CVE-2021-20182 : Vulnerability Insights and Analysis

A privilege escalation vulnerability has been identified in openshift4/ose-docker-builder. The flaw allows an attacker to exploit the build container with elevated privileges, potentially escalating their access to the cluster admin level, posing a serious threat to data confidentiality, integrity, and system availability.

Understanding CVE-2021-20182

This section provides insights into the nature of the vulnerability.

What is CVE-2021-20182?

The vulnerability in openshift4/ose-docker-builder enables attackers to gain high privileges within the build container, leading to potential escalation to cluster admin privileges.

The Impact of CVE-2021-20182

The highest risk associated with this vulnerability is the compromise of data confidentiality and integrity, as well as the availability of the system.

Technical Details of CVE-2021-20182

Here, we delve into the specifics of the vulnerability.

Vulnerability Description

The flaw allows attackers to operate the build container with elevated privileges, instead of using runc.

Affected Systems and Versions

The affected product is 'openshift' with the vulnerable version 'github.com/openshift/builder v0.0.0-20210118193943-6d10f5202a76'.

Exploitation Mechanism

Attackers gaining access to the build container can exploit underlying node devices like network and storage to escalate privileges.

Mitigation and Prevention

This section outlines the necessary steps to mitigate risks associated with CVE-2021-20182.

Immediate Steps to Take

Implement strict access controls, monitor container activities, and restrict container privileges.

Long-Term Security Practices

Regularly update and patch systems, conduct security assessments, and enhance container security measures.

Patching and Updates

Apply relevant patches from the vendor and stay informed about security advisories.