9.8 High
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
0.001 Low
EPSS
Percentile
49.0%
This updated advisory is a follow-up to the original advisory titled ICSA-23-026-02 Econolite EOS that was published January 26, 2023.
Successful exploitation of these vulnerabilities could result in a remote unauthenticated attacker gaining full control over traffic lights.
The following versions of EOS, a traffic control software, are affected:
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4.2.1 IMPROPER ACCESS CONTROL CWE-284
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Econolite EOS versions prior to 3.2.23 lack a password requirement for gaining βREADONLYβ access to log files and certain database and configuration files. One such file contains tables with MD5 hashes and usernames for all defined users in the control software, including administrators and technicians.
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CVE-2023-0451 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
4.2.2 USE OF WEAK HASH CWE-328
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Econolite EOS versions prior to 3.2.23 use a weak hash algorithm for encrypting privileged user credentials. A configuration file that is accessible without authentication uses MD5 hashes for encrypting credentials, including those of administrators and technicians.
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CVE-2023-0452 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Rustam Amin reported these vulnerabilities to CISA.
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Econolite recommends users update their affected products to the latest version. Customers are strongly encouraged to download the latest software updates through https://www.econolite.com/support.
Customers may also contact Econolite by sending an email to [email protected] or calling the Support line at (800) 225-6480 or reaching out to their local Account Manager or Distributor.
Econolite also recommends that customers follow best practices for network security and access control for all safety-critical equipment and minimize exposure by restricting access to equipment on the open public internet.
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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-12-146-01BβTargeted 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-2023-0451
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-0452
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/328.html
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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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