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 2022-01-14 20:15:10
Updated 2023-08-17 14:47:30
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2021-28500

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-28500

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.9
MEDIUM AV:L/AC:M/Au:N/C:C/I:C/A:C
3.4
10.0
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
NIST
9.1
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
3.9
5.2
Arista Networks, Inc.

CWE ids for CVE-2021-28500

  • The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
    Assigned by: psirt@arista.com (Secondary)

References for CVE-2021-28500

Products affected by CVE-2021-28500

  • Arista » EOS
    Versions from including (>=) 4.25.0 and up to, including, (<=) 4.25.4m
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions before (<) 4.20
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions from including (>=) 4.26.0 and up to, including, (<=) 4.26.1f
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions from including (>=) 4.21.0 and up to, including, (<=) 4.21.14m
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions from including (>=) 4.22.0 and up to, including, (<=) 4.22.11m
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions from including (>=) 4.23.0 and up to, including, (<=) 4.23.8m
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
  • Arista » EOS
    Versions from including (>=) 4.24.6.0 and up to, including, (<=) 4.24.6m
    cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
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