Rapid7 Vulnerability & Exploit Database

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

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

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
06/02/2020
Created
07/24/2020
Added
10/16/2024
Modified
10/17/2024

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-istio
  • oracle-linux-upgrade-istio-citadel
  • oracle-linux-upgrade-istio-galley
  • oracle-linux-upgrade-istio-istioctl
  • oracle-linux-upgrade-istio-mixc
  • oracle-linux-upgrade-istio-mixs
  • oracle-linux-upgrade-istio-node-agent
  • oracle-linux-upgrade-istio-pilot-agent
  • oracle-linux-upgrade-istio-pilot-discovery
  • oracle-linux-upgrade-istio-proxy-init
  • oracle-linux-upgrade-istio-sidecar-injector
  • oracle-linux-upgrade-kata
  • oracle-linux-upgrade-kata-image
  • oracle-linux-upgrade-kata-runtime
  • oracle-linux-upgrade-kernel-uek-container
  • oracle-linux-upgrade-kubeadm
  • oracle-linux-upgrade-kubectl
  • oracle-linux-upgrade-kubelet
  • oracle-linux-upgrade-libnghttp2
  • oracle-linux-upgrade-libnghttp2-devel
  • oracle-linux-upgrade-nghttp2
  • oracle-linux-upgrade-nodejs
  • oracle-linux-upgrade-nodejs-devel
  • oracle-linux-upgrade-nodejs-docs
  • oracle-linux-upgrade-nodejs-full-i18n
  • oracle-linux-upgrade-nodejs-nodemon
  • oracle-linux-upgrade-nodejs-packaging
  • oracle-linux-upgrade-npm
  • oracle-linux-upgrade-olcne-agent
  • oracle-linux-upgrade-olcne-api-server
  • oracle-linux-upgrade-olcnectl
  • oracle-linux-upgrade-olcne-istio-chart
  • oracle-linux-upgrade-olcne-nginx
  • oracle-linux-upgrade-olcne-prometheus-chart
  • oracle-linux-upgrade-olcne-utils

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;