-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : sudo SUMMARY : Local vulnerability allows an attacker to obtain root privileges DATE : 2002-01-15 17:21:00 ID : CLA-2002:451 RELEVANT RELEASES : 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0 - ------------------------------------------------------------------------- DESCRIPTION "sudo" is an utility designed to be used by administrators who wish to delegate administrative privileges to regular users for very specific commands, and without giving away the root password. Sebastian Krahmer from SuSe found a vulnerability in the sudo package which could be used by a local attacker to obtain root privileges. Versions prior to and including 1.6.3p7 remove a few potentially dangerous environment variables prior to executing a command as root, but other variables could be abused and used to obtain root privileges. One such scenario is when an unauthorized users attempts to execute sudo. This will cause sudo to execute a mailer to send a notice to the administrator, which is executed as root and with some environment variables specified by the attacker. This has been succesfully exploited with the postfix mailer in a default configuration, but other mailers and programs could be affected too. The author has released version 1.6.4 to address this problem. This version runs the mail program with a clean environment. SOLUTION It is recommended that all sudo users apply the update. REFERENCES 1. http://www.securityfocus.com/archive/1/250168 2. http://www.sudo.ws/pipermail/sudo-announce/2002-January/000015.html DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/sudo-1.6.4p1-1U50_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/sudo-1.6.4p1-1U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/sudo-doc-1.6.4p1-1U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/sudo-1.6.4p1-1U51_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/sudo-1.6.4p1-1U51_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/sudo-doc-1.6.4p1-1U51_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sudo-1.6.4p1-1U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sudo-1.6.4p1-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sudo-doc-1.6.4p1-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sudo-1.6.4p1-1U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sudo-1.6.4p1-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sudo-doc-1.6.4p1-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/sudo-1.6.4p1-1U50_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/sudo-1.6.4p1-1U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/sudo-doc-1.6.4p1-1U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/sudo-1.6.4p1-1U50_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/sudo-1.6.4p1-1U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/sudo-doc-1.6.4p1-1U50_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 - ------------------------------------------------------------------------- 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 iD8DBQE8RIfr42jd0JmAcZARAkYtAKDs9hLi4Q5kNC2lW1ZGRGI92cacngCfRvQn sUvdktGw9Wy1u61oBTeMfvs= =b0H3 -----END PGP SIGNATURE-----
