IMPORTANT:AttackDefense Labs is included with a Pentester Academy subscription! Upgrade Now to access over 1800+ Labs.

Already a Pentester Academy student? Your access will continue uninterrupted. Please use the same Google account to login here.

Not a Pentester Academy student? Try our Free Communitiy Labs

File Permissions

linux-privilege-escalation | Level: Easy  | Total Lab Runs: 0 | Premium Lab

Lab Scoreboard

Lab Walkthrough Video:

Linux File Permissions are the access control enforced by Linux to prevent unauthorized access on resources.

Objective: Learn about File Permissions by doing the following activities and answering questions.

  1. Who is the owner of file /work/guidelines?

  2. Who is the owner of file /work/readme.txt?

  3. Who is the group of file /work/readme.txt?

  4. Can the user teacher read the file /work/readme.txt?

  5. Can user student read the file /work/guidelines?

  6. Make /work/shell executable.

  7. Find all world-readable files.

  8. Find all world-writable files.

  9. Create a new directory /work/sample. Set its permissions such that only the user can read.

  10. Change the group of binary shell to admin group.

  11. Change owner of binary shell to student user.

  12. Find all binaries for which the setuid bit is set.

  13. Set setuid bit for /bin/bash. Change to user student (using switch user or su) and see if root access can be achieved (without exiting back to).

The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:

  • Using automated scanners
  • Using brute force attacks
  • Denial of Service attacks
  • Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
  • Attacking the lab infrastructure

Users violating the above will be either temporarily or permanently banned from the website. 

If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.

Technical Support for this Lab:

There is a reason we provide unlimited lab time: you can take as much time as you need to solve a lab. However, we realize that sometimes hints might be necessary to keep you motivated!

We currently provide technical support limited to:

  • Giving hints for a lab exercise
  • In rare circumstances, if you have totally given up (NO!!!) then tell you how to solve it. This will be limited to sharing the solution video or lab report
  • A lab exercise fails to load or has errors in it

If you need technical support, please email  clearly mention the name and link of the lab exercise and other essential details. The more descriptive you are, the faster we can help you. We will get back to you within 24 hours or less. 

For adminitrative queries, billing, enterprise accounts etc. please email