# rop32

## Problem

> Can you exploit the following program to get a flag? You can find the program in /problems/rop32\_4\_0636b42072627d283f46d2427804b10c on the shell server. Source.

* [Program](https://github.com/HHousen/PicoCTF-2019/tree/24b0981c72638c12f9a8572f81e1abbcf8de306d/Binary%20Exploitation/rop32/vuln/README.md)
* [Source](https://github.com/HHousen/PicoCTF-2019/tree/24b0981c72638c12f9a8572f81e1abbcf8de306d/Binary%20Exploitation/rop32/vuln.c)

## Solution

1. Get padding by running `python2 -c "from pwn import *; print cyclic(50)" | ./vuln` then `dmesg | tail` to get segfault address of `0x61616168` then `cyclic_find(0x61616168)` to get padding of `'a'*28`
2. Run `python ROPgadget.py --binary ./vuln --rop --badbytes "0a"` to get ROP chain
3. Paste in padding of `'a'*28`
4. Run [script.py](https://github.com/HHousen/PicoCTF-2019/tree/24b0981c72638c12f9a8572f81e1abbcf8de306d/Binary%20Exploitation/rop32/script.py) for remote execution
5. Run `cat flag.txt` in the shell that spawns

### Flag

`picoCTF{rOp_t0_b1n_sH_dee2e288}`


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://picoctf2019.haydenhousen.com/binary-exploitation/rop32.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.