- -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : apache SUMMARY : Denial of service vulnerability DATE : 2003-04-30 14:48:00 ID : CLA-2003:632 RELEVANT RELEASES : 9 - ------------------------------------------------------------------------- DESCRIPTION Apache[1] is the most popular webserver in use today. This update fixes two security vulnerabilities: 1. Denial of service (CAN-2003-0132)[3] David Endler from iDefense reported[2] a denial of service condition that affects the apache 2.0 branch which affects all unpatched servers up to and including version 2.0.44. There is a memory leak in these apache versions which can be remotely triggered by sending large chunks of consecutive linefeed characters. Each linefeed will cause the server to allocate 80 bytes of memory. A remote attacker can keep sending these simple requests until the server's memory is exhausted. 2. File descriptor leak[5] Christian Kratzer and Bjoern A. Zeeb identified several file descriptor leaks to child processes, such as CGI scripts, which could consitute a security threat on servers that run untrusted CGI scripts. The Apache HTTP Server Project released[4] Apache version 2.0.45 to address these issues, and this is the version provided via this update. SOLUTION It is recommended that all Apache users upgrade their packages. IMPORTANT: it is necessary to manually restart the httpd server after upgrading the packages. In order to do this, execute the following as root: service apache 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 apache start REFERENCES 1. http://httpd.apache.org/ 2. http://www.idefense.com/advisory/04.08.03.txt 3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0132 4. http://www.apache.org/dist/httpd/Announcement2.html 5. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=17206 UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/9/SRPMS/apache-2.0.45-28790U90_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-devel-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-doc-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-htpasswd-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-static-2.0.45-28790U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr0-2.0.45-28790U90_1cl.i386.rpm ADDITIONAL INSTRUCTIONS The apt tool can be used to perform RPM packages upgrades: - 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 - ------------------------------------------------------------------------- Copyright (c) 2003 Conectiva Inc. http://www.conectiva.com - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : sendmail SUMMARY : Buffer overflow vulnerability DATE : 2003-04-04 15:10:00 REVISED : 2003-04-30 14:50:00 ID : CLA-2003:614 RELEVANT RELEASES : 6.0, 7.0, 8, 9 - ------------------------------------------------------------------------- DESCRIPTION NOTE: this is a revision of the CLA-2003:614 advisory. The only change is the inclusion of this note and packages for Conectiva Linux 9 which was not addressed before. Sendmail[1] is a widely used Mail Transfer Agent (MTA). Michal Zalewski reported[6] a remote vulnerability[5] in sendmail versions 8.12.8 and below. The vulnerability lies in the address parser which performs insufficient bounds checking in certain conditions due to a char to int conversion. It is believed to be possible for remote attackers to cause a Denial of Service condition and to even execute arbitrary commands with the same permissions under which the sendmail daemon runs, which is root. The sendmail authors have released a new version[2], 8.12.9, which fixes this vulnerability. They have also made available patches[3] for older versions, which the packages provided via this announcement contain. Starting with Conectiva Linux 7.0, sendmail is no longer the default mail server and has been replaced with Postfix. But sendmail is still shipped in all Conectiva Linux versions. SOLUTION All sendmail users should upgrade immediately. If the service is already active, it should be restarted after the upgrade in order to close the vulnerability. To do so, execute the following command as root: /sbin/service sendmail restart REFERENCES 1. http://www.sendmail.org/ 2. http://www.sendmail.org/8.12.9.html 3. http://www.sendmail.org/patchps.html 4. http://www.cert.org/advisories/CA-2003-12.html 5. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0161 6. http://marc.theaimsgroup.com/?l=bugtraq&m=104897487512238&w=2 UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sendmail-8.11.6-1U60_4cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-8.11.6-1U60_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-cf-8.11.6-1U60_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-doc-8.11.6-1U60_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sendmail-8.11.6-1U70_4cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-8.11.6-1U70_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-cf-8.11.6-1U70_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-doc-8.11.6-1U70_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/sendmail-8.11.6-2U80_4cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-8.11.6-2U80_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-cf-8.11.6-2U80_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-doc-8.11.6-2U80_4cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/SRPMS/sendmail-8.12.5-26986U90_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-8.12.5-26986U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-cf-8.12.5-26986U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-doc-8.12.5-26986U90_1cl.i386.rpm ADDITIONAL INSTRUCTIONS The apt tool can be used to perform RPM packages upgrades: - 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 - ------------------------------------------------------------------------- Copyright 2003 (c) Conectiva Inc. http://www.conectiva.com
Conectiva Linux Advisories: apache, sendmail
By
Get the Free Newsletter!
Subscribe to Developer Insider for top news, trends, & analysis