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CVE-2021-3979· NVD / CVE Program· CNA redhat

A key length flaw was found in Red Hat Ceph Storage.

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.55% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: ceph (Debian:10) 12.2.11+dfsg1-2.1+deb10u1; ceph (Debian:11) 14.2.21-1+deb11u1; ceph (Debian:12) 16.2.9+ds-1.

Low priority for now. Upgrade to ceph (Debian:10) 12.2.11+dfsg1-2.1+deb10u1; ceph (Debian:11) 14.2.21-1+deb11u1; ceph (Debian:12) 16.2.9+ds-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Aug 25, 2022
Updated
Jun 17, 2026
EPSS
0.5% · 45th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatceph storage
redhatopenshift container storage
redhatopenshift data foundation
redhatopenstack platform
redhatceph storage for ibm z systems
redhatceph storage for power
redhatenterprise linux
fedoraprojectfedora

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora35
  • fedoraproject fedora37
  • redhat ceph storage3.0
  • redhat ceph storage4.0
  • redhat ceph storage4.3
  • redhat ceph storage5.0
  • redhat ceph storage5.1
  • redhat ceph storage for ibm z systems4.0
  • redhat ceph storage for power4.0
  • redhat openshift container storage4.0
  • redhat openshift data foundation4.0
  • redhat openstack platform13.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a ceph

    • Not-Knownaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10cephbefore 12.2.11+dfsg1-2.1+deb10u112.2.11+dfsg1-2.1+deb10u1
Debian:11cephbefore 14.2.21-1+deb11u114.2.21-1+deb11u1
Debian:12cephbefore 16.2.9+ds-116.2.9+ds-1
openSUSE:Leap 15.3ceph-testbefore 16.2.9.536+g41a9f9a5573-150300.6.3.116.2.9.536+g41a9f9a5573-150300.6.3.1
openSUSE:Leap 15.4ceph-testbefore 16.2.9.536+g41a9f9a5573-150400.3.3.116.2.9.536+g41a9f9a5573-150400.3.3.1
openSUSE:Tumbleweedcephbefore 16.2.9.536+g41a9f9a5573-1.116.2.9.536+g41a9f9a5573-1.1
Red Hat:ceph_storage:4::el7cephbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-basebefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-commonbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-debuginfobefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-fusebefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-grafana-dashboardsbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mdsbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mgrbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mgr-dashboardbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mgr-diskprediction-localbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mgr-k8seventsbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-mgr-rookbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-monbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-osdbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-radosgwbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-selinuxbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7ceph-testbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp
Red Hat:ceph_storage:4::el7libcephfs-develbefore 2:14.2.22-110.el7cp2:14.2.22-110.el7cp

+96

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-9579A flaw was found in the way Ceph Object Gateway would process cross-origin HTTP requests if the CORS policy was set to allow origin on a buc
    31Monitor
  • CVE-2018-1128It was found that cephx authentication protocol did not verify ceph clients correctly and was vulnerable to replay attack.
    30Monitor
  • CVE-2020-1759A vulnerability was found in Red Hat Ceph Storage 4 and Red Hat Openshift Container Storage 4.2 where, A nonce reuse vulnerability was disco
    27Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-10753Jun 26, 2020 · A flaw was found in the Red Hat Ceph Storage RadosGW (Ceph Object Gateway).
    26Monitor
  • ← EarlierCVE-2021-3509May 26, 2021 · A flaw was found in Red Hat Ceph Storage 4, in the Dashboard component.
    25Monitor
  • Later →CVE-2022-3854Mar 6, 2023 · A flaw was found in Ceph, relating to the URL processing on RGW backends.
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ceph16.2.9+ds-1 · Debian:12Package registry (OSV)
opensuse:ceph16.2.9.536+g41a9f9a5573-150400.3.3.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:ceph-test16.2.9.536+g41a9f9a5573-150400.3.3.1 · openSUSE:Leap 15.4Package registry (OSV)
opensuse:fmt8.0.1-150300.7.5.1 · openSUSE:Leap Micro 5.2Package registry (OSV)
red hat:ceph2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-base2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-base-debuginfo2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-common2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-common-debuginfo2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-debugsource2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-fuse-debuginfo2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-grafana-dashboards2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-immutable-object-cache-debuginfo2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-mds-debuginfo2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-mgr2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
red hat:ceph-mgr-cephadm2:16.2.7-98.el8cp · Red Hat:ceph_storage:5.1::el8Package registry (OSV)
suse:ceph16.2.9.536+g41a9f9a5573-150300.3.3.1 · SUSE:Enterprise Storage 7.1Package registry (OSV)
suse:ceph16.2.9.536+g41a9f9a5573-150400.3.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP4Package registry (OSV)
suse:fmt8.0.1-150300.7.5.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-327 · Use of a Broken or Risky Cryptographic Algorithm

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records