CVE-2021-34982

{"id": "CVE-2021-34982", "cveTags": [], "metrics": {"cvssMetricV30": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2024-05-07T23:15:13.400", "references": [{"url": "https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159", "tags": ["Vendor Advisory"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1274/", "tags": ["Third Party Advisory"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1274/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "description": [{"lang": "en", "value": "CWE-121"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the httpd service, which listens on TCP port 80 by default. When parsing the strings file, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.\n\n\n\n\n. Was ZDI-CAN-13709."}, {"lang": "es", "value": "Vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo de desbordamiento de b\u00fafer en la regi\u00f3n stack de la memoria httpd de m\u00faltiples enrutadores de NETGEAR. Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar c\u00f3digo arbitrario en instalaciones afectadas de m\u00faltiples enrutadores NETGEAR. No se requiere autenticaci\u00f3n para aprovechar esta vulnerabilidad. La falla espec\u00edfica existe dentro del servicio httpd, que escucha en el puerto TCP 80 de forma predeterminada. Al analizar el archivo de cadenas, el proceso no valida correctamente la longitud de los datos proporcionados por el usuario antes de copiarlos en un b\u00fafer basado en pila de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\u00f3digo en el contexto de la ra\u00edz. Era ZDI-CAN-13709."}], "lastModified": "2025-08-14T01:41:19.343", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:netgear:dc112a_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3B4ECB05-E606-439C-9B67-DB5042FCD50E", "versionEndExcluding": "1.0.0.62"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:netgear:dc112a:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F87FFC46-137D-45B8-B437-F15565FB33D0"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:netgear:ex3700_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A65EE9FC-A015-4D92-8DA3-40C8594D843D", "versionEndExcluding": "1.0.0.94"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:netgear:ex3700:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "CDAA5899-B73C-4690-853E-B5400F034BE1"}], "operator": "OR"}], "operator": "AND"}, {"nodes": 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