{ "id": "CVE-2020-11080", "sourceIdentifier": "security-advisories@github.com", "published": "2020-06-03T23:15:11.073", "lastModified": "2023-10-16T18:15:15.283", "vulnStatus": "Modified", "descriptions": [ { "lang": "en", "value": "In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection." }, { "lang": "es", "value": "En nghttp2 versiones anteriores a 1.41.0, la carga \u00fatil de la trama HTTP/2 SETTINGS demasiado grande causa una denegaci\u00f3n de servicio. El ataque de prueba de concepto involucra a un cliente malicioso que construye una trama SETTINGS con una longitud de 14,400 bytes (2400 entradas de configuraciones individuales) una y otra vez. El ataque causa que la CPU se aumente al 100%. nghttp2 versi\u00f3n v1.41.0 corrige esta vulnerabilidad. Existe una soluci\u00f3n alternativa a esta vulnerabilidad. Implemente la funci\u00f3n nghttp2_on_frame_recv_callback callback, y si la trama es recibida es la trama SETTINGS y el n\u00famero de entradas de configuraci\u00f3n es grande (por ejemplo, mayor a 32), luego desconecte la conexi\u00f3n" } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH" }, "exploitabilityScore": 3.9, "impactScore": 3.6 }, { "source": "security-advisories@github.com", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", 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"security-advisories@github.com", "tags": [ "Patch", "Third Party Advisory" ] }, { "url": "https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394", "source": "security-advisories@github.com", "tags": [ "Patch", "Third Party Advisory" ] }, { "url": "https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr", "source": "security-advisories@github.com", "tags": [ "Patch", "Third Party Advisory" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html", "source": "security-advisories@github.com", "tags": [ "Mailing List", "Third Party Advisory" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html", "source": "security-advisories@github.com" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAC2AA36OTRHKSVM5OV7TTVB3CZIGEFL/", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.debian.org/security/2020/dsa-4696", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.oracle.com//security-alerts/cpujul2021.html", "source": "security-advisories@github.com", "tags": [ "Not Applicable", "Third Party Advisory" ] }, { "url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "source": "security-advisories@github.com", "tags": [ "Patch", "Third Party Advisory" ] }, { "url": "https://www.oracle.com/security-alerts/cpujan2021.html", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.oracle.com/security-alerts/cpujul2020.html", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.oracle.com/security-alerts/cpuoct2020.html", "source": "security-advisories@github.com", "tags": [ "Third Party Advisory" ] } ] }