Auth bypass in Fedoraproject Fedora
CVE-2021-3979
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Fedoraproject Fedora — versions 35, 37
- Red Hat Ceph Storage — versions 3.0, 4.3, 5.1
- Red Hat Ceph Storage For IBM Z Systems — versions 4.0
- Red Hat Ceph Storage For Power — versions 4.0
- Red Hat Enterprise Linux — versions 8.0, 7.0
- Red Hat Openshift Container Storage — versions 4.0
- Red Hat Openshift Data Foundation — versions 4.0
- Red Hat OpenStack Platform — versions 13.0
- Ceph — versions Not-Known
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2021-3979 (Vendor Advisory)
- tracker.ceph.com/issues/54006 (Issue Tracking, Vendor Advisory)
- github.com/ceph/ceph/pull/44765 (Patch, Third Party Advisory)
- github.com/ceph/ceph/commit/47c33179f9a15ae95cc1579a421be89378602656 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- lists.debian.org/debian-lts-announce/2023/10/msg00034.html
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-3979?
- CVE-2021-3979 is a medium-severity vulnerability in Fedoraproject Fedora, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 6.5/10. Published 2022-08-25.
- How severe is CVE-2021-3979?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-3979 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.