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#!/usr/bin/python | |
# from http://stackoverflow.com/questions/19326409/python-ctype-segmentation-fault | |
import ctypes | |
shellcode_data = (b"\x6a\x3b\x58\x99\x48\xbb\x2f\x62\x69\x6e\x2f\x73\x68\x00\x53" | |
b"\x48\x89\xe7\x68\x2d\x63\x00\x00\x48\x89\xe6\x52\xe8\x10\x00" | |
b"\x00\x00\x2f\x75\x73\x72\x2f\x62\x69\x6e\x2f\x77\x68\x6f\x61" | |
b"\x6d\x69\x00\x56\x57\x48\x89\xe6\x0f\x05") | |
shellcode = ctypes.create_string_buffer(shellcode_data) | |
function = ctypes.cast(shellcode, ctypes.CFUNCTYPE(None)) | |
addr = ctypes.cast(function, ctypes.c_void_p).value | |
libc = ctypes.CDLL('libc.so.6') | |
pagesize = libc.getpagesize() | |
addr_page = (addr // pagesize) * pagesize | |
for page_start in range(addr_page, addr + len(shellcode_data), pagesize): | |
assert libc.mprotect(page_start, pagesize, 0x7) == 0 | |
function() |
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