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TUCoPS :: HP/UX :: ciaci027.txt

HP-UX Cue CDe Land Vulnerabilities




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             __________________________________________________________

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

                             INFORMATION BULLETIN

                     HP-UX Vulnerabilities (CUE, CDE, land)

February 24, 1998 18:00 GMT                                      Number I-027b
______________________________________________________________________________
PROBLEM:       Three vulnerabilities have been identified by Hewlett-Packard.
               1) /[usr/]bin/cue (known as CUE) has published security flaws
               2) dtappgather program in CDE
               3) land on HP-UX
PLATFORM 1:    HP9000 series 800, releases HP-UX 8.X, 9.X, 10.X, and 11.0
PLATFORM 2:    HP9000 Series 700/800s running CDE on: HP-UX 10.10, HP-UX
               10.20, HP-UX 10.24 (VVOS), HP-UX 11.00
PLATFORM 3:    HP9000 Series 7/800 running HP-UX releases 9.X, 10.X, and 11.00
DAMAGE:        1) Users may gain unauthorized privileges
               2) May gain unauthorized access or denial of service.
               3) Users on the network may cause system hangs.
SOLUTION:      1) Remove, disable or render the executable unusable.
               2 & 3) Apply patches listed below.
______________________________________________________________________________
VULNERABILITY  Hewlett-Packard urges you to acted upon these solutions as soon
ASSESSMENT:    as possible.
______________________________________________________________________________
[ Update to I-027a on February 24, 1998 with addition patch information on
  Advisory #3]

[ Start Hewlett-Packard Advisories ]


1) /[usr/]bin/cue (known as CUE)

Document ID:  HPSBUX9801-074
Date Loaded:  980121
      Title:  Security Vulnerability in CUE under HP-UX

- -------------------------------------------------------------------------
       HEWLETT-PACKARD SECURITY BULLETIN: #00074, 21 January 1998
- -------------------------------------------------------------------------

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: /[usr/]bin/cue (known as CUE) has published security flaws.

PLATFORM: HP9000 series 800, releases HP-UX 8.X, 9.X, 10.X, and 11.0

DAMAGE:  Users can gain unauthorized privileges.

SOLUTION: Remove, disable or otherwise render the executable unusable.

AVAILABILITY: N/A

- -------------------------------------------------------------------------
I.
   A. Background
      Hewlett-Packard has been shipping Character-Terminal User Environment
      (CUE) on its releases of HP-UX for Series 800 systems.  These
      multi-user systems support specific terminal types capable of running
      Terminal Session Manager (TSM), including PC's and other non-HP
      character based terminals.  Of these, CUE is compatible only with
      the following terminals:
        HP700/92   HP700/94   HP2392   HP2394   VT320   VT100   WYSE60

      CUE was intended to provide functionality in for terminal based
      sessions similar to that of CDE for X windows based session.
      CDE currently provides a richer functionality.

      A security vulnerability has been made public which allows non-root
      users to manipulate any file.

   B. Fixing the problem
      Since the release of HP-UX 10.30 (a developers release), the HP-UX
      CUE system is officially obsolete, and has been deprecated in HP-UX
      release 11.0.  There will be no patches released to solve this issue.

      Hewlett-Packard Company strongly recommends that system
      administrators disable or remove cue from their systems, due to the
      nature of this problem.  No upgrades from existing releases
      currently in use are necessary.

   C. Recommended solution

      The product has shipped in recent releases of HP-UX as a setuid
      program.  The default location for this product is /usr/bin/ and
      can be disabled with:

           chmod 000 /usr/bin/cue    or   rm /usr/bin/cue

      For releases of HP-UX 10.X which support Software Distributor (SD)
      issue the swmodify command as follows:

           /usr/sbin/swmodify -x files="/usr/bin/cue" OS-Core.CMDS-MIN

      In release HP-UX 9.X and earlier, the default location is /bin/cue.
      Both cue and cuegetty are in /bin.

