CVE-2021-21303 log

Severity Low
Remote No
Type Insufficient validation
In Helm from version 3.0 and before version 3.5.2, there are a few cases where data loaded from potentially untrusted sources was not properly sanitized. When a SemVer in the `version` field of a chart is invalid, in some cases Helm allows the string to be used "as is" without sanitizing. Helm fails to properly sanitize some fields present in Helm repository `index.yaml` files. Helm does not properly sanitize some fields in the `plugin.yaml` file for plugins. In some cases, Helm does not properly sanitize the fields in the `Chart.yaml` file. By exploiting these attack vectors, core maintainers were able to send deceptive information to a terminal screen running the `helm` command, as well as obscure or alter information on the screen. In some cases, attackers could send codes that terminals used to execute higher-order logic, like clearing a terminal screen. Further, during evaluation, the Helm maintainers discovered a few other fields that were not properly sanitized when read out of repository index files. This fix remedies all such cases, and once again enforces SemVer2 policies on version fields. All users of Helm 3 should upgrade to the fixed version 3.5.2 or later. Those who use Helm as a library should verify that they either sanitize this data on their own, or use the proper Helm API calls to sanitize the data.
Group Package Affected Fixed Severity Status Ticket
AVG-1539 helm 3.5.1-1 3.5.2-1 Low Fixed
Date Advisory Group Package Severity Type
07 Feb 2021 ASA-202102-22 AVG-1539 helm Low insufficient validation