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Conectiva Linux Security Announcement - xntp3

Apr 10, 2001, 11:57 (1 Talkback[s])
Date:         Mon, 9 Apr 2001 15:22:55 -0300
From: secure@CONECTIVA.COM.BR
Subject:      [CLA-2001:392] Conectiva Linux Security Announcement - xntp3

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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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

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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


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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
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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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