Fawn (Tier 0)
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Tier -> 0
Difficult -> Very Easy
OS -> Linux
Tags -> FTP / Protocols / Reconnaissance / Anonymous-Guest Access
With a little research, I started answering the first questions
Answer: File Transfer Protocol
Answer: 21
Answer: sftp
Answer: ping
Then I did an exhaustive scan to get information on the services running on the found ports
With this and a little research, I answered the next questions
Answer: vsftpd 3.0.3
Answer: Unix
Answer: ftp -h
Answer: anonymous
I identified a port that was running the FTP protocol, so I could try connecting through this. As I didn't have any credentials, I tried logging in as an anonymous user which wouldn't ask for a password, and with this, I successfully got in
With this and a little research, I answered the next questions
Answer: 230
Answer: ls
Answer: get
Once inside, I listed the files being shared in the FTP server and found a flag.txt file. So I used the internal get command to download the flag.txt file from the server and then closed the connection
Having it locally, I checked the content of the file finally retrieving the root flag
With this, I got the root flag and pwned the machine
Answer: 035db21c881520061c53e0536e44f815
Then I did an initial port scan using
To learn more about the FTP protocol you can go
