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Nginx, even though young by World Wide Web years, is as popular as Apache today. In this series of challenges, we hope to explore how attackers can exploit webapps running on Nginx arising due to server misconfigurations and/or application vulnerabilities. Take a look at the scenario below:
The target server has not been properly secured against arbitrary file upload and execution vulnerability. The administrator has used a blacklisting approach but forgotten to add other executable file extensions to this list. This example also proves why blacklisting is not considered a good security measure.
Objective: Your objective is to upload a web shell, execute arbitrary commands on the server and retrieve the flag!
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