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CVE-2022-21672

22
FAUCET Score

CVE-2022-21672 affects the make-ca utility (versions 0.9 to 1.9), which misinterprets Mozilla certdata.txt, causing explicitly untrusted certificates to be treated as trusted. This medium-severity vulnerability (CVSS 6.5) allows a remote attacker to perform a Man-in-the-Middle (MITM) attack by exploiting these previously compromised certificates, leading to high integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog. Users are advised to upgrade to make-ca-1.10 and run 'make-ca -f -g' as root immediately.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.9, < 1.10CPE matchmatch criteria
cpe:2.3:a:linuxfromscratch:make-ca:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 60th percentile among its peer group of 21,924 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / lfs-book/make-ca/issues/19
Issue TrackingMitigationThird Party Advisory
github.com / lfs-book/make-ca/pull/20
PatchThird Party Advisory
github.com / lfs-book/make-ca/security/advisories/GHSA-m5qh-728v-4xrx
PatchThird Party Advisory
lists.linuxfromscratch.org / sympa/arc/blfs-support/2022-01/msg00020.html
Mailing ListMitigationVendor Advisory