[CLA-2001:442] Conectiva Linux Security Announcement - wu-ftpd
Date: Thu, 29 Nov 2001 12:20:47 -0200
From: [email protected]
To: [email protected], [email protected],
Subject: [CLA-2001:442] Conectiva Linux 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 : 2001-11-29 12:20:00
ID : CLA-2001:442
RELEVANT
RELEASES : 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0
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DESCRIPTION
"wu-ftpd" is one of the ftp servers available in Conectiva Linux and
several other linux distributions.
CORE Security Technologies[1] reported[2] a vulnerability[3] in the
wu-ftpd ftp server that can be exploited remotely. The problem is in
the internal glob function used by wu-ftpd which allows an attacker
to corrupt memory space and execute arbitrary code remotely. There is
no need for an user account on the ftp server, this problem can be
abused by anonymous users as well.
This vulnerability was first reported[4] by Matt Power but was deemed
not exploitable at that time.
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://www.core-sdi.com
2. http://www.securityfocus.com/archive/1/242964
3. http://www.securityfocus.com/bid/3581
4. http://www.securityfocus.com/archive/82/180823
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/wu-ftpd-2.6.1-6U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/wu-ftpd-2.6.1-6U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/wu-ftpd-2.6.1-6U51_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/wu-ftpd-2.6.1-6U51_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/wu-ftpd-2.6.1-6U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/wu-ftpd-2.6.1-6U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/wu-ftpd-2.6.1-6U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/wu-ftpd-2.6.1-6U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/wu-ftpd-2.6.1-6U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/wu-ftpd-2.6.1-6U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/wu-ftpd-2.6.1-6U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/wu-ftpd-2.6.1-6U50_1cl.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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