# Findiff - [pwn]
- **_pts : 729pts_**
- **_Solver : J0ngBae_**

## 1. Abstract
- _Binary Diffing (Bindiff)_
- _Buffer Overflow_

## 2. Analysis
This challenge provides two binary files.
Initially, I wasn't sure why two files were provided, but I could infer the hint from the title and description of the challenge.

- vsftpd : Original vsftpd binary (Open Source)
- vvsftpd : The binary modified by the operator.

I used bindiff to perform binary diffing to compare and analyze the two binaries, and I found that the similarity was decrease.
- `str_netfd_alloc`
- `init_connection`


### 2-1. init_connection

# PNG - [Forensics]
- **_pts : 200pts_**
- **_Solver : NaraDoSeong_**

## 1. Abstract
- _File Signatures_

## 2. Analysis
This challenge provides PNG file.
At First, You can't open file.