-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

______________________________________________________________________________
		   Caldera Systems, Inc.  Security Advisory

Subject:		security problems in ypbind
Advisory number: 	CSSA-2000-039.0
Issue date: 		2000 October, 27
Cross reference:
______________________________________________________________________________


1. Problem Description

   There are several security problems in ypbind, the daemon used by
   NIS clients for binding to their NIS server(s).  First, there is a
   potential buffer overflow; it is not clear whether it is possible
   to exploit it at all. Second, there is a denial of service attack
   against ypbind that can make it run out of file descriptors.


2. Vulnerable Versions

   System                       Package
   -----------------------------------------------------------
   OpenLinux Desktop 2.3        All packages previous to
   				nis-2.0-12

   OpenLinux eServer 2.3        All packages previous to
   and OpenLinux eBuilder       nis-2.0-12

   OpenLinux eDesktop 2.4	All packages previous to
                                nis-2.0-12

3. Solution

   Workaround:

   none

4. OpenLinux Desktop 2.3

   4.1 Location of Fixed Packages

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

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

       The corresponding source code package can be found at:

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

   4.2 Verification

       475f1173b39d61be3bfefb616adc7d70  RPMS/nis-client-2.0-12.i386.rpm
       2b843e611fa135fec1d1ab3eec32eafe  RPMS/nis-server-2.0-12.i386.rpm
       c0fc63b43f7302da24119d8e7ac2bb7c  SRPMS/nis-2.0-12.src.rpm  

   4.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

	  rpm -Fhv nis-*.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:

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

       The corresponding source code package can be found at:

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

   5.2 Verification

       dda1d3f8465c5a1e39f7274bd413c4e9  RPMS/nis-client-2.0-12.i386.rpm
       2872d08157734973e37237ba10d7f87e  RPMS/nis-server-2.0-12.i386.rpm
       c0fc63b43f7302da24119d8e7ac2bb7c  SRPMS/nis-2.0-12.src.rpm  

   5.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

	  rpm -Fhv nis-*.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:

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

       The corresponding source code package can be found at:

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

   6.2 Verification

       41a67ed3b1508ecb959b7d72a42a7e7d  RPMS/nis-client-2.0-12.i386.rpm
       563902177d6abe1f446e264cbf127062  RPMS/nis-server-2.0-12.i386.rpm
       c0fc63b43f7302da24119d8e7ac2bb7c  SRPMS/nis-2.0-12.src.rpm     

   6.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

	  rpm -Fhv nis-*.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 8117.

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.

______________________________________________________________________________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.1 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE5+WPt18sy83A/qfwRAovWAKCav9BVYHhUW8ETqlU0vjMYxiJ6wwCfSdhU
0rePyg1uak4C0HOTnXLXGC0=
=rdWR
-----END PGP SIGNATURE-----