CVE-2021-28501 (GCVE-0-2021-28501)

Vulnerability from cvelistv5 – Published: 2022-01-14 19:04 – Updated: 2024-09-17 03:43
VLAI?
Summary
An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.
Severity ?
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Arista Networks Terminattr Affected: 1.16.2 0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:47:31.788Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Terminattr",
          "vendor": "Arista Networks",
          "versions": [
            {
              "status": "affected",
              "version": "1.16.2 0"
            }
          ]
        }
      ],
      "datePublic": "2022-01-11T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "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:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285 Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-01-14T19:04:48",
        "orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
        "shortName": "Arista"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release. To specifically address CVE-2021-28501 upgrade to TerminAttr v1.16.2 and later releases"
        }
      ],
      "source": {
        "advisory": "71",
        "defect": [
          "BUG",
          "604880"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.",
      "workarounds": [
        {
          "lang": "en",
          "value": "On the affected versions, all vulnerabilities can be mitigated by disabling OpenConfig gNMI/gNOI and OpenConfig RESTCONF and TerminAttr. If use of these agents is required, a hotfix employing a proxy service can be deployed."
        },
        {
          "lang": "en",
          "value": "To mitigate CVE-2021-28501 with the continued use of the affected agents, a hotfix employing a proxy service can be deployed. The proxy is configured behind the gNMI/gNOI or RESTCONF server. The hotfix can be downloaded at https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.i386.swix for 32 bit systems and https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.x86_64.swix for 64 bit systems."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@arista.com",
          "DATE_PUBLIC": "2022-01-11T22:22:00.000Z",
          "ID": "CVE-2021-28501",
          "STATE": "PUBLIC",
          "TITLE": "An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration."
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Terminattr",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "=",
                            "version_name": "1.16.2",
                            "version_value": "0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Arista Networks"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "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:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-285 Improper Authorization"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071",
              "refsource": "MISC",
              "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release. To specifically address CVE-2021-28501 upgrade to TerminAttr v1.16.2 and later releases"
          }
        ],
        "source": {
          "advisory": "71",
          "defect": [
            "BUG",
            "604880"
          ],
          "discovery": "EXTERNAL"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "On the affected versions, all vulnerabilities can be mitigated by disabling OpenConfig gNMI/gNOI and OpenConfig RESTCONF and TerminAttr. If use of these agents is required, a hotfix employing a proxy service can be deployed."
          },
          {
            "lang": "en",
            "value": "To mitigate CVE-2021-28501 with the continued use of the affected agents, a hotfix employing a proxy service can be deployed. The proxy is configured behind the gNMI/gNOI or RESTCONF server. The hotfix can be downloaded at https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.i386.swix for 32 bit systems and https://www.arista.com/en/support/advisories-notices/sa-download/?sa=71-SecurityAdvisory0071Hotfix.x86_64.swix for 64 bit systems."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
    "assignerShortName": "Arista",
    "cveId": "CVE-2021-28501",
    "datePublished": "2022-01-14T19:04:48.898457Z",
    "dateReserved": "2021-03-16T00:00:00",
    "dateUpdated": "2024-09-17T03:43:50.014Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*\", \"versionEndIncluding\": \"1.16.2\", \"matchCriteriaId\": \"5F382CA4-AFFF-4E79-A697-BD8AE14D0742\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.\"}, {\"lang\": \"es\", \"value\": \"Se ha detectado recientemente un problema en Arista EOS donde el uso incorrecto de las API AAA de EOS por parte de los agentes OpenConfig y TerminAttr podr\\u00eda resultar en un acceso sin restricciones al dispositivo para usuarios locales sin configuraci\\u00f3n de contrase\\u00f1a\"}]",
      "id": "CVE-2021-28501",
      "lastModified": "2024-11-21T05:59:47.573",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"psirt@arista.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H\", \"baseScore\": 9.1, \"baseSeverity\": \"CRITICAL\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 5.2}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:M/Au:N/C:C/I:C/A:C\", \"baseScore\": 6.9, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 3.4, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2022-01-14T20:15:10.267",
      "references": "[{\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071\", \"source\": \"psirt@arista.com\", \"tags\": [\"Exploit\", \"Mitigation\", \"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Mitigation\", \"Patch\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "psirt@arista.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"psirt@arista.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-285\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-28501\",\"sourceIdentifier\":\"psirt@arista.com\",\"published\":\"2022-01-14T20:15:10.267\",\"lastModified\":\"2024-11-21T05:59:47.573\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue has recently been discovered in Arista EOS where the incorrect use of EOS\u0027s AAA API\u2019s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.\"},{\"lang\":\"es\",\"value\":\"Se ha detectado recientemente un problema en Arista EOS donde el uso incorrecto de las API AAA de EOS por parte de los agentes OpenConfig y TerminAttr podr\u00eda resultar en un acceso sin restricciones al dispositivo para usuarios locales sin configuraci\u00f3n de contrase\u00f1a\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:C/I:C/A:C\",\"baseScore\":6.9,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.4,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@arista.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-285\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"1.16.2\",\"matchCriteriaId\":\"5F382CA4-AFFF-4E79-A697-BD8AE14D0742\"}]}]}],\"references\":[{\"url\":\"https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071\",\"source\":\"psirt@arista.com\",\"tags\":[\"Exploit\",\"Mitigation\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mitigation\",\"Patch\",\"Vendor Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.