CVE-2021-28505 (GCVE-0-2021-28505)

Vulnerability from cvelistv5 – Published: 2022-04-14 20:05 – Updated: 2024-09-16 16:58
VLAI
Title
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.
Summary
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-284 - Improper Access Control
Assigner
Arista CNA under the mitre root
CNA scorecard B 87/100 over 89 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Arista Networks EOS Affected: 4.26.3M , ≤ 4.26.0 (custom)
Affected: 4.27.0F , ≤ 4.27.0 (custom)
guessed Create a notification for this product.
Date Public
2022-03-29 00:00
Show details on NVD website
To clipboard 

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                    "criteria": "cpe:2.3:h:arista:dcs-7050sx3-48c8:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "11B7A876-587F-4C51-BE49-C82F6508C536",
                    "vulnerable": false
                  },
                  {
                    "criteria": "cpe:2.3:h:arista:dcs-7050sx3-48yc12:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "EEB629B5-7E62-4972-A288-EF76FFA3E441",
                    "vulnerable": false
                  },
                  {
                    "criteria": "cpe:2.3:h:arista:dcs-7050sx3-48yc8:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "33079D44-2255-4682-A4BC-4B071D8EDCFA",
                    "vulnerable": false
                  },
                  {
                    "criteria": "cpe:2.3:h:arista:dcs-7050sx3-96yc8:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "69F1C5CA-19D7-4F40-93EB-97F44DCD5DCB",
                    "vulnerable": false
                  },
                  {
                    "criteria": "cpe:2.3:h:arista:dcs-7050tx3-48c8:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "418E2ED9-B9FC-438D-9F7C-8D6DB7E297AA",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol."
          },
          {
            "lang": "es",
            "value": "En las plataformas Arista EOS afectadas, si se presenta una regla de coincidencia VXLAN en una lista de acceso IPv4 que es aplicada a la entrada de un puerto/SVI L2 o L3, la regla VXLAN y las reglas ACL posteriores en esa lista de acceso ignorar\u00e1n el protocolo IP especificado"
          }
        ],
        "id": "CVE-2021-28505",
        "lastModified": "2024-11-21T05:59:47.940",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "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": "2022-04-14T21:15:08.427",
        "references": [
          {
            "source": "psirt@arista.com",
            "tags": [
              "Exploit",
              "Vendor Advisory"
            ],
            "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:21:06+00:00",
      "cve": "CVE-2021-28505",
      "id": "CVE-2021-28505",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-28505.json",
      "version": "3"
    }
  }
}



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