CVE-2018-17907 in CX-Supervisor
Summary
by MITRE
When processing project files in Omron CX-Supervisor Versions 3.4.1.0 and prior and tampering with the value of an offset, an attacker can force the application to read a value outside of an array.
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Analysis
by VulDB Data Team • 04/10/2020
This vulnerability exists in Omron CX-Supervisor software versions 3.4.1.0 and earlier, where improper input validation occurs during project file processing. The flaw manifests when an attacker manipulates the offset value within project files, causing the application to access memory locations beyond the intended array boundaries. This represents a classic buffer over-read condition that falls under the CWE-125 vulnerability category, specifically categorized as an out-of-bounds read error. The software fails to properly validate array indices before accessing memory locations, creating a scenario where arbitrary memory content can be read by malicious actors.
The technical implementation of this vulnerability allows attackers to manipulate project files and inject malicious offset values that bypass normal boundary checks. When the application processes these tampered files, it executes code paths that read beyond allocated memory regions, potentially exposing sensitive data, internal application structures, or system information. This type of vulnerability can be leveraged as an information disclosure vector, where attackers gain access to memory contents that should remain protected. The flaw directly impacts the software's memory management and input validation mechanisms, creating a pathway for data exfiltration and system reconnaissance.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a precursor to more sophisticated attacks. Attackers can use the leaked memory information to understand application internals, identify potential further vulnerabilities, or craft more targeted attacks against the system. This vulnerability particularly affects industrial control systems where Omron CX-Supervisor is deployed, creating risks for operational technology environments. The attack surface is limited to users who process project files with the affected software, but the potential for privilege escalation or lateral movement exists if attackers can influence the project file creation process.
Mitigation strategies should focus on implementing proper input validation and boundary checking mechanisms within the application. Software vendors should enforce strict array index validation before memory access operations, ensuring that all offset values fall within acceptable ranges. The recommended approach includes implementing bounds checking, using safe memory access functions, and conducting thorough input sanitization of project files. Additionally, users should be advised to avoid processing untrusted project files and to maintain updated versions of the software. This vulnerability aligns with ATT&CK technique T1059.005 for execution through application-specific flaws, and T1005 for data collection through information discovery methods. Regular security updates and vulnerability assessments should be implemented to prevent exploitation of similar memory safety issues in industrial control systems.