Description
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M and later, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server DA/UA all versions allows a remote unauthenticated attacker to execute a malicious code by RPC with a path to a malicious library while connected to the products.
EPSS Score:
1%
Comprehensive Technical Analysis of EUVD-2023-59140
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description: The vulnerability in question is a "Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')" issue affecting multiple Mitsubishi Electric Corporation products. This vulnerability allows a remote unauthenticated attacker to execute malicious code via RPC (Remote Procedure Call) by specifying a path to a malicious library.
Severity Evaluation:
The CVSS (Common Vulnerability Scoring System) base score for this vulnerability is 9.8, which is classified as "Critical." The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
This high severity score underscores the critical nature of the vulnerability, which can lead to significant impacts on confidentiality, integrity, and availability.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Code Execution (RCE): An attacker can exploit this vulnerability to execute arbitrary code on the affected systems.
- RPC Manipulation: The attacker can manipulate RPC calls to load and execute malicious libraries.
Exploitation Methods:
- Network-Based Attacks: Since the attack vector is network-based, an attacker can exploit this vulnerability over the network without needing physical access to the device.
- Unauthenticated Access: The vulnerability does not require authentication, making it easier for attackers to exploit.
3. Affected Systems and Software Versions
The vulnerability affects the following Mitsubishi Electric Corporation products and versions:
- EZSocket: Versions 3.0 to 5.92
- GT Designer3 Version1 (GOT1000): Versions 1.325P and prior
- GT Designer3 Version1 (GOT2000): Versions 1.320J and prior
- GX Works2: Versions 1.11M and later
- GX Works3: Versions 1.106L and prior
- MELSOFT Navigator: Versions 1.04E to 2.102G
- MT Works2: Versions 1.190Y and prior
- MX Component: Versions 4.00A to 5.007H
- MX OPC Server DA/UA: All versions
4. Recommended Mitigation Strategies
Immediate Actions:
- Patch Management: Apply the latest patches and updates provided by Mitsubishi Electric Corporation.
- Network Segmentation: Isolate affected systems from the broader network to limit potential attack vectors.
- Access Controls: Implement strict access controls and authentication mechanisms to prevent unauthorized access.
Long-Term Strategies:
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
- Incident Response Planning: Develop and maintain an incident response plan to quickly address any potential exploitation.
- User Training: Educate users and administrators about the risks and best practices for securing industrial control systems.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European industrial control systems, particularly in sectors such as manufacturing, energy, and critical infrastructure. The potential for remote code execution without authentication can lead to severe disruptions, data breaches, and operational failures. This underscores the need for robust cybersecurity measures and continuous monitoring in industrial environments.
6. Technical Details for Security Professionals
Technical Overview:
- Unsafe Reflection: The vulnerability arises from the unsafe use of reflection, where externally-controlled input is used to select classes or code. This can lead to the execution of malicious code.
- RPC Mechanism: The RPC mechanism is exploited by specifying a path to a malicious library, which is then loaded and executed by the affected system.
Detection and Monitoring:
- Network Monitoring: Implement network monitoring tools to detect unusual RPC traffic and potential exploitation attempts.
- Log Analysis: Regularly analyze system logs for any signs of unauthorized access or unusual activity.
- Intrusion Detection Systems (IDS): Deploy IDS to identify and alert on suspicious network activities.
Mitigation Steps:
- Input Validation: Ensure that all externally-controlled inputs are properly validated and sanitized.
- Code Review: Conduct thorough code reviews to identify and remediate unsafe reflection practices.
- Security Hardening: Harden the security configurations of affected systems to minimize the attack surface.
References:
By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and ensure the security and integrity of their industrial control systems.