CVE-2022-23526 Explained : Impact and Mitigation

Helm contains Denial of service through a schema file.

Understanding CVE-2022-23526

Helm is a tool for managing Charts, pre-configured Kubernetes resources. Versions prior to 3.10.3 are subject to NULL Pointer Dereference in the

_chartutil_

package that can cause a segmentation violation.

What is CVE-2022-23526?

The vulnerability in Helm exists due to the

_chartutil_

package parsing a schema file. Certain schema files can cause memory violations, leading to a Denial of Service condition.

The Impact of CVE-2022-23526

Applications using Helm SDK to parse schema files may suffer a Denial of Service attack, although the panic will not affect future Helm client operations. The issue has been fixed in version 3.10.3.

Technical Details of CVE-2022-23526

Vulnerability Description

The vulnerability arises from the parsing of a schema file in the

_chartutil_

package, potentially leading to a DoS attack.

Affected Systems and Versions

Helm versions prior to 3.10.3 are impacted by this vulnerability.

Exploitation Mechanism

By passing a specifically crafted schema file to Helm SDK, an attacker can trigger a panic leading to a DoS condition.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to update to Helm version 3.10.3 or later to prevent exploitation of this vulnerability.

Long-Term Security Practices

Regularly update Helm and its dependencies to ensure that known vulnerabilities are patched promptly.

Patching and Updates

Ensure that schema files passed to

_chartutil_

functions are correctly formatted to prevent DoS attacks.