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CVE-2020-7942 — Improper Certificate Validation in puppet — CVE...

MEDIUM

Improper Certificate Validation in Puppet

Published April 13, 2021Updated February 22, 2024Source: osv

Summary

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.

Advisory Timeline

  • First published April 13, 2021 (2008 days ago).
  • Last revised February 22, 2024 — 1045 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update puppet to 6.13.0 or later
gem install puppet -v 6.13.0
Bundler
Update puppet to 5.5.19 or later
gem install puppet -v 5.5.19

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
puppet
rubygems
6.0.0, 6.0.1, 6.0.10, 6.0.2 (+27 more)6.13.0
puppet
rubygems
0.13.0, 0.13.1, 0.13.2, 0.13.6 (+190 more)5.5.19

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-295
    Improper Certificate ValidationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2020-7942?
Improper Certificate Validation in Puppet This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.5/10).
How do I check if my project is affected by CVE-2020-7942?
CVE-2020-7942 affects puppet. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-7942 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
6.5

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-gqvf-892r-vjm5

Related CVEs

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