Vulnerability-Lookup

VAR-202202-1218

Vulnerability from variot - Updated: 2023-12-18 13:22

An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability. Sealevel Systems, Inc. Used to remotely monitor and control the status of the actual I/O process. A buffer error vulnerability exists in Sealevel Systems SeaConnect 370W, which is caused by the product's OTA update task function not effectively limiting memory boundaries. An attacker can cause an out-of-bounds write and cause a denial of service through a specially crafted network packet

Show details on source website

JSON

To clipboard

{
  "@context": {
    "@vocab": "https://www.variotdbs.pl/ref/VARIoTentry#",
    "affected_products": {
      "@id": "https://www.variotdbs.pl/ref/affected_products"
    },
    "configurations": {
      "@id": "https://www.variotdbs.pl/ref/configurations"
    },
    "credits": {
      "@id": "https://www.variotdbs.pl/ref/credits"
    },
    "cvss": {
      "@id": "https://www.variotdbs.pl/ref/cvss/"
    },
    "description": {
      "@id": "https://www.variotdbs.pl/ref/description/"
    },
    "exploit_availability": {
      "@id": "https://www.variotdbs.pl/ref/exploit_availability/"
    },
    "external_ids": {
      "@id": "https://www.variotdbs.pl/ref/external_ids/"
    },
    "iot": {
      "@id": "https://www.variotdbs.pl/ref/iot/"
    },
    "iot_taxonomy": {
      "@id": "https://www.variotdbs.pl/ref/iot_taxonomy/"
    },
    "patch": {
      "@id": "https://www.variotdbs.pl/ref/patch/"
    },
    "problemtype_data": {
      "@id": "https://www.variotdbs.pl/ref/problemtype_data/"
    },
    "references": {
      "@id": "https://www.variotdbs.pl/ref/references/"
    },
    "sources": {
      "@id": "https://www.variotdbs.pl/ref/sources/"
    },
    "sources_release_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_release_date/"
    },
    "sources_update_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_update_date/"
    },
    "threat_type": {
      "@id": "https://www.variotdbs.pl/ref/threat_type/"
    },
    "title": {
      "@id": "https://www.variotdbs.pl/ref/title/"
    },
    "type": {
      "@id": "https://www.variotdbs.pl/ref/type/"
    }
  },
  "@id": "https://www.variotdbs.pl/vuln/VAR-202202-1218",
  "affected_products": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/affected_products#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "model": "seaconnect 370w",
        "scope": "eq",
        "trust": 1.0,
        "vendor": "sealevel",
        "version": "1.3.34"
      },
      {
        "model": "seaconnect 370w",
        "scope": "eq",
        "trust": 0.8,
        "vendor": "sealevel",
        "version": null
      },
      {
        "model": "seaconnect 370w",
        "scope": "eq",
        "trust": 0.8,
        "vendor": "sealevel",
        "version": "seaconnect 370w  firmware  1.3.34"
      },
      {
        "model": "systems seaconnect 370w",
        "scope": "eq",
        "trust": 0.6,
        "vendor": "sealevel",
        "version": "v1.3.34"
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      }
    ]
  },
  "configurations": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/configurations#",
      "children": {
        "@container": "@list"
      },
      "cpe_match": {
        "@container": "@list"
      },
      "data": {
        "@container": "@list"
      },
      "nodes": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:o:sealevel:seaconnect_370w_firmware:1.3.34:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:h:sealevel:seaconnect_370w:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  }
                ],
                "operator": "OR"
              }
            ],
            "cpe_match": [],
            "operator": "AND"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      }
    ]
  },
  "credits": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/credits#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "Discovered by Francesco Benvenuto and Matt Wiseman of Cisco Talos.",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ],
    "trust": 0.6
  },
  "cve": "CVE-2021-21971",
  "cvss": {
    "@context": {
      "cvssV2": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV2#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV2"
      },
      "cvssV3": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV3#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV3/"
      },
      "severity": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/cvss/severity#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/severity"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "cvssV2": [
          {
            "acInsufInfo": false,
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "NVD",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 8.6,
            "impactScore": 2.9,
            "integrityImpact": "PARTIAL",
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "severity": "MEDIUM",
            "trust": 1.0,
            "userInteractionRequired": false,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          {
            "acInsufInfo": null,
            "accessComplexity": "Medium",
            "accessVector": "Network",
            "authentication": "None",
            "author": "NVD",
            "availabilityImpact": "None",
            "baseScore": 4.3,
            "confidentialityImpact": "None",
            "exploitabilityScore": null,
            "id": "CVE-2021-21971",
            "impactScore": null,
            "integrityImpact": "Partial",
            "obtainAllPrivilege": null,
            "obtainOtherPrivilege": null,
            "obtainUserPrivilege": null,
            "severity": "Medium",
            "trust": 0.8,
            "userInteractionRequired": null,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "CNVD",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 8.6,
            "id": "CNVD-2022-10701",
            "impactScore": 2.9,
            "integrityImpact": "PARTIAL",
            "severity": "MEDIUM",
            "trust": 0.6,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          }
        ],
        "cvssV3": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "author": "NVD",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 2.2,
            "impactScore": 3.6,
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 1.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "author": "talos-cna@cisco.com",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "exploitabilityScore": 2.2,
            "impactScore": 1.4,
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 1.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          },
          {
            "attackComplexity": "High",
            "attackVector": "Network",
            "author": "NVD",
            "availabilityImpact": "None",
            "baseScore": 5.9,
            "baseSeverity": "Medium",
            "confidentialityImpact": "None",
            "exploitabilityScore": null,
            "id": "CVE-2021-21971",
            "impactScore": null,
            "integrityImpact": "High",
            "privilegesRequired": "None",
            "scope": "Unchanged",
            "trust": 0.8,
            "userInteraction": "None",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.0"
          }
        ],
        "severity": [
          {
            "author": "NVD",
            "id": "CVE-2021-21971",
            "trust": 1.8,
            "value": "MEDIUM"
          },
          {
            "author": "talos-cna@cisco.com",
            "id": "CVE-2021-21971",
            "trust": 1.0,
            "value": "LOW"
          },
          {
            "author": "CNVD",
            "id": "CNVD-2022-10701",
            "trust": 0.6,
            "value": "MEDIUM"
          },
          {
            "author": "CNNVD",
            "id": "CNNVD-202202-100",
            "trust": 0.6,
            "value": "MEDIUM"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "description": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/description#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability. Sealevel Systems, Inc. Used to remotely monitor and control the status of the actual I/O process. \nA buffer error vulnerability exists in Sealevel Systems SeaConnect 370W, which is caused by the product\u0027s OTA update task function not effectively limiting memory boundaries. An attacker can cause an out-of-bounds write and cause a denial of service through a specially crafted network packet",
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ],
    "trust": 2.7
  },
  "external_ids": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/external_ids#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "db": "NVD",
        "id": "CVE-2021-21971",
        "trust": 3.8
      },
      {
        "db": "TALOS",
        "id": "TALOS-2021-1397",
        "trust": 2.4
      },
      {
        "db": "TALOS",
        "id": "TALOS-2021-1406",
        "trust": 2.2
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714",
        "trust": 0.8
      },
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701",
        "trust": 0.6
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100",
        "trust": 0.6
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "id": "VAR-202202-1218",
  "iot": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/iot#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": true,
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      }
    ],
    "trust": 1.29746375
  },
  "iot_taxonomy": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/iot_taxonomy#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "category": [
          "IoT"
        ],
        "sub_category": null,
        "trust": 0.6
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      }
    ]
  },
  "last_update_date": "2023-12-18T13:22:32.486000Z",
  "patch": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/patch#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "title": "Top\u00a0Page",
        "trust": 0.8,
        "url": "https://www.sealevel.com/"
      },
      {
        "title": "Patch for Sealevel Systems SeaConnect 370W Buffer Overflow Vulnerability (CNVD-2022-10701)",
        "trust": 0.6,
        "url": "https://www.cnvd.org.cn/patchinfo/show/319851"
      },
      {
        "title": "Sealevel Systems SeaConnect 370W Buffer error vulnerability fix",
        "trust": 0.6,
        "url": "http://www.cnnvd.org.cn/web/xxk/bdxqbyid.tag?id=181521"
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "problemtype_data": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/problemtype_data#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "problemtype": "CWE-787",
        "trust": 1.0
      },
      {
        "problemtype": "Out-of-bounds writing (CWE-787) [NVD evaluation ]",
        "trust": 0.8
      }
    ],
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      }
    ]
  },
  "references": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/references#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "trust": 3.0,
        "url": "https://talosintelligence.com/vulnerability_reports/talos-2021-1397"
      },
      {
        "trust": 2.2,
        "url": "https://talosintelligence.com/vulnerability_reports/talos-2021-1406"
      },
      {
        "trust": 1.4,
        "url": "https://nvd.nist.gov/vuln/detail/cve-2021-21971"
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "sources": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "sources_release_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_release_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2022-02-16T00:00:00",
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "date": "2023-04-28T00:00:00",
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "date": "2022-02-04T23:15:10.830000",
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "date": "2022-02-01T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "sources_update_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_update_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2022-02-16T00:00:00",
        "db": "CNVD",
        "id": "CNVD-2022-10701"
      },
      {
        "date": "2023-04-28T08:27:00",
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      },
      {
        "date": "2022-07-29T16:29:14.547000",
        "db": "NVD",
        "id": "CVE-2021-21971"
      },
      {
        "date": "2022-02-17T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ]
  },
  "threat_type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/threat_type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "remote",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ],
    "trust": 0.6
  },
  "title": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/title#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "Sealevel\u00a0Systems,\u00a0Inc.\u00a0SeaConnect\u00a0370W\u00a0 Out-of-bounds write vulnerability in",
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2022-004714"
      }
    ],
    "trust": 0.8
  },
  "type": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/type#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "buffer error",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202202-100"
      }
    ],
    "trust": 0.6
  }
}

