vulnerability

Oracle Linux: CVE-2020-11080: ELSA-2020-2755: nghttp2 security update (IMPORTANT) (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jun 2, 2020
Added
Jul 22, 2020
Modified
Jun 30, 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.
A resource consumption vulnerability was found in nghttp2. This flaw allows an attacker to repeatedly construct an overly large HTTP/2 SETTINGS frame with a length of 14,400 bytes that causes excessive CPU usage, leading to a denial of service.

Solution(s)

oracle-linux-upgrade-istiooracle-linux-upgrade-istio-citadeloracle-linux-upgrade-istio-galleyoracle-linux-upgrade-istio-istioctloracle-linux-upgrade-istio-mixcoracle-linux-upgrade-istio-mixsoracle-linux-upgrade-istio-node-agentoracle-linux-upgrade-istio-pilot-agentoracle-linux-upgrade-istio-pilot-discoveryoracle-linux-upgrade-istio-proxy-initoracle-linux-upgrade-istio-sidecar-injectororacle-linux-upgrade-kataoracle-linux-upgrade-kata-imageoracle-linux-upgrade-kata-runtimeoracle-linux-upgrade-kernel-uek-containeroracle-linux-upgrade-kubeadmoracle-linux-upgrade-kubectloracle-linux-upgrade-kubeletoracle-linux-upgrade-libnghttp2oracle-linux-upgrade-libnghttp2-develoracle-linux-upgrade-nghttp2oracle-linux-upgrade-nodejsoracle-linux-upgrade-nodejs-develoracle-linux-upgrade-nodejs-docsoracle-linux-upgrade-nodejs-full-i18noracle-linux-upgrade-nodejs-nodemonoracle-linux-upgrade-nodejs-packagingoracle-linux-upgrade-npmoracle-linux-upgrade-olcne-agentoracle-linux-upgrade-olcne-api-serveroracle-linux-upgrade-olcnectloracle-linux-upgrade-olcne-istio-chartoracle-linux-upgrade-olcne-nginxoracle-linux-upgrade-olcne-prometheus-chartoracle-linux-upgrade-olcne-utils
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