Ubuntu Security Notice 320-2 – USN-320-2 fixed several vulnerabilities in PHP. James Manning discovered that the Ubuntu 5.04 update introduced a regression, the function tempnam() caused a crash of the PHP interpreter in some circumstances. The updated packages fix this.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/48632/USN-320-2.txt
Source: https://packetstormsecurity.com/files/48632/Ubuntu-Security-Notice-320-2.html