gsd-2021-28505
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
CVE-2021-28505


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-28505",
    "description": "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.",
    "id": "GSD-2021-28505"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-28505"
      ],
      "details": "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.",
      "id": "GSD-2021-28505",
      "modified": "2023-12-13T01:23:29.550349Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "psirt@arista.com",
        "DATE_PUBLIC": "2022-03-29T21:53:00.000Z",
        "ID": "CVE-2021-28505",
        "STATE": "PUBLIC",
        "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."
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "EOS",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "4.26.3M",
                          "version_value": "4.26.0"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "4.27.0F",
                          "version_value": "4.27.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Arista Networks"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "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."
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "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"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-284 Improper Access Control"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073",
            "refsource": "MISC",
            "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
          }
        ]
      },
      "solution": [
        {
          "lang": "eng",
          "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience.\nArtista recommends customers move to the latest version of each release that contains all the fixes listed below.\n\nCVE-2021-28505 has been fixed in the following releases:\n\n4.26.4M and later releases in the 4.26.x train\n4.27.1F and later releases in the 4.27.x train"
        }
      ],
      "source": {
        "advisory": "73",
        "defect": [
          "BUG",
          "609752"
        ],
        "discovery": "INTERNAL"
      },
      "work_around": [
        {
          "lang": "eng",
          "value": "Replace \"vxlan\" IP protocol match with match on IP protocol \"udp\" and Layer 4 destination port for VxLAN encapsulated packets i.e 4789. \u003c br/\u003e If VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number."
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
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                    "cpe23Uri": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "versionEndExcluding": "4.26.4m",
                    "versionStartIncluding": "4.26",
                    "vulnerable": true
                  },
                  {
                    "cpe23Uri": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "versionEndExcluding": "4.27.1f",
                    "versionStartIncluding": "4.27",
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
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                    "cpe23Uri": "cpe:2.3:h:arista:ccs-710p-12:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:h:arista:ccs-710p-16p:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  },
                  {
                    "cpe23Uri": "cpe:2.3:h:arista:ccs-720xp-24y6:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
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                    "cpe_name": [],
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                  },
                  {
                    "cpe23Uri": "cpe:2.3:h:arista:dcs-7050cx3-32s:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
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                    "cpe23Uri": "cpe:2.3:h:arista:dcs-7050cx3m-32s:-:*:*:*:*:*:*:*",
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                    "cpe_name": [],
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                  },
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                    "cpe_name": [],
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                    "cpe_name": [],
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                    "cpe_name": [],
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                  }
                ],
                "operator": "OR"
              }
            ],
            "cpe_match": [],
            "operator": "AND"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@arista.com",
          "ID": "CVE-2021-28505"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-863"
                }
              ]
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Vendor Advisory"
              ],
              "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
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            "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
        }
      },
      "lastModifiedDate": "2022-04-26T17:09Z",
      "publishedDate": "2022-04-14T21:15Z"
    }
  }
}


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