CVE-2020-15186

Description

In Helm before versions 2.16.11 and 3.3.2 plugin names are not sanitized properly. As a result, a malicious plugin author could use characters in a plugin name that would result in unexpected behavior, such as duplicating the name of another plugin or spoofing the output to `helm --help`. This issue has been patched in Helm 3.3.2. A possible workaround is to not install untrusted Helm plugins. Examine the `name` field in the `plugin.yaml` file for a plugin, looking for characters outside of the [a-zA-Z0-9._-] range.

CVSS Metrics

• v3.1•LOW•Score: 3.4CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N
• v3.1•LOW•Score: 2.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
• v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.23%• Percentile: 46%

Techniques & Countermeasures

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

  The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

• CWE-20•Improper Input Validation

  The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

• helm.sh•helm

  < 2.16.11

• helm.sh/helm•v3

  ≥ 3.0.0, < 3.3.2

• helm•helm

  ≥ 2.0.0, < 2.16.11 | ≥ 3.0.0, < 3.3.2

References (5)

• https://github.com/helm/helm/security/advisories/GHSA-m54r-vrmv-hw33
• https://github.com/helm/helm/commit/809e2d999e2c33e20e77f6bff30652d79c287542
• https://nvd.nist.gov/vuln/detail/CVE-2020-15186
• https://github.com/helm/helm/commit/c8d6b01d72c9604e43ee70d0d78fadd54c2d8499
• https://github.com/helm/helm