CVE-2020-5666 Explained : Impact and Mitigation
Learn about CVE-2020-5666, a vulnerability in MELSEC iQ-R Series CPU Modules that could lead to a denial-of-service condition. Find out the impacted systems, exploitation method, and mitigation steps.
A vulnerability in MELSEC iQ-R Series CPU Modules could allow a remote attacker to trigger a denial-of-service condition by sending a specially crafted HTTP packet.
Understanding CVE-2020-5666
This CVE involves uncontrolled resource consumption in specific firmware versions of MELSEC iQ-R Series CPU Modules.
What is CVE-2020-5666?
The vulnerability in MELSEC iQ-R Series CPU Modules allows a remote attacker to disrupt the CPU unit's operation through a malicious HTTP packet, potentially leading to a denial-of-service situation.
The Impact of CVE-2020-5666
Exploitation of this vulnerability could result in a denial-of-service condition, affecting the execution of programs and communication within the system.
Technical Details of CVE-2020-5666
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability lies in the uncontrolled resource consumption within specific firmware versions of MELSEC iQ-R Series CPU Modules.
Affected Systems and Versions
- Product: MELSEC iQ-R Series CPU Modules
- Vendor: Mitsubishi Electric Corporation
- Affected Versions: R00/01/02CPU Firmware versions from '05' to '19' and R04/08/16/32/120(EN)CPU Firmware versions from '35' to '51'
Exploitation Mechanism
The vulnerability can be exploited by a remote attacker sending a specially crafted HTTP packet to the CPU unit, causing errors and potentially leading to a denial-of-service condition.
Mitigation and Prevention
Protecting systems from CVE-2020-5666 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches provided by Mitsubishi Electric Corporation to address the vulnerability.
- Monitor network traffic for any suspicious activity targeting the affected systems.
Long-Term Security Practices
- Regularly update firmware and software to the latest versions to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories from Mitsubishi Electric Corporation and apply patches promptly to secure the systems.