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OpenAdvisories
Low · 3.7 CVE-2020-11080 EUVD-2020-3444

Denial of service in nghttp2

Published Jun 3, 2020 · Updated Jun 9, 2025 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
nghttp2 nghttp2 < 1.41.0 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 nghttp2 1.41.0-1 —
Debian 14 nodejs 10.21.0~dfsg-1 —
Debian 13 nghttp2 1.41.0-1 —
Debian 13 nodejs 10.21.0~dfsg-1 —
Debian 12 nghttp2 1.41.0-1 —
Debian 12 nodejs 10.21.0~dfsg-1 —
Debian 10 nghttp2 1.36.0-2+deb10u2 DLA-3621-1
Debian 10 nodejs 10.21.0~dfsg-1~deb10u1 DSA-4696-1
Debian 9 nghttp2 1.18.1-1+deb9u2 DLA-2786-1
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS nghttp2 1.40.0-1ubuntu0.1 USN-6142-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 18.04 LTS nghttp2 1.30.0-1ubuntu1+esm1 USN-6142-1
Ubuntu Pro 16.04 LTS nghttp2 1.7.1-1ubuntu0.1~esm1 USN-6142-1
ReleasePackageFixed inAdvisory
RHEL 8 nghttp2 +2 1.33.0-3.el8_2.1 RHSA-2020:2755
RHEL 8 nodejs +3 1:10.21.0-3.module+el8.2.0+7071+d2377ea3 RHSA-2020:2852, RHSA-2020:2848
RHEL 8 nodejs-nodemon 1.18.3-1.module+el8.1.0+3369+37ae6a45 RHSA-2020:2852, RHSA-2020:2848
RHEL 8 nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45 RHSA-2020:2852, RHSA-2020:2848
RHEL 8 npm 1:6.14.4-1.10.21.0.3.module+el8.2.0+7071+d2377ea3 RHSA-2020:2852, RHSA-2020:2848
RHEL 3 httpd24-nghttp2 +2 1.7.1-8.el6.1 RHSA-2020:2784
RHEL 3 rh-nodejs10-nodejs +2 10.21.0-3.el7 RHSA-2020:3084
RHEL 3 rh-nodejs10-npm 6.14.4-10.21.0.3.el7 RHSA-2020:3084
RHEL 3 rh-nodejs12-nodejs +2 12.18.2-1.el7 RHSA-2020:2895
RHEL 3 rh-nodejs12-npm 6.14.5-12.18.2.1.el7 RHSA-2020:2895
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Red Hat Service Mesh 1 servicemesh-proxy 1.0.10-3.el8 RHSA-2020:2524, RHSA-2020:2523
RHEL 8.1 EUS nghttp2 +2 1.33.0-3.el8_1.1 RHSA-2020:2823
RHEL 8.1 EUS nodejs +3 1:10.21.0-3.module+el8.1.0+7070+fe09e702 RHSA-2020:2849, RHSA-2020:2847
RHEL 8.1 EUS nodejs-nodemon 1.18.3-1.module+el8.1.0+3369+37ae6a45 RHSA-2020:2849, RHSA-2020:2847
RHEL 8.1 EUS nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45 RHSA-2020:2849, RHSA-2020:2847
RHEL 8.1 EUS npm 1:6.14.4-1.10.21.0.3.module+el8.1.0+7070+fe09e702 RHSA-2020:2849, RHSA-2020:2847
RHEL 8.0 E4S nghttp2 +1 1.33.0-1.el8_0.2 RHSA-2020:2850
RHEL 8.0 E4S nodejs +3 1:10.21.0-3.module+el8.0.0+7067+054302d1 RHSA-2020:3042
RHEL 8.0 E4S nodejs-nodemon 1.18.3-1.module+el8+2632+6c5111ed RHSA-2020:3042
RHEL 8.0 E4S nodejs-packaging 17-3.module+el8+2873+aa7dfd9a RHSA-2020:3042
RHEL 8.0 E4S npm 1:6.14.4-1.10.21.0.3.module+el8.0.0+7067+054302d1 RHSA-2020:3042
Red Hat JBoss Core Services 1 jbcs-httpd24-curl +2 7.64.1-36.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-httpd +6 2.4.37-57.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_cluster-native 1.3.14-4.Final_redhat_2.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_http2 1.15.7-3.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_jk +2 1.2.48-4.redhat_1.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_md 1:2.0.8-24.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_security 2.9.2-51.GA.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-mod_ssl +1 1:2.4.37-57.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-nghttp2 +1 1.39.2-25.jbcs.el6 RHSA-2020:2644
Red Hat JBoss Core Services 1 jbcs-httpd24-openssl-pkcs11 0.4.10-7.jbcs.el7 RHSA-2020:2644

