CVE-2022-24756: Bareos is open source software for backup, archiving, and recovery of data for operating systems

This week

HIGH 7.5REMOTEUPGRADE

CVE-2022-24756 is a high-severity flaw (CVSS 7.5) affecting bareos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bareos is open source software for backup, archiving, and recovery of data for operating systems. When Bareos Director >= 18.2 but prior to 21.1.0, 20.0.6, and 19.2.12 is built and configured for PAM authentication, a failed PAM authentication will leak a small amount of memory. An attacker that is able to use the PAM Console (i.e. by knowing the shared secret or via the WebUI) can flood the Director with failing login attempts which will eventua

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-401
Published	2022-03-15
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2022-03-15 15:15 UTCPublished CVE record published
2026-06-17 04:32 UTCUpdated Record last modified

bareos bareos UPGRADE

Affected: >= 18.2 and < 19.2.12 · >= 20.0.0 and < 20.0.6 · >= 21.0.0 and < 21.1.0

Fixed in: 19.2.12, 20.0.6, 21.1.0

Safe to downgrade to: a release before 18.2

1. Check installed version

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

2. UPGRADE to 19.2.12 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bareos

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 18.2 (Debian / Ubuntu)

apt-cache madison bareos sudo apt install bareos=<VERSION_BEFORE_18.2> sudo apt-mark hold bareos

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

dnf --showduplicates list bareos sudo dnf downgrade bareos-<VERSION_BEFORE_18.2> sudo dnf versionlock add bareos

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-2022-24756?

bareos: upgrade to 19.2.12, 20.0.6, 21.1.0. Exact commands for each OS are on this page.

Is CVE-2022-24756 being exploited?

CVE-2022-24756 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-2022-24756 affect?

CVE-2022-24756 affects bareos. Severity is high (CVSS 7.5). Bareos is open source software for backup, archiving, and recovery of data for operating systems. When Bareos Director >= 18.2 but prior to 21.1.0, 20.0.6, and 19.2.12 is built and configured for PAM authentication, a failed PAM authenticat

How urgent is CVE-2022-24756?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-24755 HIGH 8.1 UPGRADE Bareos is open source software for backup, archiving, and recovery of data for operating systems
CVE-2020-4042 MEDIUM 6.8 UPGRADE Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without kn
CVE-2020-11061 MEDIUM 6.0 UPGRADE MITIGATE In Bareos Director less than or equal to 16.2.10, 17.2.9, 18.2.8, and 19.2.7, a heap overflow allows a malicio

References

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