-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : linuxconf SUMMARY : Open relay in mailconf module DATE : 2002-11-06 17:05:00 ID : CLA-2002:544 RELEVANT RELEASES : 6.0, 7.0, 8 - ------------------------------------------------------------------------- DESCRIPTION Linuxconf is an administration system which is divided in several modules. The mailconf module is responsible for the sendmail configuration. There is a problem[1] in the sendmail.cf file generated by the mailconf module that allows sendmail to be used as an open relay. By exploiting this vulnerability, a malicious user could send SPAM through the sendmail server without being in its served network. In order to do that, the recipient address of the messages must be in the format "user%domain@". Please note that the default sendmail.cf file distributed with our sendmail package is not vulnerable to this open relay problem. Only users who have generated the sendmail.cf file using linuxconf are. For information about mail relay and why it should be configurated properly, please consult the "Open Relay Database FAQ" [2]. SOLUTION All users of the linuxconf-mailconf module should upgrade. IMPORTANT: after the update, it is necessary to regenerate the sendmail.cf and the sendmail service must be restarted. In order to do that, use the option "Generate /etc/mail/sendmail.cf" from mailconf and run the command "service sendmail restart" (as root), if it was already running. REFERENCES: 1.http://distro.conectiva.com.br/bugzilla/show_bug.cgi?id=6597 2.http://www.ordb.org/faq/ DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/RPMS/linuxconf-mailconf-1.24r2-6U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/linuxconf-1.24r2-6U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/linuxconf-mailconf-1.25r3-27U70_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/linuxconf-1.25r3-27U70_2cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/linuxconf-mailconf-1.25r3-39U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/linuxconf-1.25r3-39U80_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-subscribe@papaleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9yWgC42jd0JmAcZARAkUGAJoDrtSjOgHVJDXSJnl4aIh8CLb/OgCfUCEy Bzm7EhdtORtLh+5bvk9qT/0= =cFtQ -----END PGP SIGNATURE-----
