---
# System prepended metadata

title: "NCtfU - 3/29 (Reverse, PWN \U0001F383) (A205)"
tags: [nctfu2021, 新手場]

---

# NCtfU - 3/29 (Reverse, PWN 🎃) (A205)
###### tags: `新手場` `nctfu2021`

## 會參加
- Onebone
- idisused
- yenchia
- No_ball

## 講者
- 🎃


## 直播存檔


## 講者筆記

https://hackmd.io/dtSuef_hR0qhf6c68xojyg

## 共筆

- malloc => heap
- fgets(buffer, size, file struct ptr)
- file descriptor == file ID
    - 0 -> stdin  (read(0, buf, size))
    - 1 -> stdout (write(1,buf, size))
    - 2 -> stderr
- %1$p value
- %1$S address



execve("/bin/sh", NULL, NULL)