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RITSEC18 Gimme sum fud

 ·  ☕ 1 min read

The binary loads the flag.txt to the memory and asks us to provide input.

Interesting things is that it loads to the same memory segment with the input.

Debugging locally, I found it at the offset 752 from the first input bytes.

Running it multiple times on the server and at sometimes, the null bytes will be all-cleared and puts will print it all.

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Nguyen Hoang Trung
Nguyen Hoang Trung
Hobbyist Security Researcher