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.

Attacks/Breaches

11/7/2018
02:30 PM
Satish Gannu
Satish Gannu
Commentary
Connect Directly
Twitter
LinkedIn
RSS
E-Mail vvv
50%
50%

IT-to-OT Solutions That Can Bolster Security in the IIoT

Industrial companies can use the hard-won, long-fought lessons of IT to leapfrog to an advanced state of Industrial Internet of Things security.

First of a two-part series.

The Industrial Internet of Things (IIoT) — within companies and across the entire global IIoT ecosystem — is an intricately intertwined and negotiated merger of information technology (IT) and operational technology (OT). OT systems are not only business-critical, they can be nation-critical or life-and-death-critical. Unfortunately,  the convergence of IT and OT has created uncertainty within companies about the ownership and operation of OT security solutions, as have many disruptive evolutions. The result: an alarming 59% of companies are willing to "tolerate medium-to-high risk in relation to IoT security," according to Forrester. This is dangerously wrong.

As someone with experience on both sides of the IT/OT equation, I've realized how industrial companies can use the hard-won, long-fought lessons of IT to leapfrog to an advanced state of IIoT security — architected and deployed to meet OT's differentiated requirements. If one thinks of OT systems as another form of data center — the heavily protected core of enterprise IT — there are some promising ideas one can adapt from decades of IT experience to provide new levels of IIoT security while honoring the specific needs of OT. Here are three examples.

Separation of Endpoint Networks
IT has learned the security advantage of separating endpoint networks of PCs and mobile devices from the core data center. As people carry their company laptops around, they can get hooked on the addictive drug known as free Wi-Fi — connection anywhere. It's free, but dangerous. Those endpoints can easily become compromised.

So, IT has developed "border crossings" that separate endpoint networks from the data center until PCs and laptops pass rigorous vetting. Not just usernames, passwords, and authentication codes but complete border-crossing-style background checks: Where has that machine been? What has it been doing? What software is loaded on it? Has the machine been compromised by travel to countries known for cyber espionage? Levels of access to the data center are provided in keeping with the results of a machine's background check.

The number of users, and therefore endpoint machines, is smaller in OT than in IT, but the same separation, vetting, and "border crossing" background checks can be used to strengthen OT security, and thus the security of the entire IIoT enterprise.

Microsegmentation
Data centers are comprised of multiple machines. Traditionally, when users access the data center via one machine, they can access all machines. But in most cases, there's no need for a free-for-all in which every user can access every machine. Via microsegmentation, security officers study the interrelationship of machines to determine which machines must talk to which other machines, and they restrict access to necessary connections only. This materially reduces vulnerability and potential damage.

Much as we'd like to, it's impossible for anyone to guarantee 100% fail-safe IIoT security. Therefore, we harden what we can, and reduce attack surfaces to the bare minimum. By dividing networks into physically independent microsegments, we build security walls within security walls — on the assumption that bad guys will be able to get through one or two but not all of them. 

The good news in porting microsegmentation from IT to OT is that OT is in many ways a simpler world. Where IT is comprised of fluid technology stacks with multiple moving parts dedicated to the three-dimensional flow of data, OT systems are engineered primarily to optimize processes: things happen the same way all the time to produce a specific output from a specific input. Modularity and mass customization are making OT more like IT every day, but for now it's safe to say that OT systems are simpler, making mirosegmentation easier to initiate and operate.

As the number of potentially lethal anti-IIoT malware variants increases, we need to develop and install as many trigger monitors as possible. Separation of endpoint networks and micro-segmentation could be valuable security additions to the OT half of the world's industrial economy. 

Read Part Two: User Behavior Analytics Could Find a Home in the OT World of the IIo

Related Content:

 

Black Hat Europe returns to London Dec. 3-6, 2018, with hands-on technical Trainings, cutting-edge Briefings, Arsenal open-source tool demonstrations, top-tier security solutions, and service providers in the Business Hall. Click for information on the conference and to register.

Satish joined San Jose-based ABB in February 2017 as chief security officer and Group VP, architecture and analytics, ABB Ability™, responsible for the security of all products, services and cybersecurity services. Satish brings to this position a background in computer ... View Full Bio
Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: Our Endpoint Protection system is a little outdated... 
Current Issue
The Year in Security: 2019
This Tech Digest provides a wrap up and overview of the year's top cybersecurity news stories. It was a year of new twists on old threats, with fears of another WannaCry-type worm and of a possible botnet army of Wi-Fi routers. But 2019 also underscored the risk of firmware and trusted security tools harboring dangerous holes that cybercriminals and nation-state hackers could readily abuse. Read more.
Flash Poll
Rethinking Enterprise Data Defense
Rethinking Enterprise Data Defense
Frustrated with recurring intrusions and breaches, cybersecurity professionals are questioning some of the industrys conventional wisdom. Heres a look at what theyre thinking about.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-16246
PUBLISHED: 2019-12-12
Intesync Solismed 3.3sp1 allows Local File Inclusion (LFI), a different vulnerability than CVE-2019-15931. This leads to unauthenticated code execution.
CVE-2019-17358
PUBLISHED: 2019-12-12
Cacti through 1.2.7 is affected by multiple instances of lib/functions.php unsafe deserialization of user-controlled data to populate arrays. An authenticated attacker could use this to influence object data values and control actions taken by Cacti or potentially cause memory corruption in the PHP ...
CVE-2019-17428
PUBLISHED: 2019-12-12
An issue was discovered in Intesync Solismed 3.3sp1. An flaw in the encryption implementation exists, allowing for all encrypted data stored within the database to be decrypted.
CVE-2019-18345
PUBLISHED: 2019-12-12
A reflected XSS issue was discovered in DAViCal through 1.1.8. It echoes the action parameter without encoding. If a user visits an attacker-supplied link, the attacker can view all data the attacked user can view, as well as perform all actions in the name of the user. If the user is an administrat...
CVE-2019-19198
PUBLISHED: 2019-12-12
The Scoutnet Kalender plugin 1.1.0 for WordPress allows XSS.