VulnerabilityModified

CVE-2021-28509

This advisory documents the impact of an internally found vulnerability in Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols.

MEDIUM 6.1EPSS 0.46%

Does this matter?

Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
EPSS: 0.46% probability · 39th percentile
CISA KEV: Not listed
Weakness: CWE-255, CWE-319
Affected: arista/terminattr · arista/eos
Source: psirt@arista.com

References

https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077Exploit, Vendor Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077Exploit, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.