      Cleanup of miscellaneous files associated with the product should
      also be performed at this time.  Specifically system administrators
      should examine:
          /[usr/s]bin/cuegetty               (remove entirely),
          /etc/inittab      (remove references to cue and cuegetty),
          .login            (remove references to cue),
          /usr/lbin/cuesession               (remove entirely),
          /usr/newconfig/etc/cue.inittab     (remove entirely),
          /usr/[old/]newconfig/etc/cue.dm          (remove entirely),
          /etc/cue.dm                        (remove entirely),
          /usr/lib/nls/msg/C/cue.cat         (remove entirely),
            (cue.cat is the message catalog for localizations).

      This is the official recommendation from Hewlett-Packard Company.

   D. Current product status

      Hewlett-Packard Company's recommendation is due to the rescoping of
      product direction, coupled with the discontinued access to necessary
      third party code.  As a result no changes to its functionality will
      be made now, nor at any time in the future.  In the HP-UX release
      10.30 release notes, developers were informed of pending product
      obsolescence.

      Hewlett-Packard recommends that all customers concerned with the
      security of their HP-UX systems remove CUE (or verify that it is
      not installed).

      Again, no patches will be available for any releases of HP-UX.

      If further assistance is desired please contact your HP Support
      Representative.


   D. 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 at:

      http://us-support.external.hp.com
      (for US, Canada, Asia-Pacific, & Latin-America)

      http://europe-support.external.hp.com   (for Europe)

      Click on the Technical Knowledge Database, register as a user
      (remember to save the User ID assigned to you, and your password),
      and it will connect to a HP Search Technical Knowledge DB page.
      Near the bottom is a link to our Security Bulletin archive.
      Once in the archive there is another link to our current
      security patch matrix.  Updated daily, this matrix is categorized
      by platform/OS release, and by bulletin topic.

   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.
________________________________________________________________________
- -----End of Document ID:  HPSBUX9801-074--------------------------------------


2) dtappgather program in CDE

Document ID:  HPSBUX9801-075
Date Loaded:  980121
      Title:  Security Vulnerability in CDE on HP-UX

- -------------------------------------------------------------------------
         HEWLETT-PACKARD SECURITY BULLETIN: #00075, 21 January 1998
- -------------------------------------------------------------------------

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:  The dtappgather program can create vulnerabilities allowing
          unauthorized privileged access or denial of service.

PLATFORM: HP9000 Series 700/800s running CDE on:
          HP-UX 10.10, HP-UX 10.20,
          HP-UX 10.24 (VVOS),
          HP-UX 11.00

DAMAGE:   The vulnerability could result in allowing a user
          to gain unauthorized access to the system or to
          create a denial of service.

SOLUTION:  Apply one of:
           PHSS_13723  HP-UX 10.10
           PHSS_13724  HP-UX 10.20
           PHSS_13725  HP-UX 10.30
           PHSS_13772  HP-UX 10.24
           PHSS_13406  HP-UX 11.00

AVAILABILITY: The patches are available now.
____________________________________________________________________

I.
   A. Background
      The dtappgather program does not adequately check all
      information passed to it by users.  By exploiting these
      vulnerabilities, an attacker can gain either unauthorized
      privileged access or create a denial of service on the system.

   B. Fixing the problem
      This problem can be eliminated by applying one of the
      recommended patches.

   C. Recommended solution
      Apply the patch.

   D. Impact of the patch
      The patch eliminates the vulnerability.

   E. 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 at:

      http://us-support.external.hp.com
      (for US, Canada, Asia-Pacific, & Latin-America)

      http://europe-support.external.hp.com
      (for Europe)

     Click on the Technical Knowledge Database, register as a user
     (remember to save the User ID assigned to you, and your password),
     and it will connect to a HP Search Technical Knowledge DB page.
     Near the bottom is a hyperlink to our Security Bulletin archive.
     Once in the archive there is another link to our current
     security patch matrix. Updated daily, this matrix is categorized
     by platform/OS release, and by bulletin topic.

