Auth bypass in Etcd

CVE-2021-28235

Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.

Vulnerability class: Broken Authentication

EPSS: 0.016 (73.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Etcd — versions 3.4.10
N/a — versions n/a

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

h3ck13r/CVE-2021-28235

References

af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
cve@mitre.org (Product)
cve@mitre.org (Product)
cve@mitre.org (Product)
cve@mitre.org

Frequently asked questions

What is CVE-2021-28235?: CVE-2021-28235 is a critical-severity vulnerability in Etcd, classified under Improper Authentication. CVSS score: 9.8/10. Published 2023-04-04.
How severe is CVE-2021-28235?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-28235 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.