20190929 (picoCTF 2019)
===

###### tags: `Write-up`、`2019`、`九月`、`組內讀書會`

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# 會議紀錄

## 時間地點

時間：2019/09/29 14:00 ~ 16:00
地點：逢甲大學 資電館 237

## 出席成員

實體出席：可晴、飛飛、Amanda、Sarah
線上出席：CCC、威威、Bakery

##  picoctf.com

picoCTF is a free computer security game targeted at middle and high school students, created by security experts at Carnegie Mellon University.

# Write-up

https://hackmd.io/@HG-CTF/r18K90ZFB

## 提問區

- mus1c - Points: 300
- https://2019shell1.picoctf.com/static/cec2afb810628ca35e9fcb031408a9dd/lyrics.txt
- I wrote you a song. Put it in the picoCTF{} flag format
- Hints : Do you think you can master rockstar?
> [name=ddaa] 應該是按照歌詞把 Put xxx into ooo 進行替換, 替換到最後的就會是 flag
- flag_shop - Points: 200
- There's a flag shop selling stuff, can you buy a flag? Source. Connect with nc 2019shell1.picoctf.com 60851.
- Hints：Two's compliment can do some weird things when numbers get really big!
> [name=ddaa] 題目跟敘述好像對不起來 (?), Worldwide 可能是把經緯度的地名當成文字之類的, flag_shop 有邏輯漏洞可以發大財

- Java Script Kiddie - Points: 400
- The image link appears broken...https://2019shell1.picoctf.com/problem/37330 or http://2019shell1.picoctf.com:37330
- Hints：This is only a JavaScript problem.

picoCTF{FLAG}