FKIE_CVE-2021-28504

Vulnerability from fkie_nvd - Published: 2022-04-01 23:15 - Updated: 2026-06-17 03:46
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected.
References
psirt@arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
arista eos *
arista eos *
arista ccs-710p-12 -
arista ccs-710p-16p -
arista ccs-720xp-24y6 -
arista ccs-720xp-24zy4 -
arista ccs-720xp-48y6 -
arista ccs-720xp-48zc2 -
arista ccs-720xp-96zc2 -
arista ccs-722xpm-48y4 -
arista ccs-722xpm-48zy8 -
arista dcs-7010tx-48 -
arista dcs-7050cx3-32s -
arista dcs-7050cx3m-32s -
arista dcs-7050sx3-48c8 -
arista dcs-7050sx3-48yc12 -
arista dcs-7050sx3-48yc8 -
arista dcs-7050sx3-96yc8 -
arista dcs-7050tx3-48c8 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "EOS",
          "vendor": "Arista Networks",
          "versions": [
            {
              "lessThanOrEqual": "4.26.0",
              "status": "affected",
              "version": "4.26.3F",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "4.27.0",
              "status": "affected",
              "version": "4.27.0F",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@arista.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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              "versionEndExcluding": "4.26.4m",
              "versionStartIncluding": "4.26",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F85F865B-F425-46DD-B9D4-C96AE100F39F",
              "versionEndExcluding": "4.27.1f",
              "versionStartIncluding": "4.27",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
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            },
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              "matchCriteriaId": "AC8C4306-2090-4170-B316-79613AA19392",
              "vulnerable": false
            },
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            },
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              "matchCriteriaId": "7A3886D9-AB47-4E4B-95E6-39E31100FE62",
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            },
            {
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            },
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            },
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            },
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              "vulnerable": false
            },
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              "matchCriteriaId": "9CB43CD4-C96F-483C-B743-3D81C9A65EDF",
              "vulnerable": false
            },
            {
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            },
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            },
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              "matchCriteriaId": "69F1C5CA-19D7-4F40-93EB-97F44DCD5DCB",
              "vulnerable": false
            },
            {
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              "matchCriteriaId": "418E2ED9-B9FC-438D-9F7C-8D6DB7E297AA",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "On Arista Strata family products which have \u201cTCAM profile\u201d feature enabled when Port IPv4 access-list has a rule which matches on \u201cvxlan\u201d as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected."
    },
    {
      "lang": "es",
      "value": "En los productos de la familia Arista Strata que tienen habilitada la funcionalidad \"perfil TCAM\", cuando la lista de acceso IPv4 del puerto presenta una regla que coincide con \"vxlan\" como protocolo, esa regla y las reglas posteriores (reglas declaradas despu\u00e9s de ella en la ACL) no coinciden con el campo de protocolo IP como era esperado"
    }
  ],
  "id": "CVE-2021-28504",
  "lastModified": "2026-06-17T03:46:28.803",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "psirt@arista.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-04-01T23:15:09.380",
  "references": [
    {
      "source": "psirt@arista.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
    }
  ],
  "sourceIdentifier": "psirt@arista.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "psirt@arista.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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