CVE-2021-20718 : Security Advisory and Response

A detailed overview of CVE-2021-20718, a vulnerability in mod_auth_openidc versions 2.4.0 to 2.4.7 that can lead to a denial-of-service (DoS) attack.

Understanding CVE-2021-20718

This section covers the impact, technical details, and mitigation strategies related to CVE-2021-20718.

What is CVE-2021-20718?

CVE-2021-20718 is a vulnerability in mod_auth_openidc 2.4.0 to 2.4.7 that allows a remote attacker to trigger a denial-of-service (DoS) condition through unspecified methods.

The Impact of CVE-2021-20718

The vulnerability can be exploited by a remote attacker to launch a DoS attack on systems running affected versions of mod_auth_openidc, impacting the availability of services.

Technical Details of CVE-2021-20718

Understanding the vulnerability description, affected systems, and exploitation mechanisms of CVE-2021-20718.

Vulnerability Description

mod_auth_openidc versions 2.4.0 to 2.4.7 are susceptible to remote attackers causing a DoS condition without specified attack vectors.

Affected Systems and Versions

The vulnerability affects versions 2.4.0 to 2.4.7 of mod_auth_openidc by ZmartZone, posing a risk to systems leveraging these versions.

Exploitation Mechanism

By exploiting the undisclosed vectors, threat actors can exploit this vulnerability remotely to disrupt services and induce a DoS condition.

Mitigation and Prevention

Best practices to address and prevent the exploitation of CVE-2021-20718.

Immediate Steps to Take

System administrators should consider immediate mitigation strategies, such as applying patches and restricting network access.

Long-Term Security Practices

Incorporating strong security measures like regular security audits, network segmentation, and access controls can bolster long-term defense against such vulnerabilities.

Patching and Updates

Regularly check for security updates and patches released by ZmartZone for mod_auth_openidc to mitigate the CVE-2021-20718 vulnerability.