Vulnerability · Published Aug 25, 2022 · Assigned by redhat
CVE-2021-3979
Medium 6.5
In plain English
A medium-severity broken cryptography in ceph. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.6%top 51.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ceph | 16.2.9+ds-1 | DEBIAN-CVE-2021-3979 |
| Debian:13 | ceph | 16.2.9+ds-1 | DEBIAN-CVE-2021-3979 |
| Debian:14 | ceph | 16.2.9+ds-1 | DEBIAN-CVE-2021-3979 |
| Ubuntu:22.04:LTS | ceph | 17.2.5-0ubuntu0.22.04.3 | USN-6063-1 |
Affected products (as reported)
Weakness: CWE-327
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2024788
- https://access.redhat.com/security/cve/CVE-2021-3979
- https://tracker.ceph.com/issues/54006
- https://github.com/ceph/ceph/pull/44765
- https://github.com/ceph/ceph/commit/47c33179f9a15ae95cc1579a421be89378602656
- FEDORA-2022-d832fd2f45 vendor-advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00034.html
- https://lists.debian.org/debian-lts-announce/2025/09/msg00025.html