Extracting & Submitting Forms Automatically
Target website:http://10.0.0.45/dvwa/vulnerabilities/xss_r/
Class Scanner.
#!/usr/bin/env pythonimport requests
import re
from bs4 import BeautifulSoup
from urllib.parse import urljoinclass 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=")(.*?)" rel="external nofollow" rel="external nofollow" ', 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.decode(), 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)
Vulnerability scanner.
#!/usr/bin/env pythonimport scannertarget_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()
forms = vuln_scanner.extract_forms("http://10.0.0.45/dvwa/vulnerabilities/xss_r/")
print(forms)
response = vuln_scanner.submit_form(forms[0], "testtest", "http://10.0.0.45/dvwa/vulnerabilities/xss_r/")
print(response.content.decode())
The program runs fine.
Polish the Class Scanner to a generic scanner.
#!/usr/bin/env pythonimport requests
import re
from bs4 import BeautifulSoup
from urllib.parse import urljoinclass 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=")(.*?)" rel="external nofollow" rel="external nofollow" ', 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.decode(), 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) if "=" in link:
print("[+] Testing " + link)
