{"api_version":"1","generated_at":"2026-04-22T19:16:49+00:00","cve":"CVE-2020-11080","urls":{"html":"https://cve.report/CVE-2020-11080","api":"https://cve.report/api/cve/CVE-2020-11080.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-11080","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-11080"},"summary":{"title":"CVE-2020-11080","description":"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.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2020-06-03 23:15:00","updated_at":"2023-11-07 03:14:00"},"problem_types":["CWE-707"],"metrics":[],"references":[{"url":"https://www.debian.org/security/2020/dsa-4696","name":"DSA-4696","refsource":"DEBIAN","tags":["Third Party Advisory"],"title":"Debian -- Security Information -- DSA-4696-1 nodejs","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394","name":"https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"Earlier check for settings flood · nghttp2/nghttp2@f8da73b · 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nghttp2"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"nghttp2","version":{"version_data":[{"version_value":"< 1.41.0"}]}}]},"vendor_name":"nghttp2"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","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."}]},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-707 Improper Enforcement of Message or Data 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20211017 [SECURITY] [DLA 2786-1] nghttp2 security update","url":"https://lists.debian.org/debian-lts-announce/2021/10/msg00011.html"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","refsource":"MISC","name":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20231016 [SECURITY] [DLA 3621-1] nghttp2 security update","url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00023.html"}]},"source":{"advisory":"GHSA-q5wr-xfw9-q7xr","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2020-06-03 23:15:00","lastModifiedDate":"2023-11-07 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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.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"11080","Ordinal":"2","NoteData":"2020-06-03","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"11080","Ordinal":"3","NoteData":"2021-10-17","Type":"Other","Title":"Modified"}]}}}