1. EXECUTIVE SUMMARY
-
CVSS v3 7.8
- ATTENTION: Low skill level to exploit
- Vendor: LCDS—Leão Consultoria e Desenvolvimento de Sistemas LTDA ME
- Equipment: LAquis SCADA
- Vulnerability: Out-of-Bounds Write
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following version of LAquis SCADA, an industrial automation software, is affected:
- SCADA 4.1.0.4150
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
Opening specially crafted ELS file may result in a write past the end of an allocated buffer, which may allow an attacker to execute remote code in the context of the current process.
CVE-2019-6536 has been assigned to this vulnerability. A CVSS v3 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).
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
Mat Powell, working with Zero Day Initiative, reported this vulnerability to NCCIC.
4. MITIGATIONS
LCDS recommends users update to Version 4.3.1.71, which can be found at the following location:
NCCIC recommends that users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open unsolicited attachments in 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.
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended 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-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
This vulnerability is exploitable locally. No known public exploits specifically target this vulnerability.
Source:
https://ics-cert.us-cert.gov/advisories/ICSA-19-073-01