BE02 - 100pts

Briefing

Download the file and find a way to get the flag. Contents: rot13

Challenge Files:

• be02.zip

Solution

1. We could decompile the binary using Ghidra to understand how it works, but trial and error is faster for this challenge.

2. Sending a large number of characters as input (a >32 character string) causes a segmentation fault and prints the flag.

3. We can use 33 a's as input to get the flag: python -c "print('a'*33)" | ./rot13.

Flag

luckyNumber13