Date: Fri, 1 Aug 2003 13:13:15 -0300
From: Conectiva Updates <[email protected]>
To: [email protected], [email protected],
Subject: [CLA-2003:715] Conectiva Security Announcement - wu-ftpd
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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.rpmftp://atualizacoes.conectiva.com.br/7.0/SRPMS/wu-ftpd-2.6.1-6U70_3cl.src.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/wu-ftpd-2.6.1-8U80_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/SRPMS/wu-ftpd-2.6.1-8U80_1cl.src.rpmftp://atualizacoes.conectiva.com.br/9/RPMS/wu-ftpd-2.6.2-13985U90_1cl.i386.rpmftp://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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subscribe: [email protected]
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