ZoneAlarm and ZoneAlarm Pro before 5.5.062, with ad-blocking enabled, allows remote web sites to cause a denial of service (application instability or system hang) via certain JavaScript.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18159
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-1528
http://www.securityfocus.com/bid/11706
http://secunia.com/advisories/13244/