What is CVE-2021-28506?

CVE-2021-28506 is a critical-severity vulnerability in Arista Eos, classified under Improper Authorization. CVSS score: 9.1/10. Published 2022-01-14.

How severe is CVE-2021-28506?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Arista Eos

CVE-2021-28506

An issue has recently been discovered in Arista EOS where certain gNOI APIs incorrectly skip authorization and authentication which could potentially allow a factory reset of the device.

EPSS: 0.014 (69.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Arista Eos
Arista Networks Eos — versions 4.26.2F, 4.25.5.1M, 4.25.4M

Weakness classification (CWE)

CWE-285 — Improper Authorization
CWE-306 — Missing Authentication for Critical Function
CWE-862 — Missing Authorization

References

psirt@arista.com (Exploit, Patch, x_refsource_MISC, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2021-28506?: CVE-2021-28506 is a critical-severity vulnerability in Arista Eos, classified under Improper Authorization. CVSS score: 9.1/10. Published 2022-01-14.
How severe is CVE-2021-28506?: Critical severity. CVSS v3 base score is 9.1 out of 10.