Linux SUID Vulnerability Demonstration

[@rafa_br34]

Helped me a bit to understand how the SUID bit works, but what would even be the reason to add the SUID bit to some executable?

[@tbone907]

Great video! Thanks for sharing.

[@zuberkariye2299]

Amazing Demo!

[@janb.9425]

Breaking news:
Allowing users to execute a shell as root allows them to get a root shell

[@ahmedamr1124]

Nice observation

[@AmazingJayB51]

can you block someone from using zsh?

[@adebolama2686]

At 8:54 when you typed zsh you were login as root that's why you have the # in your prompt and I guess that was why it didn't ask for permission you are running in root context not as an ordinary user

[@hetsonii]

He got the root zsh because SUID bit was set for zsh.
If it wasn't the case, he would have got the non-root zsh. that's the whole point of SUID Vulnerabilities!

[@creed404]

That’s the point he was trying to explain!

[@Michael_Jackson187]

​@@hetsoniiWhat admin in there right fucking mind would set the SUID on a fucking shell, there are some things that need to be run as root and you can use something like gtfobin to escape then and get a sh. i remember using man to privesc during the eJPTv2 exam, this would be a more practical way of privesc like finding out what is already allowed on the system to run as root for the user by typing sudo -l and heading over to gtfobins for example "man"
sudo man man
!/bin/sh

[@AintLoose_60]

What if u are not in sudoers group

[@firsfnamelastname8490]

It’s not a vulnerability but a functionality

[@creed404]

A functionality that leads to vulnerabilities like any functionality

[@rafa_br34]

@@creed404 Just like TCP...