CVE-2018-18994 in LAquis SCADA
Summary
by MITRE
LCDS Laquis SCADA prior to version 4.1.0.4150 allows an out of bounds read when opening a specially crafted project file, which may cause a system crash or allow data exfiltration.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/08/2023
The vulnerability CVE-2018-18994 represents a critical out-of-bounds read flaw in LCDS Laquis SCADA software versions prior to 4.1.0.4150. This vulnerability stems from inadequate input validation during the processing of project files, specifically when the software attempts to parse malformed or maliciously crafted file structures. The issue manifests when the application encounters project files containing crafted data sequences that exceed expected buffer boundaries during file parsing operations. Such out-of-bounds read conditions typically occur when software attempts to access memory locations beyond the allocated buffer space, often due to missing bounds checking mechanisms or improper handling of variable-length data structures within the project file format. The vulnerability is particularly concerning in industrial control system environments where SCADA platforms serve as critical infrastructure components for monitoring and controlling industrial processes.
The technical exploitation of this vulnerability involves crafting a specially designed project file that triggers the out-of-bounds read condition when opened by the vulnerable SCADA software. When the application processes this malicious file, it attempts to read memory locations beyond the intended buffer boundaries, potentially causing the application to crash or behave unpredictably. In some cases, this memory access violation may expose sensitive data from adjacent memory regions, enabling potential data exfiltration. The out-of-bounds read can result in system instability, application termination, or in more sophisticated attack scenarios, may provide attackers with information that could be leveraged for further exploitation. This type of vulnerability falls under the CWE-125 weakness category, which specifically addresses out-of-bounds read conditions in software implementations.
The operational impact of CVE-2018-18994 extends beyond simple application instability, particularly within industrial environments where SCADA systems control critical infrastructure operations. System crashes resulting from this vulnerability could lead to operational disruptions in manufacturing processes, power generation, water treatment facilities, or other industrial control systems where continuous operation is essential. The potential for data exfiltration poses additional security risks, as attackers could potentially extract sensitive operational data, configuration information, or process parameters that could be used for targeted attacks against the industrial control systems. Organizations relying on LCDS Laquis SCADA platforms face significant operational risks, including potential downtime, process interruption, and compromised system integrity. The vulnerability's impact is amplified in environments where SCADA systems are connected to operational technology networks without proper network segmentation or security controls.
Mitigation strategies for CVE-2018-18994 should prioritize immediate software updates to version 4.1.0.4150 or later, which contains the necessary patches to address the out-of-bounds read vulnerability. Organizations should implement strict file validation procedures for all project files imported into the SCADA environment, including automated scanning for potentially malicious content and maintaining comprehensive file integrity checks. Network segmentation and access controls should be enhanced to limit unauthorized access to SCADA systems and prevent lateral movement in case of compromise. The vulnerability's characteristics align with ATT&CK technique T1059.005, which involves the use of scripting languages for system manipulation, though the specific exploitation pathway requires careful file handling and parsing validation. Regular security assessments of industrial control systems should include vulnerability scanning for similar out-of-bounds read conditions, and incident response procedures should be established to address potential exploitation attempts. Additionally, maintaining detailed audit logs of project file access and modifications can aid in detecting unauthorized or malicious file operations within the SCADA environment.