Vulnerability · Published Feb 4, 2022 · Assigned by Arista
CVE-2021-28503In 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.
High 7.4
In plain English
A high-severity security flaw in Arista EOS from Arista Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.7%top 45.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Arista Networks | Arista EOS | EOS-4.23 – before EOS-4.23.10EOS-4.24 – before EOS-4.24.8EOS-4.25 – before EOS-4.25.6EOS-4.26 – before EOS-4.26.3 |
Weakness: CWE-305 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H