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 nghttp2 +2 1.33.0-3.el8_2.1 ALSA-2020:2755
AlmaLinux 8 nodejs-nodemon 1.18.3-1.module_el8.3.0+2023+d2377ea3 ALSA-2020:2852, ALSA-2020:2848
AlmaLinux 8 nodejs-packaging 17-3.module_el8.3.0+2023+d2377ea3 ALSA-2020:2852, ALSA-2020:2848

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 nghttp2 1.33.0-3.el8_3.1 RLSA-2020:2755
Rocky Linux 8 nodejs-nodemon 1.18.3-1.module+el8.3.0+101+f84c7154 RLSA-2020:2852, RLSA-2020:2848
Rocky Linux 8 nodejs-packaging 17-3.module+el8.3.0+101+f84c7154 RLSA-2020:2852, RLSA-2020:2848
ReleasePackageFixed inAdvisory
SLES 15 SP2 nghttp2 1.40.0-3.5.1 SUSE-SU-2021:0930-1
SLES 15 SP2 nodejs10 10.21.0-1.21.1 SUSE-SU-2020:1568-1
SLES 15 SP2 nodejs8 8.17.0-10.3.1 SUSE-SU-2020:2800-1
SLES 15 SP1 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLES 15 SP1 nodejs10 10.21.0-1.21.1 SUSE-SU-2020:1568-1
SLES 15 SP1 nodejs8 8.17.0-3.32.1 SUSE-SU-2020:1576-1
SLES 15 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLES 15 nodejs10 10.21.0-1.21.1 SUSE-SU-2020:1568-1
SLES 15 nodejs8 8.17.0-3.32.1 SUSE-SU-2020:1576-1
SLES 12 SP5 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES 12 SP4 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
Show 22 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP3 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES 12 SP2 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES 12 nodejs10 10.21.0-1.24.1 SUSE-SU-2020:1575-1
SLES 12 nodejs12 12.18.0-1.14.1 SUSE-SU-2020:1606-1
SLES for SAP 15 SP1 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLES for SAP 15 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLES for SAP 15 nodejs10 10.21.0-1.21.1 SUSE-SU-2020:1568-1
SLES for SAP 15 nodejs8 8.17.0-3.32.1 SUSE-SU-2020:1576-1
SLES for SAP 12 SP5 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES for SAP 12 SP4 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES for SAP 12 SP3 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLES for SAP 12 SP2 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SLE Micro 5.0 nghttp2 1.40.0-3.5.1 SUSE-SU-2021:0930-1
SLE HPC 15 SP1 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLE HPC 15 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SLE HPC 15 nodejs10 10.21.0-1.21.1 SUSE-SU-2020:1568-1
SLE HPC 15 nodejs8 8.17.0-3.32.1 SUSE-SU-2020:1576-1
SUSE OpenStack Cloud Crowbar 9 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE OpenStack Cloud Crowbar 8 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE OpenStack Cloud 9 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE OpenStack Cloud 8 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE OpenStack Cloud 7 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE Manager Server 4.0 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SUSE Manager Retail Branch Server 4.0 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SUSE Manager Proxy 4.0 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
SUSE HPE Helion OpenStack 8 nghttp2 1.39.2-3.5.1 SUSE-SU-2021:0932-1
SUSE Enterprise Storage 6 nghttp2 1.40.0-3.11.1 SUSE-SU-2021:0931-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed nghttp2 1.43.0-1.6 openSUSE-SU-2024:11091-1
openSUSE Tumbleweed nodejs14 14.17.5-1.2 openSUSE-SU-2024:11096-1
openSUSE Leap 15.2 nghttp2 +1 1.40.0-lp152.2.6.1 openSUSE-SU-2021:0468-1
openSUSE Leap 15.1 nodejs8 8.17.0-lp151.2.15.1 openSUSE-SU-2020:0802-1
ReleasePackageFixed inAdvisory
Alpine v3.24 nghttp2 1.41.0-r0 —
Alpine v3.24 nodejs 12.18.0-r0 —
Alpine v3.24 nodejs-current 14.4.0-r0 —
Alpine v3.23 nghttp2 1.41.0-r0 —
Alpine v3.23 nodejs 12.18.0-r0 —
Alpine v3.23 nodejs-current 14.4.0-r0 —
Alpine v3.22 nghttp2 1.41.0-r0 —
Alpine v3.22 nodejs 12.18.0-r0 —
Alpine v3.22 nodejs-current 14.4.0-r0 —
Alpine v3.21 nghttp2 1.41.0-r0 —
Alpine v3.21 nodejs 12.18.0-r0 —
Alpine v3.21 nodejs-current 14.4.0-r0 —
Alpine v3.20 nghttp2 1.41.0-r0 —
Alpine v3.20 nodejs 12.18.0-r0 —
Alpine v3.20 nodejs-current 14.4.0-r0 —
Show 11 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Alpine v3.19 nghttp2 1.41.0-r0 —
Alpine v3.19 nodejs 12.18.0-r0 —
Alpine v3.19 nodejs-current 14.4.0-r0 —
Alpine v3.18 nghttp2 1.41.0-r0 —
Alpine v3.18 nodejs 12.18.0-r0 —
Alpine v3.18 nodejs-current 14.4.0-r0 —
Alpine v3.17 nghttp2 1.41.0-r0 —
Alpine v3.17 nodejs 12.18.0-r0 —
Alpine v3.17 nodejs-current 14.4.0-r0 —
Alpine v3.16 nghttp2 1.41.0-r0 —
Alpine v3.16 nodejs 12.18.0-r0 —
Alpine v3.16 nodejs-current 14.4.0-r0 —
Alpine v3.15 nghttp2 1.41.0-r0 —
Alpine v3.15 nodejs 12.18.0-r0 —
Alpine v3.15 nodejs-current 14.4.0-r0 —
Alpine v3.14 nghttp2 1.41.0-r0 —
Alpine v3.14 nodejs 12.18.0-r0 —
Alpine v3.14 nodejs-current 14.4.0-r0 —
Alpine v3.13 nghttp2 1.41.0-r0 —
Alpine v3.13 nodejs 12.18.0-r0 —
Alpine v3.13 nodejs-current 14.4.0-r0 —
Alpine v3.12 nghttp2 1.41.0-r0 —
Alpine v3.12 nodejs 12.18.3-r0 —
Alpine v3.12 nodejs-current 14.4.0-r0 —
Alpine v3.11 nghttp2 1.40.0-r1 —
Alpine v3.11 nodejs 12.20.1-r0 —
Alpine v3.10 nghttp2 1.39.2-r1 —
Alpine v3.9 nghttp2 1.35.1-r2 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 nghttp2 +2 1.41.0-1.amzn2 ALAS2-2020-1445

