USN-375-1: PHP vulnerability

3 November 2006

php5 vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10

Software Description


Stefan Esser discovered two buffer overflows in the htmlentities() and htmlspecialchars() functions. By supplying specially crafted input to PHP applications which process that input with these functions, a remote attacker could potentially exploit this to execute arbitrary code with the privileges of the application. (CVE-2006-5465)

This update also fixes bugs in the chdir() and tempnam() functions, which did not perform proper open_basedir checks. This could allow local scripts to bypass intended restrictions.

Update instructions

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

Ubuntu 6.10
libapache2-mod-php5 - 5.1.6-1ubuntu2.1
php5-cli - 5.1.6-1ubuntu2.1
Ubuntu 6.06 LTS
libapache2-mod-php5 - 5.1.2-1ubuntu3.4
php5-cli - 5.1.2-1ubuntu3.4
Ubuntu 5.10
libapache2-mod-php5 - 5.0.5-2ubuntu1.6
php5-cli - 5.0.5-2ubuntu1.6

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.