Microsoft Internet Explorer 5.5 through 6.0 allows remote attackers to cause a denial of service (crash) via a Cascading Style Sheet (CSS) with the p{cssText} element declared and a bold font weight.
https://exchange.xforce.ibmcloud.com/vulnerabilities/9367
http://online.securityfocus.com/archive/1/277140/2002-12-07/2002-12-13/2