VulnerabilityModified
CVE-2021-28503
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.
CRITICAL 9.8EPSS 0.73%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.73% probability · 52th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-305, CWE-287
- Affected
- arista/eos
- Source
- psirt@arista.com
References
- https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072Mitigation, Patch, Vendor Advisory
- https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072Mitigation, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.