Conectiva alert: apache

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : apache
SUMMARY   : DoS in mod_ssl and log escape sequences vulnerability
DATE      : 2004-04-13 16:52:00
ID        : CLA-2004:839
RELEVANT
RELEASES  : 8, 9

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DESCRIPTION
 Apache[1] is the most popular webserver in use today.
 
 The Apache team disclosed two vulnerabilities[2] in the Apache Web
 Server that affect Conectiva Linux. Both are fixed in this update:
 
 CAN-2003-0020: Unescaped characters in error logs[3]: Apache is not
 filtering escape sequences passed by clients as URLs before writing
 its error logs. An attacker can exploit this vulnerability to, for
 example, pass terminal escape sequences to the logs that when viewed
 in vulnerable terminals[4] may trigger the execution of arbitrary
 commands. This vulnerability has been fixed in Apache 2.0.49 and a
 backported patch is included in this update.
 
 CAN-2004-0113: Denial of Service in mod_ssl[5]: A memory leak has
 been discovered in mod_ssl that may be triggered by sending normal
 HTTP requests to the Apache HTTPS port. An attacker can exploit this
 vulnerability to consume all memory available in the server, thus
 causing a denial of service condition. This problem has been fixed in
 Apache 2.0.49 and a backported patch is included in this update. This
 issue does not affect Conectiva Linux 8 (which has Apache 1.3.X).
 
 Additionally, this update includes a fix for a denial of service
 issue[6] which is reported to not affect Apache on Linux systems.


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 httpd stop
 
 (wait a few seconds and check with "pidof httpd" if there are any
 httpd processes running. On a busy webserver this could take a little
 longer)
 
 # service httpd start
 
 
 REFERENCES
 1.http://apache.httpd.org/
 2.http://www.apacheweek.com/features/security-20
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0020
 4.http://www.digitaldefense.net/labs/papers/Termulation.txt
 5.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0113
 6.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0174


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/RPMS/apache-1.3.28-1U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/apache-devel-1.3.28-1U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/apache-doc-1.3.28-1U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/apache-1.3.28-1U80_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-devel-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-doc-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-htpasswd-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr0-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-static-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/mod_auth_ldap-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/mod_dav-2.0.45-28790U90_6cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/apache-2.0.45-28790U90_6cl.src.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 regarding 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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Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com

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