8.1 High
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
20.4%
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 identifies baseline mitigations for reducing risks from these and other cybersecurity attacks.
Successful exploitation of these vulnerabilities could allow for configuration manipulation.
The following versions of Saia Burgess PG5 PCD, a PLC, are affected:
The affected product uses the S-Bus protocol with authentication functions that can be controlled by the client MAC and IP. Because UDP is stateless, an attacker that can observe traffic can also spoof the MAC and IP of an authenticated client and manipulate the controller configuration.
CVE-2022-30319 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L).
The affected product uses the S-Bus βwrite byteβ message to a specific address and supplies a hashed version of the password. The hashing algorithm is based on CRC-16 and, as such, is not cryptographically secure.
CVE-2022-30320 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L).
Daniel dos Santos and Jos Wetzels from Forescout Technologies reported these vulnerabilities to CISA.
Honeywell recommends users with affected products and unsupported products take the following steps to protect themselves:
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 CISA products detailing cyber defense best 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 suspected malicious activity should follow established internal procedures and report 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-2022-30319
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-30320
cisa.gov/ics
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cwe.mitre.org/data/definitions/288.html
cwe.mitre.org/data/definitions/327.html
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sbc-support.com/en/product-index/
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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