CVE:CVE-2002-1593
CNNVD:CNNVD-200209-068
Apache 2.0.42之前版本的mod_dav不能正确处理版本控制钩。远程攻击者借助preforked多进程模型的空解引用导致服务拒绝（CPU消耗）注销子程序。
solution:Upgrade apache http_server to a higher version than 2.0,2.0.28,2.0.32,2.0.35,2.0.36,2.0.37,2.0.38,2.0.39,2.0.40,2.0.41,and avoid the version 2.0,2.0.28,2.0.32,2.0.35,2.0.36,2.0.37,2.0.38,2.0.39,2.0.40,2.0.41
solution:Upgrade microsoft java_virtual_machine to a higher version than 1.1,and avoid the version 1.1