CVE-2021-28509: TerminAttr streams MACsec sensitive data in clear text to other authorized users in CVP
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 Software
Remediation
Information
Event History
Frequently Asked Questions
What is CVE-2021-28509?
CVE-2021-28509 is a vulnerability in Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols that could lead to the leakage of MACsec sensitive data in clear text.
Which software is affected by CVE-2021-28509?
Arista TerminAttr versions up to 1.10.11, Arista TerminAttr versions between 1.11.0 and 1.16.8, and Arista TerminAttr versions between 1.17.0 and 1.19.2, as well as Arista EOS versions between 4.23 and 4.23.11, 4.24 and 4.24.10, 4.25 and 4.25.8, 4.26 and 4.26.6, and 4.27 and 4.27.4 are affected.
What is the severity of CVE-2021-28509?
CVE-2021-28509 has a severity rating of 6.1 (Medium).
How can I fix CVE-2021-28509?
To fix CVE-2021-28509, update Arista TerminAttr to version 1.10.11 or later, or update Arista EOS to version 4.23.11 or later.
Where can I find more information about CVE-2021-28509?
You can find more information about CVE-2021-28509 at the following link: [https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077](https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077)