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             AUSCERT External Security Bulletin Redistribution

            ESB-2002.257 -- Compaq Security Bulletin (SSRTM541)
  Tru64 UNIX CDE, NFS and NIS related Potential Security Vulnerabilities
                                4 June 2002

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

Product:                CDE
                        NFS
                        NIS
Vendor:                 Compaq
Operating System:       Tru64 UNIX V4.0F
                        Tru64 UNIX V4.0G
                        Tru64 UNIX V5.0A
                        Tru64 UNIX V5.1
                        Tru64 UNIX V5.1A
Impact:                 Denial of Service
                        Execute Arbitrary Code/Commands
                        Increased Privileges
Access Required:        Remote

Ref:                    ESB-2002.181

Comments: Compaq PGP signature is bad for this advisory, but content
          correlates with:

      http://ftp.support.compaq.com/patches/.new/html/SSRT-541.shtml

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UPDATE: (SSRTM541)Tru64 UNIX CDE, NFS and NIS related Potential
         Security Vulnerabilities

Posted at http://ftp.support.compaq.com/patches/.new/security.shtml

NOTICE: There are no restrictions for distribution of this Bulletin
provided that it remains complete and intact.


RELEASE DATE: 17 April, 2002 (SSRT-541)
LAST UPDATED: 22 May, 2002   (SSRTM541) New Patches

SEVERITY:  1

SOURCE:  Compaq Computer Corporation
         Compaq Services
         Software Security Response Team

REFERENCE:  [security bulletin posted 17 April, 2002]
            (SSRT-541) Tru64 UNIX CDE, NFS and NIS related Potential
            Security Vulnerabilities

PROBLEM SUMMARY:
A number of potential security vulnerabilities in Tru64 UNIX V4.0F,
V4.0G, V5.0A, V5.1 and V5.1A, have recently been reported for CDE,
libc, and NFS where, under certain circumstances, system integrity
may be compromised by a malicious user.

 o CDE (severity high)
   o dtaction potential buffer overflow (SSRT0752U)
   o ttsession potential buffer overflow (SSRT0753U)
   o dtprintinfo potential buffer overflow (SSRT0757U, SSRT0788U)
   o dtspcd potential buffer overflow. (SSRT0782U)
     NOTE: cross-reference : (CVE CVE-2001-0803,CERT CA-2001-31,
     CA-2002-01)
     Compaq has not been able to reproduce the problem identified
     in the CERT advisory for any Compaq OS. However with the
     information available, we are including a code change for
     dtspcd that will further reduce any potential buffer overflow
     vulnerability.
       o Buffer overflow attacks are commonly used to attempt to
         subvert the function of a privileged program and
         possibly execute commands at the elevated privileges if
         the program file has the setuid privilege.

 o Environment Variable LANG and LOCPATH (severity high)
   o libc (SSRT0771U)
       A libc environment variable corruption with LANG and
       LOCPATH , may cause a potential buffer overflow

 o NIS Network Information Service (severity moderate)
    o ypbind may core during nmap portscan (SSRT0781U)
       o Core: A file that is a copy of the contents of a
          processes memory, that can be produced when that
          process is aborted by certain kinds of internal error.

 o NFS Network File System (severity moderate)
    o NFS Potential packet flood denial of service (DoS) (SSRT1-26)
       NOTE: Applies to V4.0g PK3 (BL17) & V5.0a PK3 (BL17) only
       A remote user with malicious intent may cause a potential
       denial of service (DoS) with portmap server.

       o Network DoS attacks make computer systems inaccessible
         by flooding a service, server or network with useless
         traffic.

VERSIONS IMPACTED:

 TRU64 UNIX Versions Impacted

 V5.1A PK1 (BL1)
 V5.1  PK4 (BL18)
 V5.0A PK3 (BL17)
 V4.0F PK7 (BL18)
 V4.0G PK3 (BL17)


RESOLUTION:

The potential vulnerabilities noted below have been corrected and
newly released patches are now available for TRU64 UNIX.

Compaq strongly recommends that systems be updated to at least the
prerequisite version of TRU64 UNIX and PK release, then install the
previously released security patches identified in the security
bulletin
http://ftp.support.compaq.com/patches/.new/html/SSRT0742U-59U.shtml
prior to installing the following ERP (Early Release Patch).

 UPDATE: 5/22/2002  Updated ERPs are now available for all supported
 versions of Tru64 UNIX and will be available in the next aggregate
 patch kits for each supported product version.  Until these Tru64
 UNIX fixes are available in mainstream patch kits, Compaq recommends
 use of the following ERP kits:

  NOTE:  Please review the README file(s) for each patch prior to
         installation.

