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Improper Sanitizing of plugin names in helm

Low severity GitHub Reviewed Published Sep 17, 2020 in helm/helm • Updated Oct 2, 2023

Package

gomod helm.sh/helm (Go)

Affected versions

< 2.16.11

Patched versions

2.16.11
gomod helm.sh/helm/v3 (Go)
>= 3.0.0, < 3.3.2
3.3.2

Description

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.

References

@technosophos technosophos published to helm/helm Sep 17, 2020
Published by the National Vulnerability Database Sep 17, 2020
Reviewed May 24, 2021
Published to the GitHub Advisory Database May 24, 2021
Last updated Oct 2, 2023

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N

EPSS score

0.050%
(22nd percentile)

Weaknesses

CVE ID

CVE-2020-15186

GHSA ID

GHSA-m54r-vrmv-hw33

Source code

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