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______________________________________________________________________________
                   Caldera Systems, Inc. Security Advisory

Subject: remote root exploit in ntpd
Advisory number: CSSA-2001-013.0
Issue date: 2001 April, 6
Cross reference:
______________________________________________________________________________

1. Problem Description

   The ntp time synchronisation demon has a buffer overflow in its
   control request parsing which allows any remote attacker to gain
   root access, if the demon is running.

   Caldera Systems is shipping this demon disabled by default, but
   we urge our customers to either deinstall or upgrade the package.

2. Vulnerable Versions

   System Package
   -----------------------------------------------------------
   OpenLinux 2.3 All packages previous to
                                   xntp-3.5.93e-5

   OpenLinux eServer 2.3.1 All packages previous to
   and OpenLinux eBuilder xntp-3.5.93e-5

   OpenLinux eDesktop 2.4 All packages previous to
                                   xntp-4.0.97-2

3. Solution

   Workaround

   Stop the demon and deinstall the xntp package by using:
        /etc/rc.d/init.d/ntp stop
        rpm -e xntp

   The proper solution is to upgrade to the latest packages.

4. OpenLinux 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

       19e51b89951b435061450398e764b753 RPMS/xntp-3.5.93e-5.i386.rpm
       08a990b5034679c0a37ebbe20e162d05 SRPMS/xntp-3.5.93e-5.src.rpm

   4.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

          rpm -Fhv xntp-*.i386.rpm

5. OpenLinux eServer 2.3.1 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

       df892fae73626a11107552d7d1a68e6e RPMS/xntp-3.5.93e-5.i386.rpm
       663eb55d629cdcc0212583e92be15d11 SRPMS/xntp-3.5.93e-5.src.rpm

   5.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

          rpm -Fvh xntp-*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

       fe7cffdf379ee9b69890f9fa9ff0f320 RPMS/xntp-4.0.97-2.i386.rpm
       ff34841b2f01a252e6e31cb91ffcada5 SRPMS/xntp-4.0.97-2.src.rpm

   6.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

       rpm -Fvh xntp-*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 9744.

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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