x36

You will receive an acknowledgment containing address, initial PIN,
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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins.  If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained by sending email to
docserver@first.org with an empty subject line and a message body
containing the line: send first-contacts.

This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)

G-22: rpc.statd Vulnerability
G-23: Solaris NIS+ Configuration Vulnerability
G-24: FreeBSD Security Vulnerabilities
G-25: SUN statd Program Vulnerability
G-26: IRIX Desktop Permissions Panel Vulnerability
G-27: SCO Kernel Security Vulnerability
G-28A: suidperl Vulnerability
G-29: dip Program Vulnerability
G-30: DEC Software Security Kits
G-31: FreeBSD Security Vulnerabilities (ppp, rdist, and rz)

RECENT CIAC NOTES ISSUED (Previous Notes available from CIAC)

Notes 07 - 3/29/95     A comprehensive review of SATAN

Notes 08 - 4/4/95      A Courtney update

Notes 09 - 4/24/95     More on the "Good Times" virus urban legend

Notes 10 - 6/16/95     PKZ300B Trojan, Logdaemon/FreeBSD, vulnerability
                       in S/Key, EBOLA Virus Hoax, and Caibua Virus

Notes 11 - 7/31/95     Virus Update, Hats Off to Administrators,
                       America On-Line Virus Scare, SPI 3.2.2 Released,
                       The Die_Hard Virus

Notes 12 - 9/12/95     Securely configuring Public Telnet Services, X
                       Windows, beta release of Merlin, Microsoft Word
                       Macro Viruses, Allegations of Inappropriate Data
                       Collection in Win95

Notes 96-01 - 3/18/96  Java and JavaScript Vulnerabilities, FIRST
                       Conference Announcement, Security and Web Search
                       Engines, Microsoft Word Macro Virus Update

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