CVE-2021-20202 : Vulnerability Insights and Analysis

A flaw was found in Keycloak where directories can be created with wider user permissions in the temporary directory, allowing an attacker to access the contents stored by Keycloak. This vulnerability poses a threat to data confidentiality and integrity.

Understanding CVE-2021-20202

This section provides insights into the impact and technical details of CVE-2021-20202.

What is CVE-2021-20202?

CVE-2021-20202 is a vulnerability in Keycloak that enables an attacker to access Keycloak's stored data by creating directories with broader user permissions in the temporary directory.

The Impact of CVE-2021-20202

The primary risk associated with CVE-2021-20202 is the compromise of data confidentiality and integrity due to unauthorized access to Keycloak's contents.

Technical Details of CVE-2021-20202

In this section, we delve into the specifics of the vulnerability.

Vulnerability Description

The flaw allows for the creation of directories with elevated permissions, leading to unauthorized access to Keycloak data stored in the affected directory.

Affected Systems and Versions

Keycloak version 13.0.0 is affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by creating directories in the temporary directory before the Java process does, with wider user permissions.

Mitigation and Prevention

Discover the steps to mitigate the risks posed by CVE-2021-20202.

Immediate Steps to Take

Administrators should restrict directory creation permissions and monitor access to the temporary directory to prevent unauthorized actions.

Long-Term Security Practices

Implement a least privilege principle, regularly audit permissions, and educate users on secure directory creation practices.

Patching and Updates

Ensure timely patching of Keycloak to mitigate CVE-2021-20202, and stay informed about security updates from Red Hat.