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CVE-2021-28500

HIGHCVSS 7.8/10EPSS 0.87%

Last modified

CVE-2021-28500 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
0.87%

54.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
AristaEos< 4.20
AristaEos>= 4.21.0, <= 4.21.14m
AristaEos>= 4.22.0, <= 4.22.11m
AristaEos>= 4.23.0, <= 4.23.8m
AristaEos>= 4.24.6.0, <= 4.24.6m
AristaEos>= 4.25.0, <= 4.25.4m
AristaEos>= 4.26.0, <= 4.26.1f

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-28500?
CVE-2021-28500 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28500?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28500?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST