CVE-2021-28495

Description

In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, user authentication can be bypassed when API access is enabled via the JSON-RPC APIs. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.13 and post releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train

Remediation

Solution:

  • Upgrade to MOS-0.26.7 or MOS-0.32.0
  • Install hotfix stored at https://www.arista.com/assets/data/SecurityAdvisories/SA64-67/SecurityAdvisory64-67-Hotfix-mos-1818-2.0.0-1.11.core2_64.rpm For detailed information about hotfix installation, please see the advisory https://www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64

Category

7.2
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.39%
Vendor Advisory arista.com
Affected: Arista Metamako Operating System
Published at:
Updated at:

References

Link Tags
https://www.arista.com/en/support/advisories-notices/security-advisories/12914-security-advisory-66 mitigation vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-28495?
CVE-2021-28495 has been scored as a high severity vulnerability.
How to fix CVE-2021-28495?
To fix CVE-2021-28495: Upgrade to MOS-0.26.7 or MOS-0.32.0
Is CVE-2021-28495 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-28495 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-28495?
CVE-2021-28495 affects Arista Metamako Operating System.
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