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Setuid and Setgid when set for a binary, allow the binary to run with the privileges of the owner user or group respectively.
In this lab, we are given SSH access on the target machine. The flag is not on
machine yet and will only be available after the "wait" file present in student user's home directory is deleted. However, the deletion of this file will change the admin user's password and restart SSH. Hence, to retrieve the flag, we have to maintain access on admin user's account on the target system.
Initial SSH Credentials
- Maintain access on admin user's account by leveraging the setuid and setgid.
- Retrieve flag from target machine.
- Setuid and Setgid (https://attack.mitre.org/techniques/T1100/)
- This lab is dedicated to you! No other users are on this network :)
- Once you start the lab, you will have access to a root terminal of a Kali instance
- Your Kali has an interface with IP address 192.X.Y.Z. Run "ip addr" to know the values of X and Y.
- The target server should be located at the IP address 192.X.Y.3.
- Do not attack the gateway located at IP address 192.X.Y.1
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
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