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______________________________________________________________________________

   Caldera Systems, Inc.  Security Advisory



Subject: bash creates insecure temp files

Advisory number: CSSA-2000-042.0

Issue date: 2000 November, 24

Cross reference:

______________________________________________________________________________





1. Problem Description



   Bash creates temp files for here scripts insecurely.

   This can be exploited via a symlink attack to create

   or write over arbitrary files on the system if the shell

   is run by root.



2. Vulnerable Versions



   System                       Package

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

   OpenLinux Desktop 2.3        All packages previous to

   bash-1.14.7-14



   OpenLinux eServer 2.3        All packages previous to

   and OpenLinux eBuilder       bash-1.14.7-14



   OpenLinux eDesktop 2.4 All packages previous to

                                bash-1.14.7-14



3. Solution



   Workaround:



     none



   The proper solution is to upgrade to the fixed packages



4. OpenLinux Desktop 2.3



   4.1 Location of Fixed Packages



       The upgrade packages can be found on Caldera's FTP site at:



       http://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/RPMS/



       The corresponding source code package can be found at:



       http://ftp.calderasystems.com/pub/updates/OpenLinux/2.3/current/SRPMS



   4.2 Verification



       310d7b5b15517054697264fa449b732e  RPMS/bash-1.14.7-14.i386.rpm

       43dcac265abb95860569cd462cb6b870  SRPMS/bash-1.14.7-14.src.rpm



   4.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Fhv bash-*.i386.rpm



5. OpenLinux eServer 2.3 and OpenLinux eBuilder for ECential 3.0



   5.1 Location of Fixed Packages



       The upgrade packages can be found on Caldera's FTP site at:



       http://ftp.calderasystems.com/pub/updates/eServer/2.3/current/RPMS/



       The corresponding source code package can be found at:



       http://ftp.calderasystems.com/pub/updates/eServer/2.3/current/SRPMS



   5.2 Verification



       ca722e9a6b4d69af48044a35f08f2c86  RPMS/bash-1.14.7-14.i386.rpm

       43dcac265abb95860569cd462cb6b870  SRPMS/bash-1.14.7-14.src.rpm



   5.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Fhv bash-*.i386.rpm



6. OpenLinux eDesktop 2.4



   6.1 Location of Fixed Packages



       The upgrade packages can be found on Caldera's FTP site at:



       http://ftp.calderasystems.com/pub/updates/eDesktop/2.4/current/RPMS/



       The corresponding source code package can be found at:



       http://ftp.calderasystems.com/pub/updates/eDesktop/2.4/current/SRPMS



   6.2 Verification



       2c8d2bef0b7a4eefde60f62617ea5932  RPMS/bash-1.14.7-14.i386.rpm

       43dcac265abb95860569cd462cb6b870  SRPMS/bash-1.14.7-14.src.rpm



   6.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Fhv bash-*.i386.rpm



7. References



   This and other Caldera security resources are located at:



   http://www.calderasystems.com/support/security/index.html



   This security fix closes Caldera's internal Problem Report 8322.



8. Disclaimer



   Caldera Systems, Inc. is not responsible for the misuse of any of the

   information we provide on this website and/or through our security

   advisories. Our advisories are a service to our customers intended to

   promote secure installation and use of Caldera OpenLinux.



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