🧰 Pwntools
Installation
Go to the documentation for updated instructions.
http://docs.pwntools.com/en/latest/install.html
You need pwntools installed to use the next utilities.
Checksec
Checksec is a simple utility that tells the security settings of a given binary,
Cyclic
Cyclic is a command available with the pwntools package that generates strings of a length decided by the user. The main use is for memory overflow exploits.
In case of oversized or unlimited inputs, the execution ends with a segmentation fault because the ip on the stack is written with unmeaningful chars. Running Cyclic again with the chars that caused the sigfault, it will return the exact position.
Example
Run pwn cyclic followed by the desired length.
For example, for a string of 100 characters:
pwn cyclic 100
Use the result as input and then check with the value that caused the segmentation fault.
Now, you can rerun cyclic to get the offset.