The remote host is missing an update to php5 announced via advisory USN-761-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libapache2-mod-php5 5.1.2-1ubuntu3.14 php5-cgi 5.1.2-1ubuntu3.14 php5-cli 5.1.2-1ubuntu3.14 Ubuntu 8.04 LTS: libapache2-mod-php5 5.2.4-2ubuntu5.6 php5-cgi 5.2.4-2ubuntu5.6 php5-cli 5.2.4-2ubuntu5.6 Ubuntu 8.10: libapache2-mod-php5 5.2.6-2ubuntu4.2 php5-cgi 5.2.6-2ubuntu4.2 php5-cli 5.2.6-2ubuntu4.2 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-761-1

It was discovered that PHP did not sanitize certain error messages when display_errors is enabled, which could result in browsers becoming vulnerable to cross-site scripting attacks when processing the output. With cross-site scripting vulnerabilities, if a user were tricked into viewing server output during a crafted server request, a remote attacker could exploit this to modify the contents, or steal confidential data (such as passwords), within the same domain. (CVE-2008-5814) It was discovered that PHP did not properly handle the mbstring.func_overload setting within .htaccess files when using virtual hosts. A virtual host administrator could use this flaw to cause settings to be applied to other virtual hosts on the same server. (CVE-2009-0754) It was discovered that PHP did not properly handle certain malformed strings when being parsed by the json_decode function. A remote attacker could exploit this flaw and cause the PHP server to crash, resulting in a denial of service. This issue only affected Ubuntu 8.04 and 8.10. (CVE-2009-1271)