CVE-2021-28501

Summary

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.

Affected Software

Weaknesses

• CWE-285: CWE-285 Improper Authorization

Workarounds

On the affected versions, all vulnerabilities can be mitigated by disabling OpenConfig gNMI/gNOI and OpenConfig RESTCONF and TerminAttr. If use of these agents is required, a hotfix employing a proxy service can be deployed. To mitigate CVE-2021-28501 with the continued use of the affected agents, a hotfix employing a proxy service can be deployed. The proxy is configured behind the gNMI/gNOI or RESTCONF server. The hotfix can be downloaded at https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.i386.swix for 32 bit systems and https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.x86_64.swix for 64 bit systems.

ADP Enrichment

CVE Program Container

Additional References

• https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071

References

• https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071

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