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Based on the responses in this thread, I feel like you could present this screenshot with a "I bet you couldn't find your way out of this!" and a zip of the directory, and a significant number of users would voluntarily download it and extract it just to "prove that they could".
Genuinely my first response. What are VMs for?
I run QubesOS BTW. My entire computer is just a bunch of VMs in a trench coat.
Well yeah? And you do it in a vm. But seems like a decently simple problem anyway. ls -al and compare the sizes.
Obvioulsy whoever set this minefield thought about this
The greatest trick is to make your opponent think you thought of everything. Powering off might just straight up work and they're just bluffing, might as well try
\cd ~
When people don't know normal things we learned in '92, I get worried.
Instead of acting like an asshole, teach us.
Oof. I consider myself a fairly decent Linux Sysadmin (~15 years experience ~10 years professionally) but I actually didn't know about that. :/
what does this change?
Bypasses aliases and uses the original command
Combat the minefield with a fork bomb. Ainβt no process surviving this engagement.
They never guess the next move: Unplugs pc
loud knocking on the door
Either that or the PC keeps running anyway.
Boston Dynamics: βEither that or the PC keeps running away.β
How can you prevent users from leaving a directory?
chroot, and override exit with an alias,could work
Magic, I guess, 'cause nothing in the sceenshot would do it, unless the attacker had already replaced cat with a trojan or something.
AFAIK, thereβs no way to without modifying the system tools and shell.
How can you prevent a shutdown using a power key?
There's an Emacs command to do that
C-x M-c M-minefield
You could probably install a handler for the event that's triggered when the power button is pressed. Most OSes do that and pop up a graceful shutdown options window. Most hardware will have a hard shutdown option when you hold the power button for a few seconds. You would probably have to overwrite the BIOS or something at that level to prevent that way out.
You could also just unplug it.
I can think of a way out:
Just throw the whole PC away. It's someone else's problem now!
But that just becomes a Jumanji issue
Reminds me of gameshell, which is a rogue-like game designed to teach you the unix shell. So instead of navigating with NESW, you cd to locations. At one point you search the "garden", which is an unmanageable tangle of directories, with find.
Reminder that binaries cannot change a shell's working directory, so the non-mines will do nothing.
(cd is a shell builtin)
Technically they could if run as root by modifying the parent process
it could just reinvoke $SHELL in the parent dir
I mean, you can just write a whole custom shell for this
while this is not real, something similar in principal very much was! (but not too widespread)
see here or look up "casino dos malware"
uh in short it erases "the disk's" (unsure which) file allocation table (pretty much the dos/windows version of a superblock). apparently some versions did copy it to memory and give the user a chance though!
Maybe something like find ./ -type f | xargs md5sum, then avoid the one directory where the executable has a different checksum. Heck, even find | ls might suffice.
This could be trivially defeated by a program which erases the hard drive unless run using a particular executable name. Then, all twenty entries could simply be hard links to the same executable file on disk, but one of the names would trigger different behavior.
Has "let's play a game" vibes
objdump -D * | less
We have squid games at home.
Squid games at home:
Does it have a perpetual energy source if I unplug it?
There was an old virus that would copy your FAT table to ram, erase it from disk, and preset you with a slot machine UI where you would gamble to get the FAT back, if you won, great, the virus would write the FAT back to the drive, if not, you lost everything.
Rebooting without playing meant loosing everything.
FAT Table
Can I just pay? I can go to the ATM Machine and enter my PIN Number
You forget that FAT stands for "File Allocation Travesty."
ctrl-D
What did the minefield directory do here to hijack cd?
Can an alias be applied upon cd?
ls -lah