CVE-2021-4142: The Candlepin component of Red Hat Satellite was affected by an improper authentication flaw

Routine

MEDIUM 5.5UPGRADE

CVE-2021-4142 is a medium-severity flaw (CVSS 5.5) affecting candlepin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Candlepin component of Red Hat Satellite was affected by an improper authentication flaw. Few factors could allow an attacker to use the SCA (simple content access) certificate for authentication with Candlepin.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-639, CWE-287
Published	2022-08-24
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: candlepinproject

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-08-24 16:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

candlepinproject candlepin UPGRADE

Affected: >= 3.1.0 and <= 3.1.28-2 · >= 3.2.0 and <= 3.2.21-1 · >= 4.1.0 and <= 4.1.8-1

Fixed in: newer than 4.1.8-1

Safe to downgrade to: a release before 3.1.0

1. Check installed version

apt-cache policy candlepin || rpm -q candlepin || candlepin --version

2. UPGRADE to newer than 4.1.8-1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade candlepin

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade candlepin

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)

apt-cache madison candlepin sudo apt install candlepin=<VERSION_BEFORE_3.1.0> sudo apt-mark hold candlepin

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list candlepin sudo dnf downgrade candlepin-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add candlepin

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4142?

candlepin: upgrade to newer than 4.1.8-1. Exact commands for each OS are on this page.

Is CVE-2021-4142 being exploited?

CVE-2021-4142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4142 affect?

CVE-2021-4142 affects candlepin. Severity is medium (CVSS 5.5). The Candlepin component of Red Hat Satellite was affected by an improper authentication flaw. Few factors could allow an attacker to use the SCA (simple content access) certificate for authentication with Candlepin.

How urgent is CVE-2021-4142?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2023-1832 MEDIUM 6.8 UPGRADE DOWNGRADE An improper access control flaw was found in Candlepin

References

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