Stefan Esser discovered that cacti, a front-end to rrdtool for monitoring systems and services, is not properly validating input passed to the rra_id parameter of the graph.php script. Due to checking the input of $_REQUEST but using $_GET input in a query an unauthenticated attacker is able to perform SQL injections via a crafted rra_id $_GET value and an additional valid rra_id $_POST or $_COOKIE value. For the stable distribution , this problem has been fixed in version 0.8.7b-2.1+lenny3. For the testing distribution , this problem will be fixed soon. For the unstable distribution , this problem has been fixed in version 0.8.7e-4. We recommend that you upgrade your cacti packages.