CVE-2021-27794 (GCVE-0-2021-27794)

Vulnerability from cvelistv5 – Published: 2021-08-12 14:25 – Updated: 2024-08-03 21:33
VLAI
Summary
A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST.
CWE
  • Empty Password
Assigner
brocade CNA under the mitre root
CNA scorecard B 75/100 over 70 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n/a Brocade Fabric OS Affected: before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:33:15.935Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0001/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Brocade Fabric OS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Empty Password",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-08-19T09:06:35.000Z",
        "orgId": "87b297d7-335e-4844-9551-11b97995a791",
        "shortName": "brocade"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210819-0001/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "sirt@brocade.com",
          "ID": "CVE-2021-27794",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Brocade Fabric OS",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Empty Password"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552",
              "refsource": "MISC",
              "url": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210819-0001/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210819-0001/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "87b297d7-335e-4844-9551-11b97995a791",
    "assignerShortName": "brocade",
    "cveId": "CVE-2021-27794",
    "datePublished": "2021-08-12T14:25:00.000Z",
    "dateReserved": "2021-02-26T00:00:00.000Z",
    "dateUpdated": "2024-08-03T21:33:15.935Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-27794",
      "date": "2026-10-16",
      "epss": "0.0024",
      "percentile": "0.14106"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "942EE264-4FE0-45C7-A111-0137C18C3962",
                    "versionEndExcluding": "7.4.2h",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7114B4B6-6494-4296-A91D-92116C6312CB",
                    "versionEndExcluding": "8.2.3a",
                    "versionStartIncluding": "8.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:broadcom:fabric_operating_system:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6D7BD6F1-04FE-45C8-9154-70DBDC01A31F",
                    "versionEndExcluding": "9.0.1a",
                    "versionStartIncluding": "9.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST."
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad en el mecanismo de autenticaci\u00f3n de las versiones de Brocade Fabric OS anteriores a Brocade Fabric OS v.9.0.1a, v8.2.3a y v7.4.2h, pod\u00eda permitir a un usuario iniciar sesi\u00f3n con una contrase\u00f1a vac\u00eda y no v\u00e1lida mediante telnet, ssh y REST"
          }
        ],
        "id": "CVE-2021-27794",
        "lastModified": "2024-11-21T05:58:34.790",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 4.6,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-08-12T15:15:07.857",
        "references": [
          {
            "source": "sirt@brocade.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0001/"
          },
          {
            "source": "sirt@brocade.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210819-0001/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552"
          }
        ],
        "sourceIdentifier": "sirt@brocade.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-287"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:23:41+00:00",
      "cve": "CVE-2021-27794",
      "id": "CVE-2021-27794",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-27794",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-27794.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    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.