Auth bypass in Arista Eos
CVE-2021-28500
An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.008 · change: -0.001
Affected products
- Arista Eos
- Arista Networks Eos — versions 4.26.1F, 4.25.4.M, 4.24.6M
Weakness classification (CWE)
References
- www.arista.com/en/support/advisories-notices/security-advisories/13449-security… (Exploit, Patch, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-28500?
- CVE-2021-28500 is a critical-severity vulnerability in Arista Eos, classified under Improper Authorization. CVSS score: 9.1/10. Published 2022-01-14.
- How severe is CVE-2021-28500?
- Critical severity. CVSS v3 base score is 9.1 out of 10.