   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.
________________________________________________________________________
- -----End of Document ID:  HPSBUX9801-075--------------------------------------


3) land on HP-UX  (Updated on February 24, 1998)

Document ID:  HPSBUX9801-076
Date Loaded:  980224
      Title:  Security Vulnerability with land on HP-UX

- -------------------------------------------------------------------------
**REVISED 02** HEWLETT-PACKARD SECURITY BULLETIN: #00076, 21 January 1998
Last Revised:   23 February 1998
- -------------------------------------------------------------------------

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:  A TCP SYN packet with target host's address as both source and
          destination can cause system hangs.

PLATFORM: HP9000 Series 7/800 running HP-UX releases 9.X, 10.X, and 11.00.

DAMAGE:   Users on the network can cause system hangs.

SOLUTION: Apply patches listed below.

AVAILABILITY:  All patches are available now.
CHANGE SUMMARY: R1 Adds patches for HP-UX release 10.24 (VVOS)
                R2 Adds patches for HP-UX release 10.16 (CMW BLS)
- -------------------------------------------------------------------------
I.
   A. Background
      CERT Advisory CA-97.28 discusses the widely available "land" program,
      a denial of service tool that is effective against HP-UX systems.
      land sends carefully crafted TCP packets (the source and destination
      are identical).

**REVISED 02**
   B. Fixing the problem
      The problem can be fixed by applying the appropriate cumulative ARPA
      Transport patch mentioned below.

      HP-UX release 11.00 HP9000 Series 700/800     PHNE_14017
      HP-UX release 10.30 HP9000 Series 700/800     PHNE_13671
      HP-UX release 10.20 HP9000 Series 800         PHNE_13468
      HP-UX release 10.24 HP9000 Series 700         PHNE_13888
      HP-UX release 10.24 HP9000 Series 800         PHNE_13889
      HP-UX release 10.20 HP9000 Series 800         PHNE_13468
      HP-UX release 10.20 HP9000 Series 700         PHNE_13469
- ---->>HP-UX release 10.16 HP9000 Series 700         PHKL_14242
- ---->>HP-UX release 10.16 HP9000 Series 800         PHKL_14243
      HP-UX release 10.10 HP9000 Series 800         PHNE_13470
      HP-UX release 10.10 HP9000 Series 700         PHNE_13471
      HP-UX release 10.01 HP9000 Series 800         PHNE_13472
      HP-UX release 10.01 HP9000 Series 700         PHNE_13473
      HP-UX release 10.00 HP9000 Series 800         PHNE_13474
      HP-UX release 10.00 HP9000 Series 700         PHNE_13475
      HP-UX release  9.04 HP9000 Series 800         PHNE_13476
      HP-UX release  9.0[3,5,7] HP9000 Series 700   PHNE_13477
      HP-UX release  9.01 HP9000 Series 700         PHNE_13478
      HP-UX release  9.00 HP9000 Series 800         PHNE_13479

   C. Impact of the patch
      The patch changes the implementation of the ISO OSI stack such
      that the host now enforces the rule that inbound packets are never
      from itself - if packets claim otherwise, they are simply dropped.

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

      User your browser to get to the HP Electronic Support Center page
      at:
      http://us-support.external.hp.com
      (for US, Canada, Asia-Pacific, & Latin-America)

      http://europe-support.external.hp.com    (for Europe)


      Click on the Technical Knowledge Database, register as a user
      (remember to save the User ID assigned to you, and your password),
      and it will connect to a HP Search Technical Knowledge DB page.
      Near the bottom is a hyperlink to our Security Bulletin archive.
      Once in the archive there is another link to our current
      security patch matrix. Updated daily, this matrix is categorized
      by platform/OS release, and by bulletin topic.


   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.
________________________________________________________________________
- -----End of Document ID:  HPSBUX9801-076--------------------------------------


 [ End Hewlett-Packard Advisories ]

______________________________________________________________________________

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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   World Wide Web:      http://www.ciac.org/
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   Anonymous FTP:       ftp.ciac.org
                        (or ciac.llnl.gov -- they're the same machine)
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                        +1 (510) 423-3331 (28.8K baud)

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