24Tem
Why can I cat a file I can’t find? [migrated]
I'm working on a TryHackMe problem (Task 15 here) to exploit a vulnerable component of a website to gain RCE and then read the contents of /opt/flag.txt.
The targeted website uses an IP generated by TryHackMe which is different on each attempt, so I can't link to it. The exploit is here.
I can read the file using cat /opt/flag.txt; but find -name 'flag.txt' and find -name '/opt/flag.txt' return no result; attempts to cd to /. or to the parent of the cwd are unsuccessful; and ls -a doesn't list flag.txt in the cwd.
Why can I cat a file that I can't find, and that doesn't appear to be in the cwd?
