It was discovered that php-net-ping, a PHP PEAR module to execute ping independently of the Operating System, performs insufficient input sanitising, which might be used to inject arguments or execute arbitrary commands on a system that uses php-net-ping. For the stable distribution , this problem has been fixed in version 2.4.2-1+lenny1. For the oldstable distribution , this problem has been fixed in version 2.4.2-1+etch1. For the testing distribution , this problem will be fixed soon. For the unstable distribution , this problem has been fixed in version 2.4.2-1.1. We recommend that you upgrade your php-net-ping packages.