Helm uses crypto package vulnerable to panic from malformed X.509 certificate

The Helm core maintainers have identified a high severity security vulnerability in Go's crypto package affecting all versions prior to Helm 2.16.8 and Helm 3.1.0.

Thanks to @ravin9249 for identifying the vulnerability.

Impact

Go before 1.12.16 and 1.13.x before 1.13.7 (and the crypto/cryptobyte package before 0.0.0-20200124225646-8b5121be2f68 for Go) allows attacks on clients resulting in a panic via a malformed X.509 certificate. This may allow a remote attacker to cause a denial of service.

Patches

A patch to compile Helm against Go 1.14.4 has been provided for Helm 2 and is available in Helm 2.16.8. Helm 3.1.0 and newer are compiled against Go 1.13.7+.

Workarounds

No workaround is available. Users are urged to upgrade.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-7919
• https://github.com/helm/helm/pull/8288

For more information

If you have any questions or comments about this advisory:

• Open an issue in the Helm repository
• For security-specific issues, email us at cncf-helm-security@lists.cncf.io