  The Early Release Patch kits use dupatch to install and will not
  install over any installed Customer-Specific-Patches (CSPs) which
  have file intersections with the ERPs.  Contact your normal support
  channel for assistance if the installation of the ERPs are blocked
  by any of your installed CSPs.

  Tru64 UNIX 5.1A
   PREREQUISITE:        Tru64 UNIX 5.1A with PK1 (BL1) installed
   ERP Kit Name:        T64V51AB1-C0011202-14166-ES-20020429.tar
   Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1a/
  SUPERCEDES KIT: T64V51AB1-C0011201-13438-ES-20020228


  Tru64 UNIX 5.1
   PREREQUISITE:        Tru64 UNIX 5.1 with PK4 (BL18) installed
   ERP Kit Name:        T64V51B18-C0102003-14238-ES-20020507.tar
   Kit Location: http://ftp1.support.compaq.com/public/unix/v5.1/
  SUPERCEDES KIT:    T64V51B18-C0102001-13428-ES-20020228


  Tru64 UNIX 5.0A
   PREREQUISITE:        Tru64 UNIX 5.0A with PK3 (BL17) installed
   ERP Kit Name:        T64V50AB17-C0018303-14330-ES-20020516.tar
   Kit Location: http://ftp1.support.compaq.com/public/unix/v5.0a/
  SUPERCEDES KIT:    T64V50AB17-C0018301-13396-ES-20020226


  Tru64 UNIX 4.0G
   PREREQUISITE:        Tru64 UNIX 4.0G with PK3 (BL17) installed
   ERP Kit Name:        T64V40GB17-C0010303-14314-ES-20020515.tar
   Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0g/
  SUPERCEDES KIT:    T64V40GB17-C0010301-13400-ES-20020226


  Tru64 UNIX 4.0F
   PREREQUISITE:        Tru64 UNIX 4.0F with PK7 (BL18) installed
   ERP Kit Name:        DUV40FB18-C0067302-14158-ES-20020429.tar
   Kit Location: http://ftp1.support.compaq.com/public/unix/v4.0f/
  SUPERCEDES KIT:    DUV40FB18-C0067301-13427-ES-20020228


Additional Notes:

The fixes contained in the Early Release Patch (ERP) kits listed
above will be available in the following mainstream patch kit(s):

 Tru64 UNIX 5.1A  PK2
 Tru64 UNIX 5.1   PK5
 Tru64 UNIX 5.0A  PK4
 Tru64 UNIX 4.0G  PK5
 Tru64 UNIX 4.0F  PK8

MD5 and SHA1 checksums are available in the public patch notice for
the ERP kits. You may find information on how to verify MD5 and SHA1
checksums at http://www.support.compaq.com/patches/whats-new.shtml

After completing the update, Compaq strongly recommends that you
perform an immediate backup of your system disk so that any
subsequent restore operations begin with updated software. Otherwise,
you must reapply the update after any future restore operation. Any
future upgrades or patch release installations to your system will
require the re-application of the appropriate ERP (identified above).

SUPPORT: For further information, contact Compaq Global Services.


SUBSCRIBE:


To subscribe to automatically receive future Security
Advisories from the Compaq's Software Security Response Team via
electronic mail:
http://www.support.compaq.com/patches/mailing-list.shtml

REPORT:

To report a potential security vulnerability with any Compaq
supported product, send email mailto:security-ssrt@compaq.com
or mailto:sec-alert@compaq.com

Compaq appreciates your cooperation and patience. As always,
Compaq urges you to periodically review your system management
and security procedures. Compaq will continue to review and
enhance the security features of its products and work with
our customers to maintain and improve the security and integrity
of their systems.

"Compaq is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected Compaq products the
important security information contained in this Bulletin.
Compaq recommends that all users determine the applicability of
this information to their individual situations and take appropriate
action.  Compaq does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently,
Compaq will not be responsible for any damages resulting from
user's use or disregard of the information provided in this
Bulletin."

Copyright 2002 Compaq Information Technologies Group, L.P.
Compaq shall not be liable for technical or editorial errors
or omissions contained herein. The information in this document
is subject to change without notice. Compaq and the names of
Compaq products referenced herein are, either, trademarks
and/or service marks or registered trademarks and/or service
marks of Compaq Information Technologies Group, L.P. Other product
and company names mentioned herein may be trademarks and/or service
marks of their respective owners.

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