| Package | Affected versions | Patched versions |
|---|---|---|
| puppet | ≥ 6.0.0, < 6.13.0< 5.5.19 | 6.13.05.5.19 |
| puppet | ≥ 5.5.0, < 5.5.19≥ 6.0.0, < 6.13.0 | 5.5.196.13.0 |
| puppet agent | ≥ 5.5.0, < 5.5.19≥ 6.0.0, < 6.13.0 | 5.5.196.13.0 |
Previously, Puppet operated on the model that a node with a valid certificate was entitled to all information in the system and that a compromised certificate allowed access to everything in the infrastructure. When a node's catalog falls back to the default node, the catalog can be retrieved for a different node by modifying facts for the Puppet run. This issue can be mitigated by setting strict_hostname_checking = true in puppet.conf on your Puppet master. Puppet 6.13.0 changes the default behavior for strict_hostname_checking from false to true. It is recommended that Puppet Open Source and Puppet Enterprise users that are not upgrading still set strict_hostname_checking to true to ensure secure behavior.
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