CVE-2022-21672: make-ca is a utility to deliver and manage a complete PKI configuration for workstations and servers

This month

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2022-21672 is a medium-severity flaw (CVSS 6.5) affecting make-ca. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

make-ca is a utility to deliver and manage a complete PKI configuration for workstations and servers. Starting with version 0.9 and prior to version 1.10, make-ca misinterprets Mozilla certdata.txt and treats explicitly untrusted certificates like trusted ones, causing those explicitly untrusted certificates trusted by the system. The explicitly untrusted certificates were used by some CAs already hacked. Hostile attackers may perform a MIM attac

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-115
Published	2022-01-10
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: linuxfromscratch

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

Am I affected?

Timeline

2022-01-10 21:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

linuxfromscratch make-ca UPGRADE

Affected: >= 0.9 and < 1.10

Fixed in: 1.10

Safe to downgrade to: a release before 0.9

1. Check installed version

apt-cache policy make-ca || rpm -q make-ca || make-ca --version

2. UPGRADE to 1.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade make-ca

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade make-ca

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 0.9 (Debian / Ubuntu)

apt-cache madison make-ca sudo apt install make-ca=<VERSION_BEFORE_0.9> sudo apt-mark hold make-ca

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

dnf --showduplicates list make-ca sudo dnf downgrade make-ca-<VERSION_BEFORE_0.9> sudo dnf versionlock add make-ca

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-2022-21672?

make-ca: upgrade to 1.10. Exact commands for each OS are on this page.

Is CVE-2022-21672 being exploited?

CVE-2022-21672 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-2022-21672 affect?

CVE-2022-21672 affects make-ca. Severity is medium (CVSS 6.5). make-ca is a utility to deliver and manage a complete PKI configuration for workstations and servers. Starting with version 0.9 and prior to version 1.10, make-ca misinterprets Mozilla certdata.txt and treats explicitly untrusted certificat

How urgent is CVE-2022-21672?

Priority 41/100. On your watchlist

References

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