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1. EXECUTIVE SUMMARY

CVSS v4 8.5
ATTENTION: Low attack complexity
Vendor: LCDS – Leão Consultoria e Desenvolvimento de Sistemas Ltda ME
Equipment: LAquis SCADA
Vulnerabilities: Path Traversal

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to read and write files outside of their own directory.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of LAquis SCADA, an HMI program, are affected:

LAquis SCADA: Versions 4.7.1.7 and prior

3.2 Vulnerability Overview

3.2.1 Path Traversal CWE-22

There are multiple ways in LAquis SCADA for an attacker to access locations outside of their own directory.

CVE-2024-5040 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2024-5040. A base score of 8.5 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Chemical, Commercial Facilities, Energy, Food and Agriculture, Transportation Systems, Water and Wastewater Systems
COUNTRIES/AREAS DEPLOYED: South America
COMPANY HEADQUARTERS LOCATION: Brazil

3.4 RESEARCHER

Natnael Samson working with Trend Micro Zero Day Initiative reported these vulnerabilities to CISA.

4. MITIGATIONS

LCDS recommends users update to version 4.7.1.371 or newer of LAquis SCADA. which has been configured to resolve the reported path traversal issues.

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

Ensure that principles of least privilege are followed.
Restrict physical access to critical systems.

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:

Do not click web links or open attachments in unsolicited email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.

5. UPDATE HISTORY

May 21, 2024: Initial Publication