Helm up to 3.11.0 information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Helm up to 3.11.0. Impacted is an unknown function. Executing a manipulation can lead to information disclosure. This vulnerability is handled as CVE-2023-25165. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Helm up to 3.11.0. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was released 02/08/2023 as GHSA-pwcw-6f5g-gxf8. The advisory is shared for download at github.com. This vulnerability was named CVE-2023-25165 since 02/03/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.11.1 eliminates this vulnerability. Applying the patch 5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• Helm

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11.0

License

• open-source

Website

• Product: https://github.com/helm/helm/

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