What is CVE-2021-28500?

CVE-2021-28500 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-2021-28500?

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

Auth bypass in Arista Eos

CVE-2021-28500

An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.

EPSS: 0.009 (54.8th 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 4.26.1F, 4.25.4.M, 4.24.6M

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

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

Frequently asked questions

What is CVE-2021-28500?: CVE-2021-28500 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-2021-28500?: Critical severity. CVSS v3 base score is 9.1 out of 10.