CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
56.5%
Successful exploitation of these vulnerabilities could result in unauthorized changes to device configuration, to include adding new users or changing existing passwords for persistent access to the device.
The following versions of Sequi PortBloque S, a serial Modbus firewall, are affected:
The affected product has improper authentication issues which may allow an attacker to bypass the authentication process and gain user-level access to the device.
CVE-2022-2662 has been assigned to this vulnerability. A CVSS v3 base score of 9.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).
The affected product has an improper authorization vulnerability, which may allow a low-privileged user to perform administrative functions using specifically crafted requests.
CVE-2022-2661 has been assigned to this vulnerability. A CVSS v3 base score of 9.9 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
Byron Chaney of Accenture Security reported these vulnerabilities to CISA.
As of August 9, 2022, Sequi has not responded to requests to work with CISA to mitigate these vulnerabilities. Users of this affected product should contact Sequi for additional information.
CISA will update this ICSA to reflect any patches, updates, or mitigation information Sequi provides in the future.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 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-12-146-01B–Targeted 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-2022-2661
cisa.gov/ics
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cwe.mitre.org/data/definitions/285.html
cwe.mitre.org/data/definitions/287.html
nvd.nist.gov/vuln/detail/CVE-2022-2662
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
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