vulnerability
Red Hat: CVE-2020-11080: CVE-2020-11080 nghttp2: overly large SETTINGS frames can lead to DoS (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Jun 3, 2020 | Jun 26, 2020 | Aug 11, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Jun 3, 2020
Added
Jun 26, 2020
Modified
Aug 11, 2025
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.
Solutions
redhat-upgrade-libnghttp2redhat-upgrade-libnghttp2-debuginforedhat-upgrade-libnghttp2-develredhat-upgrade-nghttp2redhat-upgrade-nghttp2-debuginforedhat-upgrade-nghttp2-debugsourceredhat-upgrade-nodejsredhat-upgrade-nodejs-debuginforedhat-upgrade-nodejs-debugsourceredhat-upgrade-nodejs-develredhat-upgrade-nodejs-docsredhat-upgrade-nodejs-full-i18nredhat-upgrade-nodejs-nodemonredhat-upgrade-nodejs-packagingredhat-upgrade-npm
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