CVE-2023-25165
Last modified
CVE-2023-25165 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.76% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Helm | Helm | >= 3.0.0, < 3.11.1 |
References
- https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8Exploit, Vendor Advisory
- https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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