Agent 95

Author: roerohan

As the name suggest, change the User Agent to Windows 95.

Requirements

• Basic Knowledge of Request headers

Source

• http://jh2i.com:50000.

They've given you a number, and taken away your name~

Connect here:
http://jh2i.com:50000

Exploitation

The challenge is very simple once you know what to do.

We will only give our flag to our Agent 95! He is still running an old version of Windows...

We assume Agent 95 uses Windows 95. So just change the User-Agent header to Mozilla/4.0 (compatible; MSIE 4.01; Windows 95).

>>> import requests
>>> r = requests.get('http://jh2i.com:50000', headers={'User-Agent': 'Mozilla/4.0 (compatible; MSIE 4.01; Windows 95)'})
>>> r.text
'flag{user_agents_undercover}\n<div style="text-align:center">\n<br><br><br><br>\n<b> NOT CHALLENGE RELATED:</b><br>THANK YOU to Digital Ocean for supporting NahamCon and NahamCon CTF!\n<p>\n<img width=600px src="https://d24wuq6o951i2g.cloudfront.net/img/events/id/457/457748121/assets/1b5a9739fd31b42fa4eb37ac6b3a6e1c.DOlogo.png">\n</p>\n</div>'

There, you got the flag.

flag{user_agents_undercover}