CVE-2021-27424 : Exploit Details and Defense Strategies
Discover the impact and mitigation steps for CVE-2021-27424, a vulnerability exposing sensitive information in GE UR family devices. Learn how to secure UR devices effectively.
A detailed analysis of CVE-2021-27424 highlighting the vulnerability, its impact, technical details, and mitigation steps.
Understanding CVE-2021-27424
This section provides insights into the exposure of sensitive information in GE UR family devices to unauthorized actors.
What is CVE-2021-27424?
The vulnerability in GE UR family devices allows unauthorized access to sensitive information due to sharing the MODBUS memory map with encoded details.
The Impact of CVE-2021-27424
The impact includes a medium severity level with low confidentiality and integrity impacts, making it crucial to address to prevent unauthorized information access.
Technical Details of CVE-2021-27424
Explore the specific technical aspects of the vulnerability affecting GE UR family devices.
Vulnerability Description
GE UR firmware versions prior to 8.1x expose a 'Last-key pressed' MODBUS register, potentially granting unauthorized access to sensitive information.
Affected Systems and Versions
The vulnerability affects GE UR family devices running firmware versions prior to 8.1x.
Exploitation Mechanism
Unauthorized actors can exploit the vulnerability by accessing the 'Last-key pressed' MODBUS register on the affected GE UR family devices.
Mitigation and Prevention
Learn about the necessary steps to mitigate and prevent the exploitation of CVE-2021-27424.
Immediate Steps to Take
GE strongly recommends updating UR devices to firmware Version 8.10 or higher to eliminate the vulnerability. Additionally, users are advised to refer to GE Publication Number: GES-2021-004 for further mitigations and details.
Long-Term Security Practices
GE advises utilizing network defense-in-depth practices, securing UR IED within the control system network, implementing access controls, monitoring tools like Intrusion Detection Systems, and following secure configuration guidelines in the UR Deployment guide.
Patching and Updates
Regularly apply patches and updates provided by GE to ensure the security of UR family devices against CVE-2021-27424.