CVE-2021-28509 (GCVE-0-2021-28509)
Vulnerability from cvelistv5 – Published: 2022-05-26 19:50 – Updated: 2024-09-16 20:32
VLAI
EPSS
VEX
Title
TerminAttr streams MACsec sensitive data in clear text to other authorized users in CVP
Summary
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.
Severity
6.1 (Medium)
CWE
- CWE-255 - Credentials Management
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Arista Networks | Arista EOS |
Affected:
4.23 , ≤ 4.23.11
(custom)
Affected: 4.24 , ≤ 4.24.9 (custom) Affected: 4.25 , ≤ 4.25.7 (custom) Affected: 4.26 , ≤ 4.26.5 (custom) Affected: 4.27 , ≤ 4.27.3 (custom) |
guessed | |
| Arista Networks | Arista TerminAttr |
Affected:
v1.10 , ≤ v1.10.10
(custom)
Affected: v1.16 , ≤ v1.16.7 (custom) Affected: v1.19 , ≤ v1.19.1 (custom) |
guessed |
Date Public
2022-05-25 00:00
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"lang": "en",
"value": "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."
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"value": "Este aviso documenta el impacto de una vulnerabilidad encontrada internamente en los protocolos de transporte TerminAttr y OpenConfig del agente de telemetr\u00eda de transmisi\u00f3n de estados de Arista EOS. El impacto de esta vulnerabilidad es que, en determinadas condiciones, TerminAttr podr\u00eda filtrar datos confidenciales MACsec en texto sin cifrar en CVP a otros usuarios autorizados, lo que podr\u00eda causar que el tr\u00e1fico MACsec sea descifrado o modificado por otros usuarios autorizados en el dispositivo"
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"exploitabilityScore": 3.9,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 0.9,
"impactScore": 5.2,
"source": "psirt@arista.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 0.9,
"impactScore": 5.2,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-05-26T20:15:08.500",
"references": [
{
"source": "psirt@arista.com",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077"
}
],
"sourceIdentifier": "psirt@arista.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-255"
}
],
"source": "psirt@arista.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-319"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T14:21:05+00:00",
"cve": "CVE-2021-28509",
"id": "CVE-2021-28509",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "TerminAttr streams MACsec sensitive data in clear text to other authorized users in CVP",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-28509.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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