=========================================================================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

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:
  https://ubuntu.com/security/notices/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