id: GO-2023-1547
modules:
    - module: helm.sh/helm/v3
      versions:
        - fixed: 3.11.1
      vulnerable_at: 3.11.0
      packages:
        - package: helm.sh/helm/v3/cmd/helm
          symbols:
            - addInstallFlags
            - newUpgradeCmd
          derived_symbols:
            - main
        - package: helm.sh/helm/v3/pkg/action
          symbols:
            - Configuration.renderResources
            - Install.RunWithContext
            - Upgrade.prepareUpgrade
          derived_symbols:
            - Install.Run
            - Lint.Run
            - Upgrade.Run
            - Upgrade.RunWithContext
        - package: helm.sh/helm/v3/pkg/engine
          symbols:
            - Engine.initFunMap
          derived_symbols:
            - Engine.Render
            - Render
            - RenderWithClient
summary: Information disclosure in helm.sh/helm/v3
description: |-
    An information disclosure vulnerability exists in the `getHostByName` template
    function.

    `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.
cves:
    - CVE-2023-25165
ghsas:
    - GHSA-pwcw-6f5g-gxf8
credits:
    - Philipp Stehle of SAP
references:
    - advisory: https://github.com/helm/helm/security/advisories/GHSA-pwcw-6f5g-gxf8
    - fix: https://github.com/helm/helm/commit/293b50c65d4d56187cd4e2f390f0ada46b4c4737