Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

IoT/Embedded Security

7/23/2018
08:05 AM
Larry Loeb
Larry Loeb
Larry Loeb
50%
50%

DNS Rebinding Attack Could Affect Half a Billion IoT Devices

From smart speakers to printers to IP-connected video equipment, DNS rebinding attacks are targeting a number of IoT-based devices.

DNS rebinding, one of the oldest forms of online attacks, have been undergoing a renaissance lately.

At the most fundamental level, the attack confuses a device connected to the Internet as to where it should look for information. It also can make the device think the request for information is coming from a trusted internal network, rather than an external one.

The Armis Security research team reports that it has found that enterprises are very exposed to DNS rebinding attacks. The researchers write that that this is happening because the majority of manufacturers who make commonly used Internet of Things (IoT) devices within enterprise environments ship devices that are vulnerable to it. (See Google, Roku, Sonus Rush Out Patches for DNS Vulnerability.)

Using data from their Device Knowledgebase, which includes over 5 million device behavior profiles, researchers identified the devices, manufacturers and estimated number of vulnerable devices worldwide in the enterprise -- nearly half a billion devices by their count.

In their research, the team took a wider look at the kinds of devices that can be fooled by this sort of attack -- not just the usual routers. What they found includes:

  • IP phones, specifically IP-based desk phones
  • Printers
  • Network equipment, including access point, routers or switches
  • IP cameras: mainly security cameras
  • Steaming media players, including Chromecast, FireTV, Apple TV
  • Video conferencing, including IP-based conference room phones and speakers
  • Smart TVs
  • HVAC controls, including smart thermostats
  • Peripherals
  • Point of Sale machines
  • Smart speakers, including Amazon Echo, Google Home and Sonos

This is a really wide net that researchers cast to come up with their estimates.

But there are some devices in there that do not usually get security attention.

Printers, for example. About a third of the devices in their total are printers without security agents onboard. This is about 66% of all printers. They are usually network connected, and ubiquitous enough in the enterprise to not call attention to themselves. Yet, they can be perfectly situated in a network to be stepping stones for further attacks. To make matters worse, they are usually deployed with default settings enabled which makes them low-hanging fruit for an attacker.

IP phones also fall into this category. They are ubiquitous devices that are not well protected by default. Cisco had to patch its VoIP line of phones to stop a vulnerability that could allow a remote attacker to perform a command injection and execute commands with the privileges of the web server.

Unsurprisingly, Armis thinks that security products and tools that they sell would be just the ticket to combat this problem.

But there are other methods that can be used. One would be to find those devices that belong to different network segments so they can't be discovered or compromised using a DNS rebinding attack.

Also, disabling services that are not needed -- such as Universal Plug and Play (UPnP) -- helps a lot. Of course, old standbys like changing the password to each device's HTTPS server and updating device software whenever possible are always beneficial.

Armis researchers make a good point when they show that vulnerable IoT devices are all over the organization. Defending them is a practical necessity.

Related posts:

— Larry Loeb has written for many of the last century's major "dead tree" computer magazines, having been, among other things, a consulting editor for BYTE magazine and senior editor for the launch of WebWeek.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 10/23/2020
7 Tips for Choosing Security Metrics That Matter
Ericka Chickowski, Contributing Writer,  10/19/2020
Russian Military Officers Unmasked, Indicted for High-Profile Cyberattack Campaigns
Kelly Jackson Higgins, Executive Editor at Dark Reading,  10/19/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-24847
PUBLISHED: 2020-10-23
A Cross-Site Request Forgery (CSRF) vulnerability is identified in FruityWifi through 2.4. Due to a lack of CSRF protection in page_config_adv.php, an unauthenticated attacker can lure the victim to visit his website by social engineering or another attack vector. Due to this issue, an unauthenticat...
CVE-2020-24848
PUBLISHED: 2020-10-23
FruityWifi through 2.4 has an unsafe Sudo configuration [(ALL : ALL) NOPASSWD: ALL]. This allows an attacker to perform a system-level (root) local privilege escalation, allowing an attacker to gain complete persistent access to the local system.
CVE-2020-5990
PUBLISHED: 2020-10-23
NVIDIA GeForce Experience, all versions prior to 3.20.5.70, contains a vulnerability in the ShadowPlay component which may lead to local privilege escalation, code execution, denial of service or information disclosure.
CVE-2020-25483
PUBLISHED: 2020-10-23
An arbitrary command execution vulnerability exists in the fopen() function of file writes of UCMS v1.4.8, where an attacker can gain access to the server.
CVE-2020-5977
PUBLISHED: 2020-10-23
NVIDIA GeForce Experience, all versions prior to 3.20.5.70, contains a vulnerability in NVIDIA Web Helper NodeJS Web Server in which an uncontrolled search path is used to load a node module, which may lead to code execution, denial of service, escalation of privileges, and information disclosure.