CVE:CVE-1999-0777
CNNVD:CNNVD-199909-041
IIS FTP服务器中存在漏洞，远程攻击者利用该漏洞读取或者删除服务器中的文件，即使他们有“拒绝访问”权限。
solution:Upgrade microsoft commercial_internet_system to a higher version than 2.5,and avoid the version 2.5; Upgrade microsoft internet_information_server to a higher version than 4.0,and avoid the version 4.0