Paper/Archive/CVE-2021-28503

CVE-2021-28503

Arista Networks Arista EOS — In Arista's EOS software affected releases, eAPI might skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.

EPSS 0.7%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 54.4.544 × 2010.9 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.

Affected

ProductAffectedFixed inSource

Arista EOSEOS-4.23 – < EOS-4.23.10EOS-4.23.10CNA

Arista EOSEOS-4.24 – < EOS-4.24.8EOS-4.24.8CNA

Arista EOSEOS-4.25 – < EOS-4.25.6EOS-4.25.6CNA

Arista EOSEOS-4.26 – < EOS-4.26.3EOS-4.26.3CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Arista (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

References

refarista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072