SB2021020906 - Code injection in Helm

Description

This security bulletin contains information about 1 vulnerability.

1) Code injection (CVE-ID: CVE-2021-21303)

CWE-ID: CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via various files in index.yaml, plugin.yaml, and Chart.yaml files and via a SemVer in the version field. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://github.com/helm/helm/commit/6ce9ba60b73013857e2e7c73d3f86ed70bc1ac9a
• https://github.com/helm/helm/releases/tag/v3.5.2
• https://github.com/helm/helm/security/advisories/GHSA-c38g-469g-cmgx