CVE-2020-5668 : Security Advisory and Response
Learn about CVE-2020-5668, a vulnerability in MELSEC iQ-R Series modules allowing remote attackers to cause denial-of-service conditions. Find mitigation steps and preventive measures here.
A vulnerability in MELSEC iQ-R Series modules could allow a remote attacker to cause a denial-of-service condition.
Understanding CVE-2020-5668
This CVE involves uncontrolled resource consumption in specific firmware versions of MELSEC iQ-R Series modules, potentially leading to a denial-of-service (DoS) attack.
What is CVE-2020-5668?
The vulnerability in MELSEC iQ-R Series modules allows a remote unauthenticated attacker to disrupt the CPU unit's operation, leading to a DoS condition in program execution and communication.
The Impact of CVE-2020-5668
The exploitation of this vulnerability can result in a denial-of-service condition affecting program execution and communication via the affected unit.
Technical Details of CVE-2020-5668
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules can be exploited by a remote attacker to disrupt the CPU unit's operation, causing a DoS condition.
Affected Systems and Versions
- Product: MELSEC iQ-R
- Vendor: Mitsubishi Electric Corporation
- Affected Versions: R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, and more.
Exploitation Mechanism
The vulnerability can be exploited by sending a specially crafted SLMP packet to the affected unit, triggering the uncontrolled resource consumption.
Mitigation and Prevention
Protecting systems from CVE-2020-5668 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches provided by Mitsubishi Electric Corporation promptly.
- Implement network segmentation to limit exposure to potential attackers.
- Monitor network traffic for any suspicious activities.
Long-Term Security Practices
- Regularly update firmware and software to mitigate known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address weaknesses.
Patching and Updates
- Stay informed about security advisories from Mitsubishi Electric Corporation.
- Follow best practices for securely configuring and maintaining industrial control systems.