What is CVE-2021-28505?

CVE-2021-28505 is a high-severity vulnerability in Arista Ccs-710p-12, classified under Improper Access Control. CVSS score: 7.5/10. Published 2022-04-14.

How severe is CVE-2021-28505?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Arista Ccs-710p-12

CVE-2021-28505

On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP proto…

EPSS: 0.009 (54.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Arista Ccs-710p-12
Arista Ccs-710p-16p
Arista Ccs-720xp-24y6
Arista Ccs-720xp-24zy4
Arista Ccs-720xp-48y6
Arista Ccs-720xp-48zc2
Arista Ccs-720xp-96zc2
Arista Ccs-722xpm-48y4
Arista Ccs-722xpm-48zy8
Arista Dcs-7010tx-48

Weakness classification (CWE)

CWE-284 — Improper Access Control
CWE-863 — Incorrect Authorization

References

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

Frequently asked questions

What is CVE-2021-28505?: CVE-2021-28505 is a high-severity vulnerability in Arista Ccs-710p-12, classified under Improper Access Control. CVSS score: 7.5/10. Published 2022-04-14.
How severe is CVE-2021-28505?: High severity. CVSS v3 base score is 7.5 out of 10.