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Home » Hacking News » CLA-2002:467-OpenSSH vulnerability

CLA-2002:467-OpenSSH vulnerability

by Nikola Strahija on March 12th, 2002 Joost Pol discovered[1] a off-by-one bug in OpenSSH's channel code that could be used by an attacker with a local account on the victim's machine to obtain root privileges on that machine. Another scenario for this vulnerability is that of a malicious ssh server exploiting a vulnerable ssh client connecting to it.


SOLUTION
It is recommended that all OpenSSH users upgrade their packages. The
sshd service will be automatically restarted after the upgrade if it
was already running at that time.


REFERENCES
1. http://www.pine.nl/advisories/pine-cert-20020301.txt
2. http://www.openbsd.org/advisories/ssh_channelalloc.txt (OpenSSH
advisory)


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/openssh-3.0.2p1-1U50_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-askpass-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-askpass-gnome-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-clients-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/openssh-server-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/openssh-3.0.2p1-1U51_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-3.0.2p1-1U51_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-askpass-3.0.2p1-1U51_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-askpass-gnome-3.0.2p1-1U51_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-clients-3.0.2p1-1U51_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/openssh-server-3.0.2p1-1U51_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/openssh-3.0.2p1-1U60_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-3.0.2p1-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-askpass-3.0.2p1-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-askpass-gnome-3.0.2p1-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-clients-3.0.2p1-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssh-server-3.0.2p1-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/openssh-3.0.2p1-1U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssh-3.0.2p1-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssh-askpass-3.0.2p1-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssh-askpass-gnome-3.0.2p1-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssh-clients-3.0.2p1-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssh-server-3.0.2p1-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/openssh-3.0.2p1-1U50_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-askpass-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-askpass-gnome-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-clients-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/openssh-server-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/openssh-3.0.2p1-1U50_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-askpass-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-askpass-gnome-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-clients-3.0.2p1-1U50_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/openssh-server-3.0.2p1-1U50_2cl.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

- -------------------------------------------------------------------------
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