Classic Passwd

Practice your skills in reversing and get the flag bypassing the login

This can be done using multiple ways. We will do this using ltrace.

ltrace, traces the calls to the library function. It executes the program in that process.

Make the Challenge.Challenge file executable. chmod +x Challenge.Challenge

Command is ltrace <file_name>

Type, anytime when asked for input. Here I typed testing. Check before authentication error, the word testing is compared with another word using strcmp function. So maybe the program is checking the input with the word AGB6js5d9dkG7 and if they are same, it will print the flag.

Let’s check

And BOOM , we got the flag.