CVE-2023-25165

Public Exploit
getHostByName Function Information Disclosure

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.15%
Vendor Advisory github.com
Affected: helm helm
Published at:
Updated at:

References

Link Tags
https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8 vendor advisory exploit
https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2 patch

Frequently Asked Questions

What is the severity of CVE-2023-25165?
CVE-2023-25165 has been scored as a medium severity vulnerability.
How to fix CVE-2023-25165?
To fix CVE-2023-25165, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-25165 being actively exploited in the wild?
It is possible that CVE-2023-25165 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-25165?
CVE-2023-25165 affects helm helm.
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