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Moderate severityNVD Advisory· Published Feb 8, 2023· Updated Mar 10, 2025

getHostByName Function Information Disclosure

CVE-2023-25165

Description

Helm is a tool that streamlines installing and managing Kubernetes applications.getHostByName is a Helm template function introduced in Helm v3. The function is able to accept a hostname and return an IP address for that hostname. To get the IP address the function performs a DNS lookup. The DNS lookup happens when used with helm install|upgrade|template or when the Helm SDK is used to render a chart. Information passed into the chart can be disclosed to the DNS servers used to lookup the IP address. For example, a malicious chart could inject getHostByName into a chart in order to disclose values to a malicious DNS server. The issue has been fixed in Helm 3.11.1. Prior to using a chart with Helm verify the getHostByName function is not being used in a template to disclose any information you do not want passed to DNS servers.

AI Insight

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
helm.sh/helm/v3Go
>= 3.0.0, < 3.11.13.11.1

Affected products

29

Patches

Vulnerability mechanics

References

6

News mentions

0

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