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TI-2018-08411 Aliases CVE-2018-11751GHSA-vvrg-mw82-38g2

Improper certificate validation in Puppet Agent, Puppet

Priority LOW 25CWE-295Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
None · Low · Low
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-295.

Summary

Previous versions of Puppet Agent didn't verify the peer in the SSL connection prior to downloading the CRL. This issue is resolved in Puppet Agent 6.4.0.

Why it matters now

EPSS 0.00608 49th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Puppet Agent, PuppetPuppet Agent 6.x prior to 6.4.0, Puppet 6.x prior to 6.4.x—No fix listedCNA
  • Puppet Agent, Puppet Vendor— Affected Puppet Agent 6.x prior to 6.4.0, Puppet 6.x prior to 6.4.x Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:puppet:puppet_server:*:*:*:*:*:*:*:*6.0.0 to before 6.4.0VulnerablePuppet
  • cpe:2.3:a:puppet:puppet_server:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.4.0 Vulnerable ·Puppet

Remediation

Red Hat 1 advisory

  • RHSA-2020:4366 Released 2020-10-27 · Red Hat rating Important
    Satellite 6.8 release
    • Red Hat Satellite 6.8 ansible-collection-redhat-satellite-1.3.0-1.el7sat, ansible-runner-1.4.6-1.el7ar, ansiblerole-foreman_scap_client-0.0.5-1.el7sat +47
    • Red Hat Satellite Capsule 6.8 ansible-collection-redhat-satellite-1.3.0-1.el7sat, ansible-runner-1.4.6-1.el7ar, ansiblerole-foreman_scap_client-0.0.5-1.el7sat +47

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenStack Platform 10 (Newton)AffectedNo fix planned: Out of support scope
Red Hat Update Infrastructure 3 for Cloud ProvidersAffectedNo fix planned: Will not fix
Red Hat Satellite 6.8Fixed RHSA-2020:4366
Red Hat Satellite Capsule 6.8Fixed RHSA-2020:4366
Not affected: 3 products
  • Red Hat OpenStack Platform 13 (Queens)
  • Red Hat OpenStack Platform 15 (Stein)
  • Red Hat OpenStack Platform 16 (Train)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-11751
  2. 2026-10-03 Alias added: GHSA-vvrg-mw82-38g2

References

Advisory 1

  • TI-2016-02327 Puppet Server before 2.3.2 and Ruby puppetmaster in Puppet 4.x before 4.4.2 and in Puppet… CVSS 3.1CRITICAL 9.8
  • TI-2021-08596 A flaw was discovered in Puppet Agent and Puppet Server that may result in a leak of HTTP… CVSS 3.1CRITICAL 9.8
  • TI-2020-06424 Incorrect default permissions in Puppet Enterprise 2018.1.x stream CVSS 3.1HIGH 7.5
  • TI-2023-04831 Denial of Service for Revocation of Auto Renewed Certificates CVSS 3.1HIGH 7.5
  • TI-2023-01780 Regular expression denial of service in Puppet Enterprise CVSS 3.1MEDIUM 5.3
  • TI-2014-05976 Race condition in Puppet Server 0.2.0 allows local users to obtain sensitive information… CVSS 2.0LOW 1.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences