What’s Vulnerable › Vulnerabilities

CVE-2021-28508: TerminAttr streams IPsec sensitive data in clear text to other authorized users in CVP

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-05-26 · updated 2026-06-17
• Weakness: CWE-255

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 IPsec sensitive data in clear text in CVP to other authorized users, which could cause IPsec traffic to be decrypted or modified by other authorized users on the device.

Affected products

• Arista Networks EOS: from 4.23 through 4.23.11; from 4.24 before 4.24.10; from 4.25 before 4.25.8; from 4.26 before 4.26.6; from 4.27 before 4.27.2 — fixed in 4.24.10, 4.25.8, 4.26.6, 4.27.2
• Arista Networks Terminattr: before 1.10.11; from 1.11.0 before 1.16.8; from 1.17.0 before 1.19.0 — fixed in 1.10.11, 1.16.8, 1.19.0

How to fix

Upgrade to a fixed version: Arista Networks EOS 4.24.10, 4.25.8, 4.26.6, 4.27.2; Arista Networks Terminattr 1.10.11, 1.16.8, 1.19.0. Check the vendor advisory for mitigations.

References

• 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

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