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.

Comments
Should I Segment My IoT Devices Onto Their Own Networks?
Newest First  |  Oldest First  |  Threaded View
tdsan
tdsan,
User Rank: Ninja
8/20/2020 | 5:19:39 PM
I agree with the writer, but Sean Tufts (not so sure)
I'm not really concerned about that. With segmentation, I'm more concerned with the criticality and importance of the devices. --Sean Tuffs

 I am not sure if I agree with this reasoning, there is a thing called Zero-Trust especially for environments like hospitals, police stations, utility companies, and IT companies who should have these devices in an isolated environment or VLAN (VXLAN in some cases - VMware Centric). If configured properly, you only allow specific devices to communicate with those devices over a secured connection. I think IPv6 is good to secure devices like this (IoT Devices) because they add an additional layer to the network (IPv6 AES256 IPSec ESP/AH Tunnels). The writer stated that the user should have strong NAC (I agree) with tools to limit the execution of executables on the network so it limits ransomware and external threats and attacks.

 

evolution-of-smart-buildings-and-their-place-in-the-internet-of ...

 

This is an example but it gives the reader an idea of the various devices that could exist in any sort of environment. We need to start thinking of Zero-trust designs using locked down methods where baselines of servers and IoT devices are segmented with only a few devices to communicate with servers and/or telecom/network devices.

But think about this, if I can modify the settings on a PLC device, then I can change water temperature, heating/cooling, electrical regulation, so that means those devices need to be isolated because their security posture will not be as high as those in Zone 0 or 1.

The Purdue model for Industrial control systems - Industrial ...

 

So to me, it is not only about the importance of the device, but where the device is located in the IT ecosystem and its function. There needs to be a conversation so if there is any doubt in your mind, then you may need to fortify the design of the network with MFA/2FA, limit who has access to certain devices, if there is a need, put them on a VLAN where VLANs from the admin staff is part of the multi-connect VLAN or VXLAN, and finally, the vendor needs to be consulted to share with them any shortcomings you find (Continuous Diagnostic and Mitigation - CDM).

T

 

 


Edge-DRsplash-10-edge-articles
I Smell a RAT! New Cybersecurity Threats for the Crypto Industry
David Trepp, Partner, IT Assurance with accounting and advisory firm BPM LLP,  7/9/2021
News
Attacks on Kaseya Servers Led to Ransomware in Less Than 2 Hours
Robert Lemos, Contributing Writer,  7/7/2021
Commentary
It's in the Game (but It Shouldn't Be)
Tal Memran, Cybersecurity Expert, CYE,  7/9/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Practical Network Security Approaches for a Multicloud, Hybrid IT World
The report covers areas enterprises should focus on for their multicloud/hybrid cloud security strategy: -increase visibility over the environment -learning cloud-specific skills -relying on established security frameworks -re-architecting the network
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2022-30333
PUBLISHED: 2022-05-09
RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files during an extract (aka unpack) operation, as demonstrated by creating a ~/.ssh/authorized_keys file. NOTE: WinRAR and Android RAR are unaffected.
CVE-2022-23066
PUBLISHED: 2022-05-09
In Solana rBPF versions 0.2.26 and 0.2.27 are affected by Incorrect Calculation which is caused by improper implementation of sdiv instruction. This can lead to the wrong execution path, resulting in huge loss in specific cases. For example, the result of a sdiv instruction may decide whether to tra...
CVE-2022-28463
PUBLISHED: 2022-05-08
ImageMagick 7.1.0-27 is vulnerable to Buffer Overflow.
CVE-2022-28470
PUBLISHED: 2022-05-08
marcador package in PyPI 0.1 through 0.13 included a code-execution backdoor.
CVE-2022-1620
PUBLISHED: 2022-05-08
NULL Pointer Dereference in function vim_regexec_string at regexp.c:2729 in GitHub repository vim/vim prior to 8.2.4901. NULL Pointer Dereference in function vim_regexec_string at regexp.c:2729 allows attackers to cause a denial of service (application crash) via a crafted input.