CVE-2021-3979

moderate-risk
Published 2022-08-25

A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (12)

Openshift Container Storage
Ceph Storage For Ibm Z Systems
Ceph Storage For Power

Affected Vendors

Redhat Fedoraproject

References (15)

Vendor Advisory https://access.redhat.com/security/cve/CVE-2021-3979
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2024788
Patch https://github.com/ceph/ceph/commit/47c33179f9a15ae95cc1579a421be89378602656
Patch https://github.com/ceph/ceph/pull/44765
https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html
Mailing List https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Issue Tracking https://tracker.ceph.com/issues/54006
Vendor Advisory https://access.redhat.com/security/cve/CVE-2021-3979
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2024788
Patch https://github.com/ceph/ceph/commit/47c33179f9a15ae95cc1579a421be89378602656
Patch https://github.com/ceph/ceph/pull/44765
https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html
https://lists.debian.org/debian-lts-announce/2025/09/msg00025.html
Mailing List https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Issue Tracking https://tracker.ceph.com/issues/54006
42
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 1/34 · Minimal
Exposure 17/34 · Moderate