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==========================================================================
Ubuntu Security Notice USN-1437-1
May 04, 2012

php5 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

Standalone PHP CGI scripts could be made to execute arbitrary code with
the privilege of the web server.

Software Description:
- php5: HTML-embedded scripting language interpreter

Details:

It was discovered that PHP, when used as a stand alone CGI processor
for the Apache Web Server, did not properly parse and filter query
strings. This could allow a remote attacker to execute arbitrary code
running with the privilege of the web server. Configurations using
mod_php5 and FastCGI were not vulnerable.

This update addresses the issue when the PHP CGI interpreter
is configured using mod_cgi and mod_actions as described
in /usr/share/doc/php5-cgi/README.Debian.gz; however,
if an alternate configuration is used to enable PHP CGI
processing, it should be reviewed to ensure that command line
arguments cannot be passed to the PHP interpreter. Please see
http://people.canonical.com/~ubuntu-security/cve/2012/CVE-2012-2311.html
for more details and potential mitigation approaches.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
  php5-cgi                        5.3.10-1ubuntu3.1

Ubuntu 11.10:
  php5-cgi                        5.3.6-13ubuntu3.7

Ubuntu 11.04:
  php5-cgi                        5.3.5-1ubuntu7.8

Ubuntu 10.04 LTS:
  php5-cgi                        5.3.2-1ubuntu4.15

Ubuntu 8.04 LTS:
  php5-cgi                        5.2.4-2ubuntu5.24

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1437-1
  CVE-2012-1823, CVE-2012-2311

Package Information:
  https://launchpad.net/ubuntu/+source/php5/5.3.10-1ubuntu3.1
  https://launchpad.net/ubuntu/+source/php5/5.3.6-13ubuntu3.7
  https://launchpad.net/ubuntu/+source/php5/5.3.5-1ubuntu7.8
  https://launchpad.net/ubuntu/+source/php5/5.3.2-1ubuntu4.15
  https://launchpad.net/ubuntu/+source/php5/5.2.4-2ubuntu5.24

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