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Fencer Vulns
critical 9.8

CVE-2021-27023 json

Unsafe HTTP Redirect in Puppet Agent and Puppet Server

published 2021-11-18 4 y ago modified 2026-06-17 4 mo ago also GHSA-93j5-g845-9wqp , EUVD-2021-2488

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

A flaw was discovered in Puppet Agent and Puppet Server that may result in a leak of HTTP credentials when following HTTP redirects to a different host. This is similar to CVE-2018-1000007

Patch / fix

  • rubygems puppet 6.25.1, 7.12.1
  • puppet puppet_agent 6.25.1, 7.12.1
  • puppet puppet_enterprise 2019.8.9, 2021.4
  • puppet puppet_server 6.17.1, 7.4.2
  • puppet-agent RHEL 6.10 SATELLITE_TOOLS, RHEL 6.9 SATELLITE_TOOLS 6.26.0-1.el6sat
  • puppet-agent satellite capsule 6.10, satellite capsule 6.9, satellite 6.10 +3 more 6.26.0-1.el7sat
  • puppet-agent RHEL 6.10 SATELLITE_TOOLS, RHEL 6.9 SATELLITE_TOOLS 6.26.0-1.el8sat
  • puppetserver satellite capsule 6.10, satellite capsule 6.9, satellite 6.10 +1 more 6.18.0-1.el7sat

red hat advisories RHSA-2022:4866RHSA-2022:4867RHSA-2022:1708RHSA-2022:1478

  • rubygem-puppet SLE Module for Advanced Systems Management 12 4.8.1-32.6.1
  • puppet SLE Module for Advanced Systems Management 12 3.8.5-15.18.1

suse advisories SUSE-SU-2022:3794-1SUSE-SU-2022:3355-1

  • puppet Arch Linux 7.12.1-1

arch linux advisories AVG-2541

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-2021-27023 updated cvss 9.8

puppet: unsafe HTTP redirect

  • Red Hat Satellite 6.9 puppet-agent 6.26.0-1.el7sat, puppetserver 6.18.0-1.el7sat
    fixed: vendor fix RHSA-2022:1478
  • Red Hat Satellite 6.10 puppet-agent 6.26.0-1.el7sat, puppetserver 6.18.0-1.el7sat
    fixed: vendor fix RHSA-2022:1708
  • Red Hat Satellite Capsule 6.9 puppet-agent 6.26.0-1.el7sat, puppetserver 6.18.0-1.el7sat
    fixed: vendor fix RHSA-2022:1478
  • Red Hat Satellite Capsule 6.10 puppet-agent 6.26.0-1.el7sat, puppetserver 6.18.0-1.el7sat
    fixed: vendor fix RHSA-2022:1708
  • Red Hat Satellite Tools 6.9 (v. 6.9.ELS Server) puppet-agent 6.26.0-1.el6sat Red Hat Satellite Tools 6.9 (v. 7 Client) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7 ComputeNode) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7 Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7 Workstation) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.2.AUS Server) puppet-agent 6.26.0-1.el7sat
    +30 more products
    Red Hat Satellite Tools 6.9 (v. 7.3.AUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.4.AUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.4.E4S Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.4.TUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.6.AUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.6.E4S Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.6.EUS Compute Node) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.6.EUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.6.TUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.7.AUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.7.E4S Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.7.EUS Compute Node) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.7.EUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 7.7.TUS Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 (v. 8.0.E4S Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.1.E4S Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.1.EUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.2.AUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.2.EUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.2.TUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.4.AUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.4.E4S Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.4.EUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.6.AUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.6.E4S Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.6.EUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8.6.TUS Server) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. 8) puppet-agent 6.26.0-1.el8sat Red Hat Satellite Tools 6.9 (v. RHEL-ALT 7.6 Server) puppet-agent 6.26.0-1.el7sat Red Hat Satellite Tools 6.9 for RHEL 8.2.E4S puppet-agent 6.26.0-1.el8sat
    fixed: vendor fix RHSA-2022:4867

31 more fixed, 9 more not affected in the full advisory

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

1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
rubygems puppet
>=7.0.0, <7.12.1
<6.25.1
7.12.1
6.25.1

Affected products

  • n/a Puppet Enterprise, Puppet Server, Puppet Agent

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.