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 nghttp2 +2 1.33.0-3.el8_2.1 ELSA-2020-2755
Oracle Linux 8 nodejs +3 1:10.21.0-3.module+el8.2.0+7635+4ebb0540 ELSA-2020-2852, ELSA-2020-2848
Oracle Linux 8 nodejs-nodemon 1.18.3-1.module+el8.1.0+5392+4d6b561f ELSA-2020-2852, ELSA-2020-2848
Oracle Linux 8 nodejs-packaging 17-3.module+el8.1.0+5392+4d6b561f ELSA-2020-2852, ELSA-2020-2848
Oracle Linux 8 npm 1:6.14.4-1.10.21.0.3.module+el8.2.0+7635+4ebb0540 ELSA-2020-2852, ELSA-2020-2848
Oracle Linux 7 istio +10 1.4.10-1.0.1.el7 ELSA-2020-5765
Oracle Linux 7 kata 1.7.3-1.0.7.el7 ELSA-2020-5765
Oracle Linux 7 kata-image 1.7.3-1.0.5.1.ol7_202007011859 ELSA-2020-5765
Oracle Linux 7 kata-runtime 1.7.3-1.0.5.el7 ELSA-2020-5765
Oracle Linux 7 kernel-uek-container 4.14.35-1902.303.5.3.el7 ELSA-2020-5765
Oracle Linux 7 kubeadm +2 1.17.9-1.0.1.el7 ELSA-2020-5765
Oracle Linux 7 olcnectl +6 1.1.2-6.el7 ELSA-2020-5765

Advisories 45

References