CVE:CVE-2009-4875
CNNVD:CNNVD-201005-362
FCKeditor.Java 2.4存在拒绝服务攻击漏洞，远程攻击者可以通过畸形的包含"ctrl"字符的请求参数导致拒绝服务攻击(死循环)。
solution:Upgrade frederico_caldeira_knabben fckeditor.java to a higher version than 2.4,and avoid the version 2.4