CVE-2021-21959 - Vulnerability Details - OpenCVE

A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00306.

Exploitation poc

Automatable no

Technical Impact partial

Vendors	Products
Sealevel	Seaconnect 370w Seaconnect 370w Firmware

Configuration 1 [-]

AND

cpe:2.3:o:sealevel:seaconnect_370w_firmware:1.3.34:*:*:*:*:*:*:*

cpe:2.3:h:sealevel:seaconnect_370w:-:*:*:*:*:*:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-9130	A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388

History

Tue, 15 Apr 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: talos

Published: 2022-02-04T22:29:09.000Z

Updated: 2025-04-15T19:10:31.605Z

Reserved: 2021-01-04T00:00:00.000Z

Link: CVE-2021-21959

Vulnrichment

Updated: 2024-08-03T18:30:23.644Z

NVD

Status : Modified

Published: 2022-02-04T23:15:10.443

Modified: 2024-11-21T05:49:19.250

Link: CVE-2021-21959

Redhat

No data.

OpenCVE Enrichment

No data.

{"containers": {"cna": {"affected": [{"product": "Sealevel", "vendor": "n/a", "versions": [{"status": "affected", "version": "Sealevel Systems, Inc. SeaConnect 370W v1.3.34"}]}], "descriptions": [{"lang": "en", "value": "A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality."}], "metrics": [{"cvssV3_0": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "CWE-295: Improper Certificate Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-02-04T22:29:09.000Z", "orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "shortName": "talos"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "talos-cna@cisco.com", "ID": "CVE-2021-21959", "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": "A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality."}]}, "impact": {"cvss": {"baseScore": 7.7, "baseSeverity": "High", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-295: Improper Certificate Validation"}]}]}, "references": {"reference_data": [{"name": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388", "refsource": "MISC", "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:30:23.644Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-04-15T18:19:09.839388Z", "id": "CVE-2021-21959", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-15T19:10:31.605Z"}}]}, "cveMetadata": {"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "assignerShortName": "talos", "cveId": "CVE-2021-21959", "datePublished": "2022-02-04T22:29:09.000Z", "dateReserved": "2021-01-04T00:00:00.000Z", "dateUpdated": "2025-04-15T19:10:31.605Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"containers": {"cna": {"affected": [{"product": "Sealevel", "vendor": "n/a", "versions": [{"status": "affected", "version": "Sealevel Systems, Inc. SeaConnect 370W v1.3.34"}]}], "descriptions": [{"lang": "en", "value": "A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality."}], "metrics": [{"cvssV3_0": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "CWE-295: Improper Certificate Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-02-04T22:29:09.000Z", "orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "shortName": "talos"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "talos-cna@cisco.com", "ID": "CVE-2021-21959", "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": "A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality."}]}, "impact": {"cvss": {"baseScore": 7.7, "baseSeverity": "High", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-295: Improper Certificate Validation"}]}]}, "references": {"reference_data": [{"name": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388", "refsource": "MISC", "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:30:23.644Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}]}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-21959", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-04-15T18:19:09.839388Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-15T18:19:12.520Z"}}]}, "cveMetadata": {"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "assignerShortName": "talos", "cveId": "CVE-2021-21959", "datePublished": "2022-02-04T22:29:09.000Z", "dateReserved": "2021-01-04T00:00:00.000Z", "dateUpdated": "2025-04-15T19:10:31.605Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:sealevel:seaconnect_370w_firmware:1.3.34:*:*:*:*:*:*:*", "matchCriteriaId": "06014E46-DFB2-45C7-99FD-972EBCCC5FD3", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:sealevel:seaconnect_370w:-:*:*:*:*:*:*:*", "matchCriteriaId": "D8CC996D-F36A-4B26-BD50-68F88D24D001", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "descriptions": [{"lang": "en", "value": "A misconfiguration exists in the MQTTS functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This misconfiguration significantly simplifies a man-in-the-middle attack, which directly leads to control of device functionality."}, {"lang": "es", "value": "Se presenta un error de configuraci\u00f3n en la funcionalidad MQTTS de Sealevel Systems, Inc. SeaConnect 370W versi\u00f3n v1.3.34. Esta configuraci\u00f3n err\u00f3nea simplifica significativamente un ataque de tipo man-in-the-middle, que conlleva directamente a un control de la funcionalidad device"}], "id": "CVE-2021-21959", "lastModified": "2024-11-21T05:49:19.250", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 5.5, "source": "talos-cna@cisco.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-02-04T23:15:10.443", "references": [{"source": "talos-cna@cisco.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1388"}], "sourceIdentifier": "talos-cna@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "talos-cna@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}