Tags: web 

Rating: 0

# Browser Bias (150)

### This Chall it's simple.

### I'm use burpsuite in all Challs, i recommend this for you.

### Intercept the page with Burp and send to Repeater, u get this.

GET / HTTP/1.1
Host: challenges.neverlanctf.com:1130
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: es-AR,es;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: close
Upgrade-Insecure-Requests: 1

### Send and receive this.

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Date: Wed, 12 Feb 2020 16:35:00 GMT
Server: nginx
X-Powered-By: PHP/7.2.10
Content-Length: 183
Connection: Close

<html>
<head>
<title>Browser Bias</title>
</head>
<body>
Sorry, this site is only optimized for browsers that run on commodo 64</body>
</html>

### For solve this chall, u need add a User-Agent ("Contiki/1.0 (Commodore 64; http://dunkels.com/adam/contiki/)") like as

GET / HTTP/1.1
Host: challenges.neverlanctf.com:1130
User-Agent: "Contiki/1.0 (Commodore 64; http://dunkels.com/adam/contiki/)" Firefox/73.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: es-AR,es;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: close
Upgrade-Insecure-Requests: 1

### And Get this

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Date: Wed, 12 Feb 2020 16:49:25 GMT
Server: nginx
X-Powered-By: PHP/7.2.10
Content-Length: 152
Connection: Close

<html>
<head>
<title>Browser Bias</title>
</head>
<body>
Welcome fellow c64 user. flag{8b1t_w3b}</body>
</html>

### Chall Solved :)