CVE-2021-3762 : Vulnerability Insights and Analysis

A directory traversal vulnerability was found in the ClairCore engine of Clair, allowing for arbitrary file write on the filesystem, potentially leading to remote code execution.

Understanding CVE-2021-3762

This CVE pertains to a vulnerability in the ClairCore engine of Clair that enables an attacker to exploit a crafted container image to achieve arbitrary file write on the filesystem.

What is CVE-2021-3762?

CVE-2021-3762 is a directory traversal vulnerability in ClairCore, which, when triggered by a malicious container image, permits unauthorized file writing actions with the potential for remote code execution.

The Impact of CVE-2021-3762

The impact of CVE-2021-3762 is severe as it can result in unauthorized manipulation of files on the system, compromising the integrity and security of the affected environment.

Technical Details of CVE-2021-3762

This section provides an overview of the technical aspects related to CVE-2021-3762.

Vulnerability Description

The vulnerability allows an attacker to perform directory traversal, leading to unauthorized file writing on the system.

Affected Systems and Versions

Products like

quay/claircore

versions starting from v0.4.6 and v0.5.3 are affected. The issue is fixed in

claircore

versions v0.4.8 and v0.5.5.

Exploitation Mechanism

Exploiting CVE-2021-3762 involves supplying a specially crafted container image to be scanned by Clair, triggering the vulnerability and enabling the attacker to write files on the system.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-3762, immediate steps should be taken alongside adopting long-term security measures.

Immediate Steps to Take

Update the affected

quay/claircore

versions to the patched versions, i.e., v0.4.8 and v0.5.5. Additionally, monitor for any suspicious activities on the system.

Long-Term Security Practices

It is essential to follow secure coding practices, regularly update software components, conduct security audits, and implement robust access controls to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security patches and updates released by the software vendors to address vulnerabilities promptly.