For the past week I've been trying to get to the bottom of an exploit, but googling hasn't been much help so far, nor has my service provider. Basically a file was uploaded with the filename xxx.php.pgif which contained nasty php code, and then the file was run directly from a browser. The upload script used to upload this file checks that the upload filename doesn't have a .php extension, which in this case it doesn't, so let it through. I was under the impression apache would serve any file with an extension not listed in its handlers directly back to the browser, but instead it sent it to the php handler. Is this normal behaviour or is there a problem with my service provider's apache configuration? Trying this on my localhost returns the file contents directly to the browser as expected and doesn't run the php code.