What’s Vulnerable › Vulnerabilities

CVE-2021-27023

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-18 · updated 2026-06-17

Description

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

Affected products

• Fedoraproject Fedora: 35
• Puppet Agent: before 6.25.1; from 7.0.0 before 7.12.1 — fixed in 6.25.1, 7.12.1
• Puppet Enterprise: before 2019.8.9; from 2021.0.0 before 2021.4 — fixed in 2019.8.9, 2021.4
• Puppet server: before 6.17.1; from 7.0.0 before 7.4.2 — fixed in 6.17.1, 7.4.2

How to fix

Upgrade to a fixed version: Puppet Agent 6.25.1, 7.12.1; Puppet Enterprise 2019.8.9, 2021.4; Puppet server 6.17.1, 7.4.2. Check the vendor advisory for mitigations.

References

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62SELE7EKVKZL4GABFMVYMIIUZ7FPEF7/
• https://puppet.com/security/cve/CVE-2021-27023
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62SELE7EKVKZL4GABFMVYMIIUZ7FPEF7/
• https://puppet.com/security/cve/CVE-2021-27023

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