The Ricardo Narvaja’s challenge aims to learn about IDA Pro, and use it as much as possible. The challenge can be found here and I modified the IDB for a better understanding. This challenge interacts with a file called fichero.dat, read and store in local variables (struct). Since is a small file, I can infer that there […]
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Etiqueta: exploiting
XiomaraCTF 2017 – mint
In this challenge debugging was unneccesary . If I execute it, this is the output:
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$ ./mint ^^^^^^^^^^^^^^ Welcome to My Mini Text editor (Mint) ^^^^^^^^^^^^^^^^^^^^^^^^ [1] Add text [2] Edit text [3] Display text [4] Exit Enter ur option : |
We can add a text, edit and show it. The vulnerability So, I add a text, the max length is 0x30, but if edit the text, there are two options:
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Enter ur option :2 [1] Append text [2] Overwrite |
When I choose the first option, we can […]