CVE-2021-20594 : Exploit Details and Defense Strategies
Understand the impact, technical details, and mitigation strategies for CVE-2021-20594 affecting Mitsubishi Electric MELSEC iQ-R series modules. Take immediate steps to secure your systems.
A detailed overview of CVE-2021-20594 highlighting the vulnerability, impact, technical details, and mitigation strategies.
Understanding CVE-2021-20594
An analysis of the Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules.
What is CVE-2021-20594?
The CVE-2021-20594 vulnerability in Mitsubishi Electric MELSEC iQ-R series exposes sensitive information to unauthorized actors, allowing remote attackers to obtain user names via brute-force attacks.
The Impact of CVE-2021-20594
The impact of this vulnerability is significant as it compromises the confidentiality of user data stored in the affected Mitsubishi Electric modules, posing a risk of unauthorized access and potential data breaches.
Technical Details of CVE-2021-20594
Exploring the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability resides in the firmware of Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU versions "26" and earlier, and SIL2 Process CPU modules R08/16/32/120PSFCPU all versions, enabling the acquisition of legitimate user names through unauthorized access.
Affected Systems and Versions
The vulnerability affects Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and earlier, and SIL2 Process CPU modules R08/16/32/120PSFCPU all versions.
Exploitation Mechanism
Remote unauthenticated attackers can exploit this vulnerability through brute-force attacks on user names, leading to the exposure of sensitive user information.
Mitigation and Prevention
Guidelines for immediate actions and long-term security practices to mitigate the risk posed by CVE-2021-20594.
Immediate Steps to Take
Immediately update the affected Mitsubishi Electric modules to the latest firmware version and restrict network access to mitigate potential unauthorized access.
Long-Term Security Practices
Implement strong authentication measures, regularly monitor for unauthorized access attempts, and conduct security assessments to identify and address vulnerabilities in the system.
Patching and Updates
Stay informed about security advisories released by Mitsubishi Electric, apply security patches promptly, and follow best practices to ensure the security of the systems.