---
# System prepended metadata

title: 'NCtfU - 3/22 (Reverse, PWN) (A205)'
tags: [nctfu2021, 新手場]

---

# NCtfU - 3/22 (Reverse, PWN) (A205)
###### tags: `新手場` `nctfu2021`

## 會參加
- Onebone
- idisused
- ppodds
- yenchia
- 石頭 (線上，晚到)
<!--------------------->

## 講者
- Onebone

## demo 筆記

## 會後問卷

## 下週報告

## 直播存檔

[Youtube](https://youtu.be/v8Lzt5bw9h0) 

## 講者筆記
- 事前準備
### 工具使用介紹
- gdb
    - attach
    - `echo 0 /proc/sys/kernel/`
- pwntools
    - recv
        - recvline()
        - recvuntil()
    - send
    - p32 / p64
    - u32 / u64
    - context 
        - arch
        - os
        - endian
        - terminal
    - asm
    - shellcraft
    - gdb attach
    - interactive
- gcc security
    - Pie
    - canary
    - NX
    - RELRO
- 上課教材
    - picoCTF2021

### Easy PWN
- Stack frame
- 

## 共筆

- shellcraft.amd64().sh()
- hex()