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Friday, 25 March 2022 10:31

Expert slams US Govt agencies over mitigation advice for ICS Featured

Robert M. Lee: "Lots of great info but please don’t follow their mitigation advice for ICS.." Robert M. Lee: "Lots of great info but please don’t follow their mitigation advice for ICS.." Courtesy Dragos

Steps to mitigate attacks against industrial control systems, outlined by three US Government entities — the Cybersecurity and Infrastructure Security Agency, the FBI and the Department of Energy — have come in for some sharp criticism from Robert M. Lee, the chief executive of Dragos, a company that specialises in security for such systems.

The three US agencies issued their advice along with details from the indictments of four Russian Government officials, who are alleged to have been involved in intrusions in energy systems around the globe, including attacking systems in the Middle East using malware known as Triton.

Lee, an ex-NSA hacker, welcomed the fact that the three agencies were providing additional information about the Russian operators. "Lots of great info but please don’t follow their mitigation advice for ICS. It’s not practical and, in some cases, dangerous," he said in a thread on Twitter.

To illustrate what he had said, Lee sited the advice that under ICS best practices the three government agencies had claimed that all software should be updated. "This will literally bring down most environments, may void certain OEM warranties, and will absolutely rightfully piss off all your operations staff," he pointed out. "It also is irrelevant to the attacks that were highlighted."

Again, there was advice to harden field devices such as smartphones and tablets. To this, Lee said: "I’m not sure how those are field devices in an ICS context but please don’t have smart phones and tablets in your ICS."

He also noted that there was a recommendation to configure encryption for ICS protocols. "This would cause operational outages and issues in most cases and, in most cases, isn’t even possible anyway. Also, [it is] not at all related to any of the attack scenarios discussed and reduces zero risk," was his comment.

"...It says don’t let vendors connect their devices to the ICS. It sounds good, but ignores the reality of industrial operations, maintenance, etc. completely infeasible," Lee added.

" says to not allow transient devices. Similar to the above, this just isn’t practical in reality with OEMs/maintenance personnel/integrators/etc."

Another bit of advice doled out by the three agencies was to replace all out-of-date hardware and software.

Lee said this was nearly impossible and "would be an overly burdensome financial lift for a company that would not have reduced any of the risk in the highlighted attacks".

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Sam Varghese

Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

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