CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
62.1%
CISA is aware of a public report, known as βOT:ICEFALLβ that details vulnerabilities found in multiple operational technology (OT) vendors. CISA is issuing this advisory to provide notice of the reported vulnerabilities and identify baseline mitigations for reducing risks to these and other cybersecurity attacks.
Successful exploitation of these vulnerabilities could cause a denial-of-service condition and allow remote code execution.
The following versions of the Omron SYSMAC CS/CJ/CP Series and NJ/NX Series, a programmable logic controller, are affected:
Omron SYSMAC CS1/CJ1/CP1/CP2 series is vulnerable to a password used to restrict engineering operation is transmitted in plaintext.
CVE-2022-31204 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).
The CP1W-CIF41 Ethernet Option Board is vulnerable to a Web UI password that can be read from memory using the Omron FINS protocol. An attacker obtaining this password could change the network settings of the option board.
CVE-2022-31205 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).
The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to manipulate transmitted object code to an unprotected PLC without using the PLC protection password. An attacker could then execute arbitrary object code commands on the defined software logic for all versions of SYSMAC CS/CJ/CP series controllers and cause a denial-of-service condition.
CVE-2022-31207 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H).
The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to manipulate transmitted object code to the PLC and execute arbitrary machine code on the processor of the PLCβs CPU module for SYSMAC NJ/NX series controllers.
CVE-2022-31206 has been assigned to this vulnerability. A CVSS v3 base score of 4.4 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N).
Daniel dos Santos and Jos Wetzels from Forescout Technologies reported these vulnerabilities to CISA.
For CVE-2022-31204: Omron recommends users implement an extended password protection function in the following product versions:
For CVE-2022-31206: Omron intends to publish an update for SYSMAC NJ/NX in July 2022.
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
For CVE-2022-31205: Omron recommends using different passwords between the CP1W-CIF41 Ethernet Option Board and CP1 PLC itself. The Web UI password will not grant access to the PLC.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-31204
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