CVE-2023-47630 : What You Need to Know

Kyverno is a policy engine designed for Kubernetes. An issue was found in Kyverno that allowed an attacker to control the digest of images used by Kyverno users. The vulnerability could be exploited by compromising the registry from which Kyverno users fetch their images, enabling the attacker to return a vulnerable image to the user. This could potentially allow the attacker to escalate their position within the Kubernetes environment. Users who pull images by digest from trusted registries are not affected. The issue has been patched in version 1.10.5, and all users are strongly advised to update to this version.

Understanding CVE-2023-47630

This section provides insights into the nature and impact of the CVE-2023-47630 vulnerability.

What is CVE-2023-47630?

CVE-2023-47630 refers to a vulnerability in Kyverno that could enable an attacker to manipulate the digest of images used by Kyverno users. By compromising the registry, the attacker could introduce vulnerable images to the users, potentially leading to further exploitation within the Kubernetes environment.

The Impact of CVE-2023-47630

The impact of this vulnerability includes high severity in terms of confidentiality, integrity, and availability. By exploiting this vulnerability, an attacker could potentially gain unauthorized access and compromise the Kubernetes environment, posing significant risks to affected systems.

Technical Details of CVE-2023-47630

This section outlines specific technical details related to CVE-2023-47630.

Vulnerability Description

The vulnerability allows attackers to control the digest of images fetched by Kyverno users, potentially leading to the introduction of vulnerable images and subsequent escalation of privileges within the Kubernetes environment.

Affected Systems and Versions

The affected system is Kyverno, specifically versions prior to 1.10.5. Users running versions older than 1.10.5 are at risk of exploitation through this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability by compromising the registry to manipulate the images fetched by Kyverno users, subsequently leveraging these images to escalate privileges within the Kubernetes environment.

Mitigation and Prevention

This section provides guidance on mitigating the risks associated with CVE-2023-47630.

Immediate Steps to Take

To address this vulnerability, all users are strongly advised to update Kyverno to version 1.10.5. Updating to the patched version will eliminate the exploitability of this vulnerability.

Long-Term Security Practices

In the long term, it is recommended to follow secure image practices, verify the authenticity of image sources, and regularly update and patch software to prevent similar vulnerabilities.

Patching and Updates

Regularly check for security updates and patches related to Kyverno and ensure timely application of these updates to maintain a secure Kubernetes environment.