Conectiva Security Announcement: apache

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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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

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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


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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
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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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