What is CVE-2021-28507?

CVE-2021-28507 is a medium-severity vulnerability in Arista Eos, classified under Improper Access Control. CVSS score: 5.5/10. Published 2022-01-14.

How severe is CVE-2021-28507?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Arista Eos

CVE-2021-28507

An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent.

EPSS: 0.007 (48.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N.

Affected products

Arista Eos — versions 4.21.0f, 4.21.1f, 4.21.3f
Arista Networks Eos — versions 4.22.x, 4.26.2F, 4.25.5.1M

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2021-28507?: CVE-2021-28507 is a medium-severity vulnerability in Arista Eos, classified under Improper Access Control. CVSS score: 5.5/10. Published 2022-01-14.
How severe is CVE-2021-28507?: Medium severity. CVSS v3 base score is 5.5 out of 10.