Running arbitrary code in Python

gistfile1.py

# Sorry for using Python 2.7
from ctypes import * 
import os, sys

argv = int(sys.argv[1])
argv2 = int(sys.argv[2])

PROT_NONE = 0x0
PROT_READ = 0x1
PROT_WRITE = 0x2
PROT_EXEC = 0x4

buf = ''.join(map(chr, [
    0x55,             # pushq   %rbp
    0x48, 0x89, 0xe5, # movq    %rsp, %rbp
    0x89, 0x7d, 0xfc, # movl    %edi, -4(%rbp)
    0x89, 0x75, 0xf8, # movl    %esi, -8(%rbp)
    0x8b, 0x45, 0xf8, # movl    -8(%rbp), %eax
    0x8b, 0x55, 0xfc, # movl    -4(%rbp), %edx
    0x01, 0xd0,       # addl    %edx, %eax
    0x5d,             # popq    %rbp
    0xc3,             # ret
]))


stringBuffer = create_string_buffer(buf)
print "String Buffer: ",
print(repr(stringBuffer.raw))

codeAddress = addressof(stringBuffer)
print "Code sits in",
print hex(codeAddress)

pageSize = pythonapi.getpagesize()
print "Page Size", pageSize
sizeOfCode = sizeof(stringBuffer)
mask = pageSize - 1


returnedValue = pythonapi.mprotect(~mask&codeAddress, mask&codeAddress + sizeOfCode, PROT_READ|PROT_WRITE|PROT_EXEC)
if returnedValue == -1:
    raise StandardError("Something Bad Happened")

function = cast(stringBuffer, CFUNCTYPE(c_long, c_long))
print "Answer is: ", repr(function(argv,argv2))