CVE:CVE-2000-0553
CNNVD:CNNVD-200005-095
当配置重叠的"return-rst"和  "keep state"规则，IPFilter防火墙存在竞争条件漏洞。远程攻击者借助此漏洞可以绕过访问限制。
solution:Upgrade darren_reed ipfilter to a higher version than 3.3.15,3.4.3,and avoid the version 3.3.15,3.4.3