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______________________________________________________________________________

   Caldera Systems, Inc.  Security Advisory



Subject: irc-bx buffer overflow

Advisory number: CSSA-2000-044.0

Issue date: 2000 December, 11

Cross reference:

______________________________________________________________________________





1. Problem Description



   There is a bug in the BitchX IRC client shipped with OpenLinux

   which allows an attacker in control of his reverse DNS mapping

   to crash or even remotely access a BitchX session.



2. Vulnerable Versions



   System                       Package

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

   OpenLinux Desktop 2.3        All packages previous to

   irc-BX-1.0c17-2



   OpenLinux eServer 2.3        All packages previous to

   and OpenLinux eBuilder       irc-BX-1.0c17-2



   OpenLinux eDesktop 2.4 All packages previous to

                                irc-BX-1.0c17-2



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



       181880ff4a1d84ea279b2cb2488df272  RPMS/irc-BX-1.0c17-2.i386.rpm

       811f13b66a7ecf4213f3b45a151cdb46  SRPMS/irc-BX-1.0c17-2.src.rpm



   4.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Fhv irc-BX-1.0c17-2.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



       5af28569fea636b70d849b18197884d0  RPMS/irc-BX-1.0c17-2.i386.rpm

       811f13b66a7ecf4213f3b45a151cdb46  SRPMS/irc-BX-1.0c17-2.src.rpm



   5.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Uhv irc-BX-1.0c17-2.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



       f68ff737cbee8e7c1f4015c9df089abb  RPMS/irc-BX-1.0c17-2.i386.rpm

       811f13b66a7ecf4213f3b45a151cdb46  SRPMS/irc-BX-1.0c17-2.src.rpm



   6.3 Installing Fixed Packages



       Upgrade the affected packages with the following commands:



  rpm -Uhv irc-BX-1.0c17-2.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 8515.



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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