![]() To bypass ModSec and enable the RCE to work, we needed to add something to the end of the cookie. We can encode it by using Burp Suite like so : Specifically, we can leverage nodejsshell.py to generate a shell, and then use base64 to encode it. To create a payload, we can follow the tutorial provided in the article. It suggests that there may be a deserialization exploit in play, and that ModSec could be a key factor related to the use of cookies. Upon investigating potential vulnerabilities related to cookies and Express, I came across an informative article at exploiting-node-js-deserialization-bug-for-remote-code-execution. The article explains how the use of a second equals sign within the cookie parameter may result in a DoS condition with Mod Security.įrom the website’s architecture, it appears to be built on the Express framework. READ MORE HERE : modsecurity-vulnerability-cve-2019-19886 Further investigation into Mod Security’s cookie-related exploits unearthed several informative articles, including this one: ModSec appears to be the WAF employed to safeguard this webpage, which seems peculiar. I encountered an error while attempting to fuzz the login page using SQL Injection payloads. It appeared as a JWT token, but it was not actually a profile cookie: Furthermore, the website utilized Express as its backend framework, which could assist in identifying potential vulnerabilities related to these cookies Bypassing ModSec (RCE) As I proxied the traffic, I stumbled upon an intriguing cookie. Therefore, I decided to use Burp Suite to inspect the background activity. I didn’t find anything interesting on this page. Luckly,I attempted to login with admin:admin, and it worked! Website : Ī login page greets us at the new domain: Let’s add that to the /etc/hosts file and enumerate there. Assuming the reader has little to no knowledge about either Rdesktop or Arch Linux, this article will provide a detailed explanation of how to use Rdesktop on Arch Linux.Ffuf -w /usr/share/seclists/Discovery/DNS/subdomains-top1million-5000.txt -u -H "Host: /" -fw 3 Rdesktop is a free and open source client for Microsoft’s Remote Desktop Protocol (RDP), used to provide a graphical means of controlling a remote computer. Although RDP is proprietary, Rdesktop is released under the GNU General Public License (GPL).Īrch Linux is a lightweight and flexible Linux distribution that is popular among developers and power users. It is a rolling release distribution, which means that new software is continually added and existing software is updated on a regular basis. One of the benefits of using a rolling release distribution is that you always have access to the latest software versions. To use Rdesktop on Arch Linux, you first need to install the package. ![]() This can be done using the Pacman package manager. Once the package is installed, you can launch Rdesktop from the command line by typing “rdesktop” followed by the IP address or hostname of the remote computer. You will then be prompted to enter your username and password. Once you are logged in, you will be presented with the remote desktop. You can then interact with the remote computer as if you were sitting in front of it. To exit Rdesktop, simply type “exit” at the command prompt. You can learn how to use the Rdesktop Arch Linux operating system in the following steps. This tool enables you to connect to and manage a remote Windows desktop from the comfort of your own home using Linux. When you click the remote window viewer, you’ll be able to see a new window that has been created. Both Linux and Windows PC users can connect to Remmina via its VNC port, which is available for both operating systems. The FreeRDP protocol implements the Remote Desktop Protocol (RDP), allowing you to use your software wherever, whenever, and however you want. How Do I Start Rdesktop? Credit: Raam Dev You can run IMAP/SMTP and SMTP 2.0 as desktop applications by using a free RDP client such as FreeRDP. To start rdesktop, open a terminal window and type the following command: The rdesktop application is used to connect to another computer using the Remote Desktop Protocol (RDP). Replace with the hostname or IP address of the computer you want to connect to. If you are prompted for a username and password, enter the credentials for the account you want to use to connect to the remote computer.
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