Date: Wed, 28 Mar 2001 12:40:10 -0300
From: secure@CONECTIVA.COM.BR
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [CLA-2001:391] Conectiva Linux Security Announcement –
openssh
CONECTIVA LINUX SECURITY ANNOUNCEMENT
PACKAGE : openssh
SUMMARY : Passive traffic analysis
DATE : 2001-03-28 12:39:00
ID : CLA-2001:391
RELEVANT
RELEASES : 5.0, prg graficos, ecommerce, 5.1, 6.0
DESCRIPTION
Solar Designer demonstrated[1] that it is possible to do a passive
analysis on an ssh encrypted connection and obtain important
information about that connection. In particular, it is possible to
obtain the number of characters of a password (which can be the
login password itself or even passwords entered during interactive
commands such as “su”), type of authentication that was used
(password or publickey) and the numbers of characters typed in a
shell. This analysis can, for example, give valuable information
that will reduce the universe of passwords that have to be tried in
a brute-force attack.
SOLUTION
It is recommended that all openssh users upgrade their
packages.
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/openssh-2.5.2p2-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-clients-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-askpass-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-askpass-gnome-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-server-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/openssh-2.5.2p2-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-clients-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-askpass-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-askpass-gnome-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-server-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/openssh-2.5.2p2-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-clients-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-askpass-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-askpass-gnome-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-server-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/openssh-2.5.2p2-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-askpass-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-clients-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-server-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/openssh-2.5.2p2-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-askpass-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-clients-2.5.2p2-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-server-2.5.2p2-1cl.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
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
All our advisories and generic update instructions can be viewed
at http://distro.conectiva.com.br/atualizacoes/?idioma=en