> For the complete documentation index, see [llms.txt](https://picoctf2021.haydenhousen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://picoctf2021.haydenhousen.com/binary-exploitation/whats-your-input.md).

# What's your input?

## Problem

> We'd like to get your input on a couple things. Think you can answer my questions correctly? in.py nc mercury.picoctf.net 39137.

* [in.py](https://github.com/HHousen/PicoCTF-2021/blob/master/Binary%20Exploitation/What%27s%20your%20input?/in.py)

## Solution

1. Look at the [in.py](https://github.com/HHousen/PicoCTF-2021/blob/master/Binary%20Exploitation/What%27s%20your%20input?/in.py) file, which is executed using Python 2.
2. The Python 2 input function is vulnerable. More info on [GeesForGeeks](https://www.geeksforgeeks.org/vulnerability-input-function-python-2-x/).
3. We can enter the variable name `city` as the city input parameter which will essentially set `res = city`.

### Flag

`picoCTF{v4lua4bl3_1npu7_8433797}`


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