An issue has recently been discovered in Arista EOS where certain gNOI APIs incorrectly skip authorization and authentication which could potentially allow a factory reset of the device.
The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release. CVE-2021-28506 has been fixed in the following releases: 4.26.3M and later releases in the 4.26.x train 4.25.6M and later releases in the 4.25.x train 4.25.4.1M and later releases in the 4.25.4.x train 4.24.8M and later releases in the 4.24.x train
No mitigation options available To mitigate CVE-2021-28506 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.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Arista Networks EOS | >=4.24.7M<=4.24.2F | 4.24.2F | advisory ↗ |
| Arista Networks EOS | >=4.25.3<=4.25.0 | 4.25.0 | advisory ↗ |
| Arista Networks EOS | >=4.25.4M<=4.25.4 | 4.25.4 | advisory ↗ |
| Arista Networks EOS | >=4.25.5.1M<=4.25.5 | 4.25.5 | advisory ↗ |
| Arista Networks EOS | >=4.26.2F<=4.26.0 | 4.26.0 | advisory ↗ |