CISA Advisory: Franklin Fueling Systems TS-550 EVO

View CSAF

1. EXECUTIVE SUMMARY

• CVSS v4 8.7
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Franklin Fueling Systems
• Equipment: TS-550 EVO Automatic Tank Gauge
• Vulnerability: Absolute Path Traversal

2. RISK EVALUATION

Successful exploitation of this vulnerability allow an attacker to gain administrative access over the affected device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Franklin Fueling Systems products are affected:

• TS-550 EVO: Versions prior to 2.26.4.8967

3.2 Vulnerability Overview

3.2.1 ABSOLUTE PATH TRAVERSAL CWE-36

Franklin Fueling Systems TS-550 EVO versions prior to 2.26.4.8967 possess a file that can be read arbitrarily that could allow an attacker obtain administrator credentials.

CVE-2024-8497 has been assigned to this vulnerability. A CVSS v3.1 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).

A CVSS v4 score has also been calculated for CVE-2024-8497. A base score of 8.7 has been calculated; the CVSS vector string is (CVSS4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Energy
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Pedro Umbelino of Bitsight reported this vulnerability to CISA.

4. MITIGATIONS

Franklin Fueling Systems recommends users update to 2.26.4.8967.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more 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 the 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 on 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.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

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.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• September 24, 2024: Initial Publication