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Date: Mon, 9 Apr 2001 15:22:55 -0300 To: conectiva-updates@papaleguas.conectiva.com.br, Subject: [CLA-2001:392] Conectiva Linux Security Announcement - xntp3 From: secure@conectiva.com.br -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : xntp3 SUMMARY : Remote buffer overflow DATE : 2001-04-09 15:07:00 ID : CLA-2001:392 RELEVANT RELEASES : 4.0, 4.0es, 4.1, 4.2, 5.0, prg graficos, ecommerce, 5.1, 6.0 - ------------------------------------------------------------------------- DESCRIPTION "xntp3" is a package used to syncronize clocks between computers on a network. Przemyslaw Frasunek published an exploit that demonstrates a buffer overflow vulnerability in that package. This vulnerability can be exploited remotely and is aggravated by the fact that the xntpd daemon runs as root. SOLUTION All users of the xntp3 package should upgrade immediately. The update for Conectiva Linux 6.0 incorporates a patch from Chris Wing for CAEN-Linux that allows the xntpd daemon to run as a regular user and still be able to set the system clock. Conectiva Linux 6.0 users using apt-get to update their systems should execute the following command: apt-get install xntp3 instead of the usual "apt-get upgrade". This is necessary because this update, besides fixing the security problem, requires a new package, libcap. This library (which in turn uses capabilities) is used by xntpd so that it can set the system clock without being root. DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/4.0/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.0/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.0es/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.0es/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.1/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.1/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.2/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.2/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/libcap-1.10-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libcap-1.10-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libcap-devel-1.10-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/xntp3-5.93-21cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/xntp3-5.93-21cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/xntp3-5.93-21cl.i386.rpm ADDITIONAL INSTRUCTIONS Users of Conectiva Linux version 6.0 or higher may use apt to perform upgrades of RPM packages: - add the following line to /etc/apt/sources.list if it is not there yet (you may also use linuxconf to do this): rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates (replace 6.0 with the correct version number if you are not running CL6.0) - run: apt-get update - after that, execute: apt-get upgrade Detailed instructions reagarding the use of apt and upgrade examples can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en - ------------------------------------------------------------------------- All packages are signed with Conectiva's GPG key. The key and instructions on how to import it can be found at http://distro.conectiva.com.br/seguranca/chave/?idioma=en Instructions on how to check the signatures of the RPM packages can be found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en - ------------------------------------------------------------------------- All our advisories and generic update instructions can be viewed at http://distro.conectiva.com.br/atualizacoes/?idioma=en - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE60f3+42jd0JmAcZARAs+vAJ94fukC34SmrVRDjztOujQIM+aoYwCffps1 oZQ9YdHpfKLbYYz5kz0jObk= =n0eO -----END PGP SIGNATURE-----