CVE-2021-21971 (GCVE-0-2021-21971)

Vulnerability from cvelistv5 – Published: 2022-02-04 22:29 – Updated: 2025-04-15 19:11

Summary

Severity

3.7 (Low)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-15 18:19 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

talos mitre root

References

1 reference

URL	Tags
https://talosintelligence.com/vulnerability_repor…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Sealevel	Affected: Sealevel Systems, Inc. SeaConnect 370W v1.3.34

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:30:23.656Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-21971",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-15T18:19:15.271623Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-15T19:11:19.375Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Sealevel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Sealevel Systems, Inc. SeaConnect 370W v1.3.34"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-02-04T22:29:02.000Z",
        "orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
        "shortName": "talos"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "talos-cna@cisco.com",
          "ID": "CVE-2021-21971",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Sealevel",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Sealevel Systems, Inc. SeaConnect 370W v1.3.34"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability."
            }
          ]
        },
        "impact": {
          "cvss": {
            "baseScore": 3.7,
            "baseSeverity": "Low",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-787: Out-of-bounds Write"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406",
              "refsource": "MISC",
              "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
    "assignerShortName": "talos",
    "cveId": "CVE-2021-21971",
    "datePublished": "2022-02-04T22:29:02.000Z",
    "dateReserved": "2021-01-04T00:00:00.000Z",
    "dateUpdated": "2025-04-15T19:11:19.375Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.