In Helm before versions 2.16.11 and 3.3.2, 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). This issue has been patched in Helm 3.3.2 and 2.16.11. A possible workaround is to manually review the index file in the Helm repository cache before installing software.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15185
Reference (s):
- https://github.com/helm/helm/security/advisories/GHSA-jm56-5h66-w453
- URL: https://github.com/helm/helm/security/advisories/GHSA-jm56-5h66-w453
- https://github.com/helm/helm/commit/055dd41cbe53ce131ab0357524a7f6729e6e40dc
- URL: https://github.com/helm/helm/commit/055dd41cbe53ce131ab0357524a7f6729e6e40dc