-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : xchat SUMMARY : /dns command vulnerability DATE : 2002-09-23 16:20:00 ID : CLA-2002:526 RELEVANT RELEASES : 6.0, 7.0, 8 - ------------------------------------------------------------------------- DESCRIPTION XChat is a popular graphical IRC client available in most linux distributions. XChat prior to version 1.8.9 has a vulnerability[1] that may allow a remote attacker to execute arbitrary commands in the IRC client context. The vulnerability resides in the way xchat handles the IRC server response for the /dns command. It passes the response directly to a shell without filtering it. An attacker with administration privileges in the IRC server can insert escaped commands in such a response, which will be executed by the client's shell. Please note that in order to have this vulnerability exploited, the xchat user must be connected to an IRC server where the attacker has administration privileges and must also run the /dns command. SOLUTION All xchat users should upgrade. REFERENCES: 1.http://marc.theaimsgroup.com/?l=bugtraq&m=101725430425490&w=2 2.http://distro.conectiva.com.br/bugzilla/show_bug.cgi?id=6596 DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/RPMS/xchat-1.8.10-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/xchat-1.8.10-1U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/xchat-1.8.10-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/xchat-gtk-1.8.10-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/xchat-1.8.10-1U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/xchat-1.8.10-1U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/xchat-gtk-1.8.10-1U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/xchat-1.8.10-1U80_1cl.src.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 - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribeat_private unsubscribe: conectiva-updates-unsubscribeat_private -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9j2m842jd0JmAcZARApY0AJ0RuMdvc4VKoob30K+T3e67g9NaQACdF0pa 7v3stBJlIbqUrxCFaSIRFso= =B7fz -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Mon Sep 23 2002 - 14:29:35 PDT