Vulnerability · Published May 26, 2022 · Assigned by Arista
CVE-2021-28509TerminAttr streams MACsec sensitive data in clear text to other authorized users in CVP
Medium 6.1
In plain English
A medium-severity security flaw in Arista EOS from Arista Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
This advisory documents the impact of an internally found vulnerability in Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols. The impact of this vulnerability is that, in certain conditions, TerminAttr might leak MACsec sensitive data in clear text in CVP to other authorized users, which could cause MACsec traffic to be decrypted or modified by other authorized users on the device.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Arista Networks | Arista EOS | 4.23 – through 4.23.114.24 – through 4.24.94.25 – through 4.25.74.26 – through 4.26.54.27 – through 4.27.3 |
| Arista Networks | Arista TerminAttr | v1.10 – through v1.10.10v1.16 – through v1.16.7v1.19 – through v1.19.1 |
Weakness: CWE-255 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N