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ICS vulnerabilities on the rise as gaps in remote work expand attack surfaces

By Shannon Williams
Tue 9 Feb 2021
FYI, this story is more than a year old

Throughout the second half of 2020, 71% of industrial control system (ICS) vulnerabilities disclosed were remotely exploitable through network attack vectors, according to the second Biannual ICS Risk & Vulnerability Report released by Claroty.

The report also revealed a 25% increase in ICS vulnerabilities disclosed compared to 2019, as well as a 33% increase from 1H 2020.

During 2H 2020, 449 vulnerabilities affecting ICS products from 59 vendors were disclosed. Of those, 70% were assigned high or critical Common Vulnerability Scoring System (CVSS) scores, and 76% do not require authentication for exploitation.

"The accelerated convergence of IT and OT networks due to digital transformation enhances the efficiency of ICS processes, but also increases the attack surface available to adversaries," says Amir Preminger, vice president of research at Claroty. 

"Nation-state actors are clearly looking at many aspects of the network perimeter to exploit, and cybercriminals are also focusing specifically on ICS processes, which emphasises the need for security technologies such as network-based detection and secure remote access in industrial environments," he says.

"It is heartening to see a growing interest in ICS within the security research community, as we must shine a brighter light on these vulnerabilities in order to keep threats at arms length."

Vulnerabilities on the rise in critical manufacturing, energy, and water & wastewater sectors

The critical manufacturing, energy, water and wastewater, and commercial facilities sectors - all designated as critical infrastructure sectors - were by far the most impacted by vulnerabilities disclosed during 2H 2020 and shows increases from the previous two years across the board:

  • Critical manufacturing increased 15% from 2H 2019 and 66% from 2H 2018
  • Energy increased 8% from 2H 2019 and 74% from 2H 2018
  • Water and wastewater increased 54% from 2H 2019 and 63% from 2H 2018
  • Commercial facilities increased 14% from 2H 2019 and 140% from 2H 2018
  • Assessment of ICS vulnerabilities sees growth in third-party researchers

The number of ICS vulnerabilities disclosed in 2020 increased by more than 30% compared to 2018 and nearly 25% compared to 2019, the report found.

According to Claroty, two factors contribute to this spike in recent years: a heightened awareness of the risks posed by ICS vulnerabilities, and researchers and vendors increasingly focused on identifying and remediating security flaws as effectively and efficiently as possible. This growth indicates security research focused on ICS products maturing.

Third-party researchers were responsible for 61% of discoveries, many of which were cybersecurity companies. This signals a change in focus to include ICS alongside IT security research, further evidence of the accelerated convergence between IT and OT. Among all third-party discoveries, 22 reported their first disclosures, a positive sign of growth in the ICS vulnerability research market.

The Claroty Research Team discovered and disclosed 41 vulnerabilities during the 2H 2020, affecting 14 vendors. These represent the direction and core objectives of the teams research focus. Overall, Claroty researchers have found and disclosed more than 70 ICS vulnerabilities to date.

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