GHSA-jm56-5h66-w453 Repository index file allows for duplicates of the same chart entry in helm

• Go helm.sh/helm/v3: >= 3.0.0, < 3.3.2 → fixed in 3.3.2 • Go helm.sh/helm: < 2.16.11 → fixed in 2.16.11

Impact During a security audit of Helm's code base, security researchers at Trail of Bits identified a bug in which the a Helm repository can contain duplicates of the same chart, with the last one always used. If a repository is compromised, this lowers the level of access that an attacker needs to inject a bad chart into a repository. To perform this attack, an attacker must have write access to the index file (which can occur during a MITM attack on a non-SSL connection). Specific Go Packages Affected helm.sh/helm/v3/pkg/repo Patches This issue has been patched in Helm 3.3.2 and 2.16.11 Workarounds • do not install charts from repositories you do not trust • fetch charts using a secure channel of communication (such as TLS) • use `helm pull` to fetch the chart, then review the chart’s content (either manually, or with `helm verify` if it has been signed) to ensure it has not been tampered with • manually review the index file in the Helm repository cache before installing software.