CVE-2021-3637 : Vulnerability Insights and Analysis
Learn about CVE-2021-3637, a flaw in keycloak versions before 14.0.0 allowing DoS attacks. Find out impacted systems, exploitation details, and mitigation steps.
A flaw was found in keycloak-model-infinispan in keycloak versions before 14.0.0 where authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly which could lead to a DoS attack.
Understanding CVE-2021-3637
This CVE details a vulnerability in keycloak-model-infinispan that could be exploited for a Denial of Service (DoS) attack.
What is CVE-2021-3637?
The vulnerability in keycloak-model-infinispan in versions prior to 14.0.0 allows the authenticationSessions map in RootAuthenticationSessionEntity to grow boundlessly, posing a risk of a DoS attack.
The Impact of CVE-2021-3637
If exploited, this vulnerability could result in a DoS attack, potentially disrupting the availability of services relying on the affected versions of Keycloak.
Technical Details of CVE-2021-3637
This section covers specific technical details of the vulnerability.
Vulnerability Description
The flaw in keycloak-model-infinispan allows the authenticationSessions map to expand limitlessly, creating a potential avenue for a DoS attack.
Affected Systems and Versions
The vulnerability affects keycloak versions before 14.0.0, specifically in the keycloak-model-infinispan component.
Exploitation Mechanism
The flaw could be exploited by malicious actors to exhaust resources by endlessly growing the authenticationSessions map.
Mitigation and Prevention
To address CVE-2021-3637, certain measures can be taken to mitigate the risk and prevent exploitation.
Immediate Steps to Take
Users are advised to update their Keycloak installations to version 14.0.0 or later to mitigate the vulnerability and prevent potential DoS attacks.
Long-Term Security Practices
Enforcing strict access controls, monitoring system resources, and keeping software up to date are essential long-term security practices to prevent similar vulnerabilities.
Patching and Updates
Regularly applying security patches and updates provided by Keycloak is crucial to ensuring a secure environment and staying protected against known vulnerabilities.