CVE-2015-1015 in CX-One CX-Programmer
Summary
by MITRE
Omron CX-One CX-Programmer before 9.6, CJ2M PLC devices before 2.1, and CJ2H PLC devices before 1.5 use a reversible format for password storage in object files on Compact Flash cards, which makes it easier for local users to obtain sensitive information by reading a file.
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Analysis
by VulDB Data Team • 03/01/2018
The vulnerability described in CVE-2015-1015 affects Omron CX-One software and specific CJ2M and CJ2H PLC devices, creating a significant security weakness in industrial control systems. This issue stems from the improper handling of password storage within object files stored on Compact Flash cards, which are commonly used in industrial automation environments. The vulnerability specifically impacts versions prior to 9.6 for CX-Programmer software and versions 2.1 and 1.5 respectively for CJ2M and CJ2H PLC devices, indicating a widespread problem across Omron's industrial control ecosystem.
The technical flaw involves the use of a reversible format for password storage, meaning that password encryption is not properly implemented or is using a weak encryption method that can be easily reversed. This reversible storage format allows local users who have access to the Compact Flash cards to simply read the object files and extract password information without requiring advanced cryptographic attacks or significant computational resources. The vulnerability directly violates security best practices for credential storage and represents a critical weakness in the authentication mechanisms of industrial control systems.
From an operational impact perspective, this vulnerability creates a serious risk for industrial environments where physical access controls may be insufficient or where unauthorized personnel might gain access to Compact Flash cards containing PLC object files. Local users with access to these storage devices can easily obtain sensitive information including passwords, which could lead to unauthorized access to industrial control systems, potential system compromise, and operational disruption. The vulnerability particularly affects environments where multiple users have physical access to industrial equipment and where proper segregation of duties is not maintained. This weakness enables attackers to escalate privileges and potentially gain full control over industrial processes, creating risks for operational technology environments that require robust security controls.
The vulnerability aligns with CWE-312 (Cleartext Storage of Sensitive Information) and represents a failure in proper credential management practices within industrial control systems. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and privilege escalation, specifically targeting the initial access phase where attackers seek to obtain valid credentials for system access. Organizations should implement immediate mitigations including updating to supported software versions, implementing strict physical access controls for Compact Flash cards, and conducting thorough security assessments of industrial control systems. Additionally, regular security training for personnel handling industrial equipment and implementation of proper access control policies are essential to prevent exploitation of this vulnerability. The issue highlights the critical importance of secure credential storage in industrial environments and demonstrates the need for comprehensive security measures beyond traditional cybersecurity approaches in operational technology settings.