CVE-2021-34431

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{"affected": [{"affectedData": [{"product": "Eclipse Mosquitto", "vendor": "The Eclipse Foundation", "versions": [{"lessThan": "unspecified", "status": "affected", "version": "1.6", "versionType": "custom"}, {"lessThanOrEqual": "2.0.10", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "emo@eclipse.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*", "matchCriteriaId": "1509006C-01A1-4D8F-81AF-B02F11464F06", "versionEndIncluding": "2.0.10", "versionStartIncluding": "1.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker."}, {"lang": "es", "value": "En Eclipse Mosquitto versiones 1.6 hasta 2.0.10, si un cliente autenticado que se hab\u00eda conectado con MQTT versi\u00f3n v5 enviaba un mensaje CONNECT dise\u00f1ado al broker, ocurrir\u00eda una p\u00e9rdida de memoria, que podr\u00eda ser usada para proporcionar un ataque DoS contra el broker"}], "id": "CVE-2021-34431", "lastModified": "2026-06-17T03:55:51.327", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-22T14:15:08.050", "references": [{"source": "emo@eclipse.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191"}], "sourceIdentifier": "emo@eclipse.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "emo@eclipse.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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