The remote host is missing an update to php5 announced via advisory USN-824-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: php5-cgi 5.1.2-1ubuntu3.15 php5-cli 5.1.2-1ubuntu3.15 Ubuntu 8.04 LTS: php5-cgi 5.2.4-2ubuntu5.7 php5-cli 5.2.4-2ubuntu5.7 Ubuntu 8.10: php5-cgi 5.2.6-2ubuntu4.3 php5-cli 5.2.6-2ubuntu4.3 Ubuntu 9.04: php5-cgi 5.2.6.dfsg.1-3ubuntu4.2 php5-cli 5.2.6.dfsg.1-3ubuntu4.2 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-824-1

It was discovered that PHP did not properly handle certain malformed JPEG images when being parsed by the Exif module. A remote attacker could exploit this flaw and cause the PHP server to crash, resulting in a denial of service.