Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Helm | Helm | >= 3.0.0, < 3.11.1 |
Related Weaknesses (CWE)
References
- https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2Patch
- https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8ExploitVendor Advisory
- https://github.com/helm/helm/commit/5abcf74227bfe8e5a3dbf105fe62e7b12deb58d2Patch
- https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8ExploitVendor Advisory
FAQ
What is CVE-2023-25165?
CVE-2023-25165 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ...
How severe is CVE-2023-25165?
CVE-2023-25165 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-25165?
Check the references section above for vendor advisories and patch information. Affected products include: Helm Helm.