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[CLA-2003:748] Conectiva Security Announcement - wu-ftpd
From: Conectiva Updates <secure () conectiva com br>
Date: Mon, 22 Sep 2003 16:23:35 -0300

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : wu-ftpd
SUMMARY   : Command execution remote vulnerability
DATE      : 2003-09-22 16:22:00
ID        : CLA-2003:748
RELEVANT
RELEASES  : 7.0, 8, 9

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DESCRIPTION
 "wu-ftpd" is one of the ftp servers available in Conectiva Linux and
 other linux distributions.
 
 This update fixes a vulnerability[1] in the way wu-ftpd uses the
 "conversion" feature, which is used mostly to (un)compress files. The
 scenario where this vulnerability can be exploited varies depending
 on the server configuration, but in the worst case, an attacker with
 access (valid account or anonymous login) to the FTP server can
 execute arbitrary commands by using specially crafted file names.
 
 The Common Vulnerabilities and Exposures project (cve.mitre.org) has
 assigned the name CVE-1999-0997 to this issue[2].
 
 Additionally, the anonftp package of Conectiva Linux 9 is being
 updated to fix a problem[3] which is preventing the use of some
 commands because of missing libraries in the chroot environment used
 to serve anonymous logins.


SOLUTION
 All wu-ftpd users should upgrade their packages.
 
 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://www.securityfocus.com/bid/2240
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0997
 3.http://bugzilla.conectiva.com.br/show_bug.cgi?id=8992


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/wu-ftpd-2.6.1-6U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/wu-ftpd-2.6.1-6U70_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/wu-ftpd-2.6.1-8U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/wu-ftpd-2.6.1-8U80_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/wu-ftpd-2.6.2-13985U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/anonftp-3.0-22686U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/wu-ftpd-2.6.2-13985U90_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/anonftp-3.0-22686U90_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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