New Video from @NahamSec: Beginner Hacker Discovers Critical RCE Vulnerability on Netflix

In this video, NahamSec presents a captivating interview with Matine, a beginner hacker who discovered a critical Remote Command Execution (RCE) vulnerability on Netflix, earning a $5,000 reward. This discovery was made possible thanks to NahamSec's monthly initiative, which freely shares reconnaissance data via a Discord bot to help hackers progress. Matine explains his reconnaissance process in detail. He used the reconnaissance data provided by NahamSec's Discord bot and analyzed it with HTTPX to identify active subdomains.

Using tools like Axiom, he filtered the subdomains to focus on those returning a 200 code, indicating they were active and accessible. Among these subdomains, he found a file upload feature that seemed interesting to test. The vulnerability discovered by Matine involved a file upload bypass for PHP files. By using HTTP request manipulation techniques, he succeeded in bypassing file type checks by adding "magic bytes" at the beginning of the file to trick the server into thinking it was a GIF file.

Once this step was completed, he was able to upload a malicious PHP file that executed system commands on the server, thus demonstrating the RCE vulnerability. Matine also shared technical details on how he constructed his payload to exploit the vulnerability. Using tools like Vapalizer to identify the backend technology (PHP in this case), he was able to create a specific payload that executed system commands on the server. He also used scripts to extract JavaScript endpoints, which allowed him to discover interesting APIs to test.

One of the most interesting aspects of this video is the practical demonstration of exploiting the vulnerability. Matine showed how he used tools like Burp Suite to intercept and modify HTTP requests, adding the necessary "magic bytes" to bypass file type checks. He then demonstrated how he uploaded a malicious PHP file and executed system commands on the server, proving the severity of the vulnerability. The video concludes with a discussion on the practical implications of this discovery. Matine spent about a week working on this vulnerability, dedicating several hours a day to research and exploitation.

He emphasizes the importance of perseverance and using the right reconnaissance techniques to discover critical vulnerabilities. He also encourages other hackers to explore file upload features more, as they can often be vulnerable to RCE attacks. In conclusion, this video offers a fascinating insight into the process of discovering and exploiting a critical vulnerability by a beginner hacker. It highlights the importance of reconnaissance and using the right tools to identify and exploit security flaws. For those who want to learn more about cybersecurity and hacking, this video is a valuable resource.