CVE-2018-18986 in LAquis SCADA
Summary
by MITRE
LCDS Laquis SCADA prior to version 4.1.0.4150 allows the opening of a specially crafted report format file that may cause an out of bounds read, which may cause a system crash, allow data exfiltration, or remote code execution.
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Analysis
by VulDB Data Team • 07/06/2023
The vulnerability CVE-2018-18986 affects LCDS Laquis SCADA software versions prior to 4.1.0.4150, representing a critical security flaw that exploits improper input validation in the report format handling functionality. This vulnerability falls under the category of memory safety issues and specifically manifests as an out-of-bounds read condition that can be triggered through manipulation of specially crafted report format files. The affected system operates within industrial control environments where SCADA systems manage critical infrastructure operations, making this vulnerability particularly dangerous for operational technology environments. The flaw exists in the software's parsing mechanism for report files, which fails to properly validate the structure and boundaries of incoming data before processing.
The technical exploitation of this vulnerability occurs when the SCADA system attempts to process a maliciously crafted report file that contains malformed data structures designed to trigger memory access violations. An out-of-bounds read condition allows an attacker to access memory locations beyond the intended buffer boundaries, potentially exposing sensitive data or system information that should remain protected. This memory access violation can manifest in multiple ways including system crashes that disrupt operations, data exfiltration where sensitive operational data is extracted from memory, or in more severe cases, remote code execution that could allow full system compromise. The vulnerability is particularly concerning because it operates at the application level within the SCADA environment, potentially affecting critical infrastructure operations without requiring direct network access to the system.
The operational impact of CVE-2018-18986 extends beyond simple system instability into serious threats to industrial control system security and operational continuity. Organizations utilizing affected Laquis SCADA versions face potential disruption of critical processes, data integrity compromises, and increased risk of unauthorized access to operational technology environments. The vulnerability's potential for remote code execution means that attackers could gain complete control over affected systems, potentially leading to widespread operational disruption or even physical safety hazards in environments where SCADA systems control industrial processes. This vulnerability directly impacts the integrity and availability of industrial control systems, making it a significant concern for critical infrastructure operators. The attack surface is expanded by the fact that report files are often used for legitimate system operations and may be received from external sources or generated by various system components, increasing the potential attack vectors.
Mitigation strategies for CVE-2018-18986 primarily focus on immediate software updates and system hardening measures. Organizations should prioritize upgrading to LCDS Laquis SCADA version 4.1.0.4150 or later, which contains the necessary patches to address the out-of-bounds read vulnerability. Additionally, implementing network segmentation and access controls can limit potential attack vectors by restricting unauthorized access to SCADA systems. Input validation and sanitization measures should be enhanced to prevent malformed report files from being processed, while regular security monitoring and intrusion detection systems can help identify potential exploitation attempts. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and may also map to ATT&CK techniques related to privilege escalation and execution through application input validation flaws. Organizations should also consider implementing zero-trust security models for their industrial control systems, ensuring that all system components are verified and authenticated before processing any input data, particularly in environments where SCADA systems manage critical infrastructure operations.