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FKIE_CVE-2021-28510

Vulnerability from fkie_nvd - Published: 2023-01-26 21:15 - Updated: 2026-06-17 03:46
Summary
For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable.
Impacted products
Vendor Product Version
arista eos *
arista eos *
arista eos *
arista eos *
arista eos *
arista 7020r -
arista 7050cx3-32s -
arista 7050cx3m-32s -
arista 7050qx-32s -
arista 7050qx2-32s -
arista 7050sx-128 -
arista 7050sx-64 -
arista 7050sx-72q -
arista 7050sx2-128 -
arista 7050sx2-72q -
arista 7050sx3-48c8 -
arista 7050sx3-48yc -
arista 7050sx3-48yc12 -
arista 7050sx3-48yc8 -
arista 7050sx3-96yc8 -
arista 7050tx-48 -
arista 7050tx-64 -
arista 7050tx-72q -
arista 7050tx2-128 -
arista 7050tx3-48c8 -
arista 7060cx-32s -
arista 7060cx2-32s -
arista 7060dx4-32 -
arista 7060px4-32 -
arista 7060sx2-48yc6 -
arista 7150s-24 -
arista 7150s-52 -
arista 7150s-64 -
arista 7150sc-24 -
arista 7150sc-64 -
arista 7170-32c -
arista 7170-32cd -
arista 7170-64c -
arista 720xp-24y6 -
arista 720xp-24zy4 -
arista 720xp-48y6 -
arista 720xp-48zc2 -
arista 720xp-96zc2 -
arista 7250qx-64 -
arista 7260cx -
arista 7260cx3 -
arista 7260cx3-64 -
arista 7260qx -
arista 7280e -
arista 7280r -
arista 7280r2 -
arista 7280r3 -
arista 7280sr3-48yc8 -
arista 7280sr3k-48yc8 -
arista 7300x-32q -
arista 7300x-64s -
arista 7300x-64t -
arista 7300x3-32c -
arista 7300x3-48yc4 -
arista 7304x3 -
arista 7308x3 -
arista 7320x-32c -
arista 7324x -
arista 7328x -
arista 7368x4 -
arista 7500e -
arista 7500r -
arista 7500r2 -
arista 7500r3 -
arista 7500r3-24d -
arista 7500r3-24p -
arista 7500r3-36cq -
arista 7500r3k-36cq -
arista 7504r3 -
arista 7508r3 -
arista 7512r3 -
arista 7800r3-36p -
arista 7800r3-48cq -
arista 7800r3k-48cq -
arista 7804r3 -
arista 7808r3 -

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "EOS",
          "vendor": "Arista Networks",
          "versions": [
            {
              "status": "affected",
              "version": "4.22"
            },
            {
              "lessThanOrEqual": "4.27.0",
              "status": "affected",
              "version": "4.27.1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.26.0",
              "status": "affected",
              "version": "4.26.4",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.25.0",
              "status": "affected",
              "version": "4.25.6",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.24.0",
              "status": "affected",
              "version": "4.24.8",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.23.0",
              "status": "affected",
              "version": "4.23.10",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@arista.com"
    }
  ],
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              "matchCriteriaId": "55AE2A1C-A4FD-423B-A77E-2E24C2310A6A",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7512r3:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C4B0D708-B426-4CA1-BE87-08BD14B7EACE",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7800r3-36p:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "D19E86BF-AA91-4262-8EF9-B7FC48C6F3F8",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7800r3-48cq:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "58443CDE-33D8-4460-A861-CDC07431AA22",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7800r3k-48cq:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "64BE8C68-FE98-4162-A3D3-54494D5444F5",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7804r3:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A54F3D32-5A07-4791-90BF-96BD8A24C2F6",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:arista:7808r3:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "2F078B04-2DA0-4A4B-BB1A-408DC14CB61F",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "For certain systems running EOS, a Precision Time Protocol (PTP) packet of a management/signaling message with an invalid Type-Length-Value (TLV) causes the PTP agent to restart. Repeated restarts of the service will make the service unavailable."
    },
    {
      "lang": "es",
      "value": "Para ciertos sistemas que ejecutan EOS, un paquete de protocolo de tiempo de precisi\u00f3n (PTP) de un mensaje de administraci\u00f3n/se\u00f1alizaci\u00f3n con un valor de tipo, longitud y valor (TLV) no v\u00e1lido hace que el agente PTP se reinicie. Los reinicios repetidos del servicio har\u00e1n que el servicio no est\u00e9 disponible."
    }
  ],
  "id": "CVE-2021-28510",
  "lastModified": "2026-06-17T03:46:29.730",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "psirt@arista.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-28510",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-01T18:44:12.691655Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-01-26T21:15:22.147",
  "references": [
    {
      "source": "psirt@arista.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/15439-security-advisory-0076"
    }
  ],
  "sourceIdentifier": "psirt@arista.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "psirt@arista.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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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Detection rules are retrieved from Rulezet.

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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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