Auth bypass in Linuxfoundation Ceph
CVE-2021-20288
An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the…
Vulnerability class: Broken Authentication
EPSS: 0.021 (78.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linuxfoundation Ceph
- Debian Debian_linux — versions 10.0
- Fedoraproject Fedora — versions 32, 33, 34
- Redhat Ceph_storage — versions 4.0
- N/a Ceph — versions ceph 14.2.20
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20288?
- CVE-2021-20288 is a high-severity vulnerability in Linuxfoundation Ceph, classified under Improper Authentication. CVSS score: 7.2/10. Published 2021-04-15.
- How severe is CVE-2021-20288?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2021-20288 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.