Typo3 4.5 < 4.7 - Remote Code Execution / Local File Inclusion / Remote File Inclusion

• Exploit Database
• 19 阅读

• 作者： MaXe
  日期： 2012-01-04
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/18308/

• # Exploit Title: Typo3 v4.5-4.7 - Remote Code Execution (RFI/LFI)
  # Date: 4th January 2012
  # Author: MaXe
  # Software Link: https://typo3.org/download/
  # Version: 4.5.0 up to 4.5.8, 4.6.0 and 4.6.1 (+ development releases of
  4.7 branch) 
  
   
  Typo3 v4.5-4.7 - Remote Code Execution (RFI/LFI)
   
   
  Versions Affected: 4.5.0 up to 4.5.8, 4.6.0 and 4.6.1 (+ development
  releases of 4.7 branch) 
  
  Info:
  TYPO3 is a small to midsize enterprise-class Content Management Framework
  offering 
  the best of both worlds: out-of-the-box operation with a complete set of
  standard
  modules and a clean and sturdy high-performance architecture accomodating
  virtually
  every kind of custom solution or extension. 
   
  External Links:
  http://typo3.org/
  
  Credits: Björn Pedersen and Christian Toffolo who discovered and reported
  the issue and the Security Team member Helmut Hummel for providing the
  patch. 
  (This advisory was rewritten by MaXe @InterN0T to offer a quick overview
  of the vulnerability, including the removal of all irrelevant and untrue
  details.
  
  
  -:: The Advisory ::-
  Requirements for any RCE: 
  - register_globals in the php.ini MUST be enabled (if the exploit fails
  against a supposed to be vulnerable version, this is why. This setting is
  often disabled by default.)
  
  Requirements for RFI:
  - allow_url_include has to be enabled (It's often "off" by default.) 
  
  
  Proof of Concept: 
  By browsing to a script / page, that uses the following file:
  typo3/sysext/workspaces/Classes/Controller/AbstractController.php (direct
  access may not be allowed)
  It is possible to include PHP code to be executed via the "BACK_PATH"
  global variable. This can be accessed in ways like:
  AbstractController.php?BACK_PATH=LFI/RFI%00
  
  The vulnerable piece of code: require_once($GLOBALS['BACK_PATH'] .
  'template.php');
  Demonstrates, that it is necessary to append a null-byte ( %00 ) after the
  maliciously crafted input / URL. (Unless your remote file if applicable, is
  named something.template.php)
  
  
  -:: Solution ::-
  * Update to the latest version of Typo3 OR change the vulnerable piece of
  code to: require_once(PATH_site . TYPO3_mainDir . 'template.php');
   
   
   
  References:
  - http://typo3.org/fileadmin/security-team/bug32571/32571.diff
  -
  https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2011-004/
  -
  http://news.typo3.org/news/article/important-security-bulletin-pre-announcement-2/