CVE-2021-22995 : What You Need to Know
Learn about CVE-2021-22995 impacting BIG-IQ versions 7.x and 6.x. Understand the security flaw, its impact, affected systems, exploitation, and mitigation steps.
A vulnerability has been identified in BIG-IQ versions 7.x and 6.x that affects the high availability (HA) functionality when utilizing a Quorum device for automatic failover. This CVE, fixed in version 8.0.0, exposes a lack of authentication with the Corosync daemon, potentially leading to a denial-of-service (DoS) attack.
Understanding CVE-2021-22995
This section provides insights into the nature of the CVE and its implications.
What is CVE-2021-22995?
The CVE-2021-22995 involves a security flaw in BIG-IQ versions 7.x and 6.x, specifically related to the lack of authentication in the HA configuration using a Quorum device for failover.
The Impact of CVE-2021-22995
The vulnerability could be exploited by malicious actors to disrupt services, resulting in a denial-of-service condition, potentially impacting the availability and performance of the affected systems.
Technical Details of CVE-2021-22995
In this section, we delve into the technical aspects of the CVE.
Vulnerability Description
The vulnerability in BIG-IQ allows unauthorized individuals to initiate a DoS attack by exploiting the absence of authentication mechanisms in the HA setup with the Corosync daemon.
Affected Systems and Versions
All versions within the 7.x and 6.x branches of BIG-IQ are susceptible to this security flaw. The vulnerability has been addressed in version 8.0.0.
Exploitation Mechanism
Attackers can potentially take advantage of the unauthenticated communication between the Quorum device and the Corosync daemon to disrupt the failover process and cause service interruptions.
Mitigation and Prevention
This section outlines the necessary steps to mitigate the risks associated with CVE-2021-22995.
Immediate Steps to Take
It is advisable to update affected systems to version 8.0.0 or apply appropriate patches provided by the vendor. Additionally, implementing network segmentation and access controls can help reduce the attack surface.
Long-Term Security Practices
Regular security audits, penetration testing, and staying informed about security updates are essential practices to enhance the overall security posture of the IT infrastructure.
Patching and Updates
Stay proactive in applying security patches and updates released by the vendor to address known vulnerabilities and improve system resilience.