For educational purposes etc.
Tested on Ubuntu 20.04 against sudo 1.8.31
All research credit: Qualys Research Team Check out the details on their blog.
You can check your version of sudo is vulnerable with: $ sudoedit -s Y.
If it asks for your password it's most likely vulnerable, if it prints usage information it isn't.
You can downgrade to the vulnerable version on Ubuntu 20.04 for testing purposes with $ sudo apt install sudo=1.8.31-1ubuntu1
$ make
$ ./exploit