From secure@conectiva.com.br Mon Mar 4 14:38:28 2002 From: secure@conectiva.com.br To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com Date: Mon, 4 Mar 2002 13:54:03 -0300 Subject: [CLA-2002:465] Conectiva Linux Security Announcement - apache -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : apache SUMMARY : Buffer overflow in the mod_ssl module used by apache DATE : 2002-03-04 13:53:00 ID : CLA-2002:465 RELEVANT RELEASES : 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0 - ------------------------------------------------------------------------- DESCRIPTION "mod_ssl"[1] is an Apache module which enables the use of encrypted connections ("https://") to the web server and other crypto-related functions. Ed Moyle announced[2] a buffer overflow vulnerability[3] in the mod_ssl module. This module is not part of the apache distribution, but is bundled and enabled by default in the Conectiva Linux Apache packages. A remote attacker could exploit this vulnerability and execute arbitrary commands on the server running apache with this module enabled. A probable way to explore this is via client certificate authentication, where the attacker would use a specially crafted certificate to overflow this buffer. Since this vulnerability happens only after the client certificate has been checked, this means that it would have to be signed by a CA accepted by the apache server. SOLUTION It is recommended that all apache users upgrade their packages. SSL support can also be disabled if the update can not be installed immediately. To disable it, edit /etc/rc.d/init.d/httpd and remove the "-DSSL" parameter. IMPORTANT: the apache server has to be restarted after upgrading the packages. To do this, please execute, as root: service httpd stop (wait a few seconds and check with "ps ax|grep httpd" if there are any httpd processes running. On a busy webserver this could take a little longer.) service httpd start REFERENCES 1. http://www.modssl.org 2. http://online.securityfocus.com/archive/1/258646 3. http://online.securityfocus.com/bid/4189 DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/apache-1.3.22-1U50_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/apache-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/apache-devel-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/apache-doc-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/apache-1.3.22-1U51_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/apache-1.3.22-1U51_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/apache-doc-1.3.22-1U51_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/apache-devel-1.3.22-1U51_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/apache-1.3.22-1U60_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/apache-1.3.22-1U60_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/apache-devel-1.3.22-1U60_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/apache-doc-1.3.22-1U60_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/apache-1.3.22-1U70_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/apache-1.3.22-1U70_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/apache-devel-1.3.22-1U70_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/apache-doc-1.3.22-1U70_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/apache-1.3.22-1U50_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/apache-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/apache-devel-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/apache-doc-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/apache-1.3.22-1U50_3cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/apache-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/apache-devel-1.3.22-1U50_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/apache-doc-1.3.22-1U50_3cl.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 iD8DBQE8g6ap42jd0JmAcZARAiS8AJ9tRb+5UjqNobWWxGpHrZ6GtAxNuwCePjHv dXrZ3p8QGFpodbgny11H4/4= =vmlA -----END PGP SIGNATURE-----