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AUSCERT External Security Bulletin Redistribution
ESB-2023.0507
Advisory (icsa-23-026-02) Econolite EOS
27 January 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Econolite EOS
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: None
CVE Names: CVE-2023-0452 CVE-2023-0451
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-23-026-02
Comment: CVSS (Max): 9.8 CVE-2023-0452 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-23-026-02)
Econolite EOS
Original release date: January 26, 2023
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Econolite
o Equipment: EOS
o Vulnerability: Improper Access Control, Use of Weak Hash
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could result in a remote
unauthenticated attacker gaining full control over traffic control functions
performed by Econolite hardware.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of EOS, the traffic control software that controls all
Econolite traffic hardware, are affected:
o EOS: All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER ACCESS CONTROL CWE-284
The affected product lacks a password requirement for gaining "READONLY" access
to log files, as well as certain database and configuration files. One such
file contains tables with message-digest algorithm 5 (MD5) hashes and usernames
for all defined users in the control software, including administrators and
technicians.
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 ).
3.2.2 USE OF WEAK HASH CWE-328
The affected product uses 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.
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 ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Transportation
o COUNTRIES/AREAS DEPLOYED: United States and Canada
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Rustam Amin reported these vulnerabilities to CISA.
4. MITIGATIONS
Econolite did not respond to CISA's requests to coordinate. Users should
contact Econolite for further information on mitigating these vulnerabilities.
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
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.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
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