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[CLA-2003:715] Conectiva Security Announcement - wu-ftpd
From: Conectiva Updates <secure () conectiva com br>
Date: Fri, 1 Aug 2003 13:13:15 -0300

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : wu-ftpd
SUMMARY   : Remote vulnerability in the wu-ftpd server
DATE      : 2003-08-01 12:15:00
ID        : CLA-2003:715
RELEVANT
RELEASES  : 7.0, 8, 9

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DESCRIPTION
 "wu-ftpd" is one of the ftp servers available in Conectiva Linux and
 several other linux distributions.
 
 Janusz Niewiadomski and Wojciech Purczynski of iSEC Security Research
 have found[1] a off-by-one buffer overflow vulnerability in the
 fb_realpath() function, which handles filename paths in wu-ftpd. The
 vulnerability can be exploited by a remote attacker who can log in to
 the vulnerable server (with any account, including an anonymous one
 if available) to execute arbitrary code with the privileges of the
 root user.
 
 The Common Vulnerabilities and Exposures project (cve.mitre.org) has
 assigned the name CAN-2003-0466 to this issue[2].


SOLUTION
 All administrators who deploy wu-ftpd should upgrade immediately. If
 an upgrade is not possible, then the service should be shut down, or
 another ftp server should be used.
 
 There is no need to restart the service after the upgrade because
 wu-ftpd is started from inetd. The administrator might want to,
 however, shut down all current connections which would still be using
 the vulnerable copy to avoid a possible abuse by currently connected
 users.
 
 
 REFERENCES:
 1.http://isec.pl/vulnerabilities/isec-0011-wu-ftpd.txt
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0466


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/wu-ftpd-2.6.1-6U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/wu-ftpd-2.6.1-6U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/wu-ftpd-2.6.1-8U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/wu-ftpd-2.6.1-8U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/wu-ftpd-2.6.2-13985U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/wu-ftpd-2.6.2-13985U90_1cl.src.rpm


ADDITIONAL INSTRUCTIONS
 The apt tool can be used to perform RPM packages upgrades:

 - 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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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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