CVE-2022-2393: A flaw was found in pki-core, which could allow a user to get a certificate for another user identity when dir

Routine

MEDIUM 5.7WATCHLISTUPGRADEDOWNGRADEMITIGATE

CVE-2022-2393 is a medium-severity flaw (CVSS 5.7) affecting pki-core, certificate system, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in pki-core, which could allow a user to get a certificate for another user identity when directory-based authentication is enabled. This flaw allows an authenticated attacker on the adjacent network to impersonate another user within the scope of the domain, but they would not be able to decrypt message content.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.7 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 84%)
CISA exploited list	No
Weakness	CWE-285
Published	2022-07-14
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: pki-core project · redhat

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

Am I affected?

Timeline

2022-07-14 15:15 UTCPublished CVE record published
2026-06-17 04:41 UTCUpdated Record last modified

pki-core project pki-core UPGRADE

Affected: <= 10.12.4

Fixed in: newer than 10.12.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pki-core || rpm -q pki-core || pki-core --version

2. UPGRADE to newer than 10.12.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pki-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pki-core

Note

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

redhat certificate system DOWNGRADE

Affected: 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

1. Check installed version

apt-cache policy certificate-system || rpm -q certificate-system || certificate-system --version

2. No fixed release: DOWNGRADE to a release before 9.0 (Debian / Ubuntu)

apt-cache madison certificate-system sudo apt install certificate-system=<VERSION_BEFORE_9.0> sudo apt-mark hold certificate-system

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list certificate-system sudo dnf downgrade certificate-system-<VERSION_BEFORE_9.0> sudo dnf versionlock add certificate-system

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.

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0 · 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-2393?

pki-core: upgrade to newer than 10.12.4; certificate system: downgrade or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-2393 being exploited?

CVE-2022-2393 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-2022-2393 affect?

CVE-2022-2393 affects pki-core, certificate system, enterprise linux. Severity is medium (CVSS 5.7). A flaw was found in pki-core, which could allow a user to get a certificate for another user identity when directory-based authentication is enabled. This flaw allows an authenticated attacker on the adjacent network to impersonate another

How urgent is CVE-2022-2393?

Priority 29/100. On your watchlist

References

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