CVE-2021-22286 Explained : Impact and Mitigation
Discover the details of CVE-2021-22286, a Denial of Service vulnerability in ABB SPIET800 and PNI800 modules. Learn about the impact, affected systems, and mitigation steps.
A Denial of Service vulnerability has been discovered in the ABB SPIET800 and PNI800 modules, potentially leading to a module becoming unresponsive. This CVE was published on February 2, 2022, by ABB.
Understanding CVE-2021-22286
This section delves into the details of the vulnerability, its impact, technical aspects, and mitigation strategies.
What is CVE-2021-22286?
The vulnerability involves Improper Input Validation in the SPIET800 INFI-Net to Ethernet Transfer module and PNI800 S+ Ethernet communication interface module by ABB. It allows attackers to trigger denial of service attacks, rendering the module unresponsive.
The Impact of CVE-2021-22286
With a CVSS v3.1 base score of 7.5 and a HIGH severity rating, this vulnerability poses a significant risk to affected devices. Attackers can exploit this flaw to disrupt services and operations, impacting the availability of the systems.
Technical Details of CVE-2021-22286
This section covers detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises due to improper input validation in the affected ABB modules, enabling malicious actors to exploit it for launching denial of service attacks.
Affected Systems and Versions
The ABB SPIET800 and PNI800 modules are affected, specifically those with firmware versions equal to or earlier than A_B.
Exploitation Mechanism
The vulnerability can be exploited remotely by an attacker with network access, leveraging low attack complexity to cause high availability impact.
Mitigation and Prevention
Here are the necessary steps to mitigate the CVE-2021-22286 vulnerability and prevent potential exploitation.
Immediate Steps to Take
ABB advises customers to review their installations for affected products. For SPIET800 devices, the vulnerabilities will be fixed in version A_C or later. For PNI800 devices, the issues will be addressed in version B_0 or later.
Long-Term Security Practices
To enhance security posture, ensure timely updates and patches for all ABB modules. Regularly monitor and assess the network for any suspicious activity.
Patching and Updates
Apply the recommended patches provided by ABB promptly to protect the systems from potential exploitation.