CVE-2019-9511: Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
Published Aug 13, 2019
·Updated
A flaw was found in HTTP/2. An attacker can request a large amount of data by manipulating window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this queue can consume excess CPU, memory, or both, leading to a denial of service. The highest threat from this vulnerability is to system availability.
Other sources
A vulnerability was found in http/2 where an attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both, potentially leading to a denial of service.
— Red Hat
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Affected Software
159 affected componentsFixes available
redhat/jbcs-httpd24-httpd<0:2.4.29-41.jbcs.el6
0:2.4.29-41.jbcs.el6
redhat/jbcs-httpd24-nghttp2<0:1.39.2-1.jbcs.el6
0:1.39.2-1.jbcs.el6
redhat/jbcs-httpd24-apr<0:1.6.3-63.jbcs.el6
0:1.6.3-63.jbcs.el6
redhat/jbcs-httpd24-apr-util<0:1.6.1-48.jbcs.el6
0:1.6.1-48.jbcs.el6
redhat/jbcs-httpd24-brotli<0:1.0.6-7.jbcs.el6
0:1.0.6-7.jbcs.el6
redhat/jbcs-httpd24-curl<0:7.64.1-14.jbcs.el6
0:7.64.1-14.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.37-33.jbcs.el6
0:2.4.37-33.jbcs.el6
redhat/jbcs-httpd24-jansson<0:2.11-20.jbcs.el6
0:2.11-20.jbcs.el6
redhat/jbcs-httpd24-nghttp2<0:1.39.2-4.jbcs.el6
0:1.39.2-4.jbcs.el6
redhat/jbcs-httpd24-openssl<1:1.1.1-25.jbcs.el6
1:1.1.1-25.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.29-41.jbcs.el7
0:2.4.29-41.jbcs.el7
redhat/jbcs-httpd24-nghttp2<0:1.39.2-1.jbcs.el7
0:1.39.2-1.jbcs.el7
redhat/jbcs-httpd24-apr<0:1.6.3-63.jbcs.el7
0:1.6.3-63.jbcs.el7
redhat/jbcs-httpd24-apr-util<0:1.6.1-48.jbcs.el7
0:1.6.1-48.jbcs.el7
redhat/jbcs-httpd24-brotli<0:1.0.6-7.jbcs.el7
0:1.0.6-7.jbcs.el7
redhat/jbcs-httpd24-curl<0:7.64.1-14.jbcs.el7
0:7.64.1-14.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-33.jbcs.el7
0:2.4.37-33.jbcs.el7
redhat/jbcs-httpd24-jansson<0:2.11-20.jbcs.el7
0:2.11-20.jbcs.el7
redhat/jbcs-httpd24-nghttp2<0:1.39.2-4.jbcs.el7
0:1.39.2-4.jbcs.el7
redhat/jbcs-httpd24-openssl<1:1.1.1-25.jbcs.el7
1:1.1.1-25.jbcs.el7
redhat/kiali<0:v1.0.6.redhat1-1.el7
0:v1.0.6.redhat1-1.el7
redhat/servicemesh<0:1.0.1-8.el8
0:1.0.1-8.el8
redhat/servicemesh-cni<0:1.0.1-8.el8
0:1.0.1-8.el8
redhat/servicemesh-grafana<0:6.2.2-21.el8
0:6.2.2-21.el8
redhat/servicemesh-operator<0:1.0.1-8.el8
0:1.0.1-8.el8
redhat/servicemesh-prometheus<0:2.7.2-22.el8
0:2.7.2-22.el8
redhat/servicemesh-proxy<0:1.0.1-7.el8
0:1.0.1-7.el8
redhat/nghttp2<0:1.33.0-1.el8_0.1
0:1.33.0-1.el8_0.1
redhat/eap7-apache-cxf<0:3.2.10-1.redhat_00001.1.el6ea
0:3.2.10-1.redhat_00001.1.el6ea
redhat/eap7-byte-buddy<0:1.9.11-1.redhat_00002.1.el6ea
0:1.9.11-1.redhat_00002.1.el6ea
redhat/eap7-glassfish-jsf<0:2.3.5-5.SP3_redhat_00003.1.el6ea
0:2.3.5-5.SP3_redhat_00003.1.el6ea
redhat/eap7-hal-console<0:3.0.17-2.Final_redhat_00001.1.el6ea
0:3.0.17-2.Final_redhat_00001.1.el6ea
redhat/eap7-hibernate<0:5.3.13-1.Final_redhat_00001.1.el6ea
0:5.3.13-1.Final_redhat_00001.1.el6ea
redhat/eap7-ironjacamar<0:1.4.18-1.Final_redhat_00001.1.el6ea
0:1.4.18-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-genericjms<0:2.0.2-1.Final_redhat_00001.1.el6ea
0:2.0.2-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-msc<0:1.4.11-1.Final_redhat_00001.1.el6ea
0:1.4.11-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-remoting<0:5.0.16-2.Final_redhat_00001.1.el6ea
0:5.0.16-2.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-server-migration<0:1.3.1-6.Final_redhat_00006.1.el6ea
