MCYSEKA-Maritime Cyber Security Knowledge Archive

Successfully completed the Conversor machine on Hack The Box, focusing on web exploitation and privilege escalation techniques.

For the user flag, initial access was gained by exploiting an insecure XSLT file upload feature. By leveraging EXSLT, I was able to write and execute a malicious script on the server, resulting in a reverse shell as a low-privileged user. Further enumeration uncovered a SQLite database containing hashed credentials, which were cracked to obtain valid SSH access and retrieve the user flag.

For the root flag, privilege escalation was achieved through a misconfigured sudo permission allowing execution of needrestart. This was abused to run a crafted script that modified system binaries, ultimately granting root-level access via a SUID bash shell and completing the machine.

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