CVE-2020-15186: Improper sanitization of plugin names in Helm
First published: Thu Sep 17 2020(Updated: )
### Impact Security researchers at Trail of Bits discovered that 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`. ### Specific Go Packages Affected helm.sh/helm/v3/pkg/plugin ### Patches This issue has been patched in Helm 3.3.2. ### Workarounds Do 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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/helm.sh/helm | <2.16.11 | 2.16.11 |
| go/helm.sh/helm/v3 | >=3.0.0<3.3.2 | 3.3.2 |
| Helm Helm | >=2.0.0<2.16.11 | |
| Helm Helm | >=3.0.0<3.3.2 |
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Reference Links
- https://github.com/helm/helm/security/advisories/GHSA-m54r-vrmv-hw33
- https://nvd.nist.gov/vuln/detail/CVE-2020-15186
- https://github.com/helm/helm/commit/809e2d999e2c33e20e77f6bff30652d79c287542
- https://github.com/helm/helm/commit/c8d6b01d72c9604e43ee70d0d78fadd54c2d8499
- https://github.com/advisories/GHSA-m54r-vrmv-hw33 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2020-15186?
The severity of CVE-2020-15186 is medium.
How can a malicious plugin author exploit CVE-2020-15186?
A malicious plugin author could exploit CVE-2020-15186 by using characters in a plugin name that result in unexpected behavior, such as duplicating the name of another plugin or spoofing the output.
Which versions of Helm are affected by CVE-2020-15186?
Helm versions 2.0.0 up to exclusive 2.16.11, and Helm v3 versions 3.0.0 up to and including 3.3.2 are affected by CVE-2020-15186.
How can I fix CVE-2020-15186?
To fix CVE-2020-15186, update Helm to version 2.16.11 for Helm v2, and update Helm v3 to version 3.3.2.
Where can I find more information about CVE-2020-15186?
You can find more information about CVE-2020-15186 on the official Helm GitHub security advisories page, the NVD website, and the Helm GitHub commit page.
- collector/github-advisory-latest
- alias/GHSA-m54r-vrmv-hw33
- alias/CVE-2020-15186
- collector/github-advisory
- collector/nvd-index
- collector/nvd-cve
- agent/author
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/references
- agent/remedy
- agent/severity
- agent/weakness
- agent/last-modified-date
- agent/tags
- agent/description
- agent/event
- agent/first-publish-date
- package-manager/go
- vendor/helm
- canonical/helm helm
- version/helm helm/2.0.0
- version/helm helm/3.0.0