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TCP1PCTF was organized by Indonesian and it was opened to anyone. For this challenge specifically, it was really good. I do need to read the source code as well as chaining multiple vulnerabilities such as SQL Injection, SSRF and Insecure Deserialization to get RCE.

This is a web challenge related to TOTP and some bruteforce operation.

This is a boot2root challenge, related to basic OS injection, some real world related account takeover and basic privilages escalation.