BE02 - 100pts - NCS Competition 2021 Writeup

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.
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BE01 - 100pts

BH01 - 500pts

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Contents

Briefing

Solution

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