CrossCTF_2017: Patching Secrit Donut Tuch

Category: Defense Points: 150 Description:

Patch the secrit-binary-dunut-tuch! Use the following command curl -v -F secretKey=@localFile 192.168.0.30:8080/api/secrit_binary_donut_tuch Binary to patch here

Write-up

This one is an extension of Patching transformer as it can be solved in a similar way. The key idea is simple, to convert all the JNE symbols to JMP symbols to skip the section of code that will print the flag.

Screenshot 1

Screenshot 1

Solution.

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