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CVE-2020-11080

Estado: ModificadaAlta (7.5)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (10)

Debian — Debian LinuxFedoraproject — FedoraNghttp2 — Nghttp2Nodejs — Node.jsOpensuse — LeapOracle — Banking Extensibility WorkbenchOracle — Blockchain PlatformOracle — Enterprise Communications BrokerOracle — GraalvmOracle — Mysql

CWE

Referencias

JSON original (NVD)

Mostrar
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      "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."
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      "value": "En nghttp2 versiones anteriores a 1.41.0, la carga útil de la trama HTTP/2 SETTINGS demasiado grande causa una denegación 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 versión v1.41.0 corrige esta vulnerabilidad. Existe una solución alternativa a esta vulnerabilidad. Implemente la función nghttp2_on_frame_recv_callback callback, y si la trama es recibida es la trama SETTINGS y el número de entradas de configuración es grande (por ejemplo, mayor a 32), luego desconecte la conexión"
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