137 lines
5.4 KiB
Python
137 lines
5.4 KiB
Python
#!/usr/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
import os
|
|
import re
|
|
|
|
|
|
# Replace the nth occurrence of a string
|
|
# Inspired from https://stackoverflow.com/questions/35091557/replace-nth-occurrence-of-substring-in-string
|
|
def nth_replace(string, old, new, n):
|
|
if string.count(old) >= n:
|
|
left_join = old
|
|
right_join = old
|
|
groups = string.split(old)
|
|
nth_split = [left_join.join(groups[:n]), right_join.join(groups[n:])]
|
|
return new.join(nth_split)
|
|
return string.replace(old, new)
|
|
|
|
|
|
# Display the found vulnerability with basic information like the line
|
|
def display(path, payload, vulnerability, line, declaration_text, declaration_line, colored, occurrence, plain):
|
|
# Potential vulnerability found : SQL Injection
|
|
header = "{}Potential vulnerability found : {}{}{}".format('' if plain else '\033[1m', '' if plain else '\033[92m', payload[1], '' if plain else '\033[0m')
|
|
|
|
# Line 25 in test/sqli.php
|
|
line = "n°{}{}{} in {}".format('' if plain else '\033[92m', line, '' if plain else '\033[0m', path)
|
|
|
|
# Code : include($_GET['patisserie'])
|
|
vuln = nth_replace("".join(vulnerability), colored, "{}".format('' if plain else '\033[92m') + colored + "{}".format('' if plain else '\033[0m'), occurrence)
|
|
vuln = "{}({})".format(payload[0], vuln)
|
|
|
|
# Final Display
|
|
rows, columns = os.popen('stty size', 'r').read().split()
|
|
print("-" * (int(columns) - 1))
|
|
print("Name \t{}".format(header))
|
|
print("-" * (int(columns) - 1))
|
|
print("{}Line {} {}".format('' if plain else '\033[1m', '' if plain else '\033[0m', line))
|
|
print("{}Code {} {}".format('' if plain else '\033[1m', '' if plain else '\033[0m', vuln))
|
|
|
|
# Declared at line 1 : $dest = $_GET['who'];
|
|
if "$_" not in colored:
|
|
declared = "Undeclared in the file"
|
|
if declaration_text != "":
|
|
declared = "Line n°{}{}{} : {}".format('' if plain else '\033[0;92m', declaration_line, '' if plain else '\033[0m', declaration_text)
|
|
|
|
print("{}Declaration {} {}".format('' if plain else '\033[1m', '' if plain else '\033[0m', declared))
|
|
|
|
# Small delimiter
|
|
print("")
|
|
|
|
|
|
# Find the line where the vulnerability is located
|
|
def find_line_vuln(payload, vulnerability, content):
|
|
content = content.split('\n')
|
|
for i in range(len(content)):
|
|
if payload[0] + '(' + vulnerability[0] + vulnerability[1] + vulnerability[2] + ')' in content[i]:
|
|
return str(i - 1)
|
|
return "-1"
|
|
|
|
|
|
# Find the line where the entry point is declared
|
|
# TODO: should be an array of the declaration and modifications
|
|
def find_line_declaration(declaration, content):
|
|
content = content.split('\n')
|
|
for i in range(len(content)):
|
|
if declaration in content[i]:
|
|
return str(i)
|
|
return "-1"
|
|
|
|
|
|
# Format the source code in order to improve the detection
|
|
def clean_source_and_format(content):
|
|
# Clean up - replace tab by space
|
|
content = content.replace(" ", " ")
|
|
|
|
# Quickfix to detect both echo("something") and echo "something"
|
|
content = content.replace("echo ", "echo(")
|
|
content = content.replace(";", ");")
|
|
return content
|
|
|
|
|
|
# Check the line to detect an eventual protection
|
|
def check_protection(payload, match):
|
|
for protection in payload:
|
|
if protection in "".join(match):
|
|
return True
|
|
return False
|
|
|
|
|
|
# Check exception - When it's a function($SOMETHING) Match declaration $SOMETHING = ...
|
|
def check_exception(match):
|
|
exceptions = ["_GET", "_REQUEST", "_POST", "_COOKIES", "_FILES"]
|
|
for exception in exceptions:
|
|
if exception in match:
|
|
return True
|
|
return False
|
|
|
|
|
|
# Check declaration
|
|
def check_declaration(content, vuln, path):
|
|
# Follow and parse include, then add it's content
|
|
regex_declaration = re.compile("(include.*?|require.*?)\\([\"\'](.*?)[\"\']\\)")
|
|
includes = regex_declaration.findall(content)
|
|
|
|
# Path is the path of the current scanned file, we can use it to compute the relative include
|
|
for include in includes:
|
|
relative_include = os.path.dirname(path) + "/"
|
|
try:
|
|
path_include = relative_include + include[1]
|
|
with open(path_include, 'r') as f:
|
|
content = f.read() + content
|
|
except Exception as e:
|
|
return False, "", ""
|
|
|
|
# Extract declaration - for ($something as $somethingelse)
|
|
vulnerability = vuln[1:].replace(')', '\\)').replace('(', '\\(')
|
|
regex_declaration2 = re.compile("\\$(.*?)([\t ]*)as(?!=)([\t ]*)\\$" + vulnerability)
|
|
declaration2 = regex_declaration2.findall(content)
|
|
if len(declaration2) > 0:
|
|
return check_declaration(content, "$" + declaration2[0][0], path)
|
|
|
|
# Extract declaration - $something = $_GET['something']
|
|
regex_declaration = re.compile("\\$" + vulnerability + "([\t ]*)=(?!=)(.*)")
|
|
declaration = regex_declaration.findall(content)
|
|
if len(declaration) > 0:
|
|
|
|
# Check constant then return True if constant because it's false positive
|
|
declaration_text = "$" + vulnerability + declaration[0][0] + "=" + declaration[0][1]
|
|
line_declaration = find_line_declaration(declaration_text, content)
|
|
regex_constant = re.compile("\\$" + vuln[1:] + "([\t ]*)=[\t ]*?([\"\'(]*?[a-zA-Z0-9{}_\\(\\)@\\.,!: ]*?[\"\')]*?);")
|
|
false_positive = regex_constant.match(declaration_text)
|
|
|
|
if false_positive:
|
|
return True, "", ""
|
|
return False, declaration_text, line_declaration
|
|
|
|
return False, "", ""
|