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Fencer Vulns
medium 5.4

CVE-2018-11751 json

Previous versions of Puppet Agent didn't verify the peer in the SSL connection prior to downloading the CRL.

published 2019-12-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3770

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

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.

Patch / fix

  • puppet puppet_server 6.4.0
  • tfm satellite capsule 6.8, satellite 6.8 6.1-1.el7sat
  • kobo satellite capsule 6.8, satellite 6.8 0.5.1-1.el7sat
  • pulp satellite capsule 6.8, satellite 6.8 2.21.3-1.el7sat
  • gofer satellite capsule 6.8, satellite 6.8 2.12.5-7.el7sat
  • future satellite capsule 6.8, satellite 6.8 0.16.0-11.el7sat
  • ostree satellite capsule 6.8, satellite 6.8 2017.1-2.atomic.el7
  • foreman satellite capsule 6.8, satellite 6.8 2.1.2.19-1.el7sat
  • katello satellite capsule 6.8, satellite 6.8 3.16.0-1.el7sat

red hat advisories RHSA-2020:4366

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-11751 updated cvss 3.7

puppet-agent: Puppet Agent does not properly verify SSL connection when downloading a CRL

  • Red Hat OpenStack Platform 10 (Newton) puppet, puppet-server
    affected: no fix planned “Out of support scope”
  • Red Hat Update Infrastructure 3 for Cloud Providers puppet
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6.8 tfm 6.1-1.el7sat, kobo 0.5.1-1.el7sat, pulp 2.21.3-1.el7sat, gofer 2.12.5-7.el7sat, receptor 0.6.3-1.el7ar, future 0.16.0-11.el7sat, +488 more Red Hat Satellite Capsule 6.8 tfm 6.1-1.el7sat, kobo 0.5.1-1.el7sat, pulp 2.21.3-1.el7sat, gofer 2.12.5-7.el7sat, future 0.16.0-11.el7sat, katello 3.16.0-1.el7sat, +232 more
    fixed: vendor fix RHSA-2020:4366
  • Red Hat OpenStack Platform 13 (Queens) puppet, puppet-server Red Hat OpenStack Platform 15 (Stein) puppet, puppet-server, puppet-headless Red Hat OpenStack Platform 16 (Train) puppet, puppet-server, puppet-headless
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD 2.0 4.8 AV:A/AC:L/Au:N/C:N/I:P/A:P

Affected products

  • n/a Puppet Agent, Puppet

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.