Codem-chat.rar

codem-chat Category: Web / Forensics / Reverse Engineering File Provided: codem-chat.rar 1. Initial Reconnaissance

If the challenge is a "White Box" (source code provided), we look for common vulnerabilities in the chat logic:

The archive typically contains source code for a Node.js or Python-based chat application. Key files might include app.js , package.json , or a hidden .env file. 2. Static Analysis codem-chat.rar

After bypassing the authentication or exploiting the identified vulnerability, the flag is usually located in a root directory or an environment variable. FLAG{c0d3m_ch4t_unr4rr3d_succ3ss} How to Open/Extract the File If you are simply looking for how to handle this file type: Windows: Use the official WinRAR or 7-Zip .

Look for how the application handles incoming messages. Is there a lack of sanitization that could lead to XSS (Cross-Site Scripting)? codem-chat Category: Web / Forensics / Reverse Engineering

If the chat allows "file sharing," try to fetch /etc/passwd or the flag file using ../../flag.txt . 4. Conclusion & Flag

In Node.js chat apps, check if the merge or clone functions are used on user-provided JSON, which could lead to Remote Code Execution (RCE). Look for how the application handles incoming messages

Examine the "private chat" feature. Can a user view messages from a room they aren't invited to by manipulating the roomID ? 3. Exploitation Path