Vulnerability Monitor

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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. 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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 45 products from arista, from arista, from arista and 42 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-05-26T20:15:08.500

Last Modified

2024-11-21T05:59:48.463

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.1 (MEDIUM)

CVSSv2 Vector

AV:N/AC:H/Au:S/C:P/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: HIGH
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

3.9

Impact Score

4.9

Weaknesses
  • Type: Secondary
    CWE-255
  • Type: Primary
    CWE-319
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista ccs-722xpm-48y4 - No
Hardware arista ccs-722xpm-48zy8 - No
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista 7050cx3-32s - No
Hardware arista 7050cx3m-32s - No
Hardware arista 7050sx3-48c8 - No
Hardware arista 7050sx3-48yc - No
Hardware arista 7050sx3-48yc12 - No
Hardware arista 7050sx3-48yc8 - No
Hardware arista 7050sx3-96yc8 - No
Hardware arista 7050tx3-48c8 - No
Hardware arista dcs-7050cx3-32s - No
Hardware arista dcs-7050cx3-32s-r - No
Hardware arista dcs-7050cx3m-32s - No
Hardware arista dcs-7050sx3-48c8 - No
Hardware arista dcs-7050sx3-48yc12 - No
Hardware arista dcs-7050sx3-48yc8 - No
Hardware arista dcs-7050sx3-96yc8 - No
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista 7280cr2ak-30 - No
Hardware arista 7280cr2k-60 - No
Hardware arista 7280cr3-32d4 - No
Hardware arista 7280cr3-32p4 - No
Hardware arista 7280cr3-96 - No
Hardware arista 7280cr3k-32d4 - No
Hardware arista 7280cr3k-32p4 - No
Hardware arista 7280cr3k-96 - No
Hardware arista 7280dr3-24 - No
Hardware arista 7280dr3k-24 - No
Hardware arista 7280pr3-24 - No
Hardware arista 7280pr3k-24 - No
Hardware arista 7280r2 - No
Hardware arista 7280r3 - No
Hardware arista 7280sr3-48yc8 - No
Hardware arista 7280sr3k-48yc8 - No
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista 7500r2 - No
Hardware arista 7500r3 - No
Hardware arista 7500r3-24d - No
Hardware arista 7500r3-24p - No
Hardware arista 7500r3-36cq - No
Hardware arista 7500r3k-36cq - No
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista 7800r3-36p - No
Hardware arista 7800r3-48cq - No
Hardware arista 7800r3k-48cq - No
Application arista terminattr < 1.10.11 Yes
Application arista terminattr < 1.16.8 Yes
Application arista terminattr < 1.19.2 Yes
Operating System arista eos ≤ 4.23.11 Yes
Operating System arista eos < 4.24.10 Yes
Operating System arista eos < 4.25.8 Yes
Operating System arista eos < 4.26.6 Yes
Operating System arista eos < 4.27.4 Yes
Hardware arista 7388x5 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For arista's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.