0:1.3.1-6.Final_redhat_00006.1.el6ea
redhat/eap7-jboss-xnio-base<0:3.7.6-2.SP1_redhat_00001.1.el6ea
0:3.7.6-2.SP1_redhat_00001.1.el6ea
redhat/eap7-picketbox<0:5.0.3-6.Final_redhat_00005.1.el6ea
0:5.0.3-6.Final_redhat_00005.1.el6ea
redhat/eap7-picketlink-bindings<0:2.5.5-20.SP12_redhat_00009.1.el6ea
0:2.5.5-20.SP12_redhat_00009.1.el6ea
redhat/eap7-picketlink-federation<0:2.5.5-20.SP12_redhat_00009.1.el6ea
0:2.5.5-20.SP12_redhat_00009.1.el6ea
redhat/eap7-resteasy<0:3.6.1-7.SP7_redhat_00001.1.el6ea
0:3.6.1-7.SP7_redhat_00001.1.el6ea
redhat/eap7-undertow<0:2.0.26-2.SP3_redhat_00001.1.el6ea
0:2.0.26-2.SP3_redhat_00001.1.el6ea
redhat/eap7-wildfly<0:7.2.5-4.GA_redhat_00002.1.el6ea
0:7.2.5-4.GA_redhat_00002.1.el6ea
redhat/eap7-wildfly-elytron<0:1.6.5-1.Final_redhat_00001.1.el6ea
0:1.6.5-1.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-elytron-tool<0:1.4.4-1.Final_redhat_00001.1.el6ea
0:1.4.4-1.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-http-client<0:1.0.17-1.Final_redhat_00001.1.el6ea
0:1.0.17-1.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-openssl<0:1.0.8-1.Final_redhat_00001.1.el6ea
0:1.0.8-1.Final_redhat_00001.1.el6ea
redhat/eap7-yasson<0:1.0.5-1.redhat_00001.1.el6ea
0:1.0.5-1.redhat_00001.1.el6ea
redhat/eap7-apache-cxf<0:3.2.10-1.redhat_00001.1.el7ea
0:3.2.10-1.redhat_00001.1.el7ea
redhat/eap7-byte-buddy<0:1.9.11-1.redhat_00002.1.el7ea
0:1.9.11-1.redhat_00002.1.el7ea
redhat/eap7-glassfish-jsf<0:2.3.5-5.SP3_redhat_00003.1.el7ea
0:2.3.5-5.SP3_redhat_00003.1.el7ea
redhat/eap7-hal-console<0:3.0.17-2.Final_redhat_00001.1.el7ea
0:3.0.17-2.Final_redhat_00001.1.el7ea
redhat/eap7-hibernate<0:5.3.13-1.Final_redhat_00001.1.el7ea
0:5.3.13-1.Final_redhat_00001.1.el7ea
redhat/eap7-ironjacamar<0:1.4.18-1.Final_redhat_00001.1.el7ea
0:1.4.18-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-genericjms<0:2.0.2-1.Final_redhat_00001.1.el7ea
0:2.0.2-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-msc<0:1.4.11-1.Final_redhat_00001.1.el7ea
0:1.4.11-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-remoting<0:5.0.16-2.Final_redhat_00001.1.el7ea
0:5.0.16-2.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-server-migration<0:1.3.1-6.Final_redhat_00006.1.el7ea
0:1.3.1-6.Final_redhat_00006.1.el7ea
redhat/eap7-jboss-xnio-base<0:3.7.6-2.SP1_redhat_00001.1.el7ea
0:3.7.6-2.SP1_redhat_00001.1.el7ea
redhat/eap7-picketbox<0:5.0.3-6.Final_redhat_00005.1.el7ea
0:5.0.3-6.Final_redhat_00005.1.el7ea
redhat/eap7-picketlink-bindings<0:2.5.5-20.SP12_redhat_00009.1.el7ea
0:2.5.5-20.SP12_redhat_00009.1.el7ea
redhat/eap7-picketlink-federation<0:2.5.5-20.SP12_redhat_00009.1.el7ea
0:2.5.5-20.SP12_redhat_00009.1.el7ea
redhat/eap7-resteasy<0:3.6.1-7.SP7_redhat_00001.1.el7ea
0:3.6.1-7.SP7_redhat_00001.1.el7ea
redhat/eap7-undertow<0:2.0.26-2.SP3_redhat_00001.1.el7ea
0:2.0.26-2.SP3_redhat_00001.1.el7ea
redhat/eap7-wildfly<0:7.2.5-4.GA_redhat_00002.1.el7ea
0:7.2.5-4.GA_redhat_00002.1.el7ea
redhat/eap7-wildfly-elytron<0:1.6.5-1.Final_redhat_00001.1.el7ea
0:1.6.5-1.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-elytron-tool<0:1.4.4-1.Final_redhat_00001.1.el7ea
0:1.4.4-1.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-http-client<0:1.0.17-1.Final_redhat_00001.1.el7ea
0:1.0.17-1.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-openssl<0:1.0.8-1.Final_redhat_00001.1.el7ea
0:1.0.8-1.Final_redhat_00001.1.el7ea
redhat/eap7-yasson<0:1.0.5-1.redhat_00001.1.el7ea
0:1.0.5-1.redhat_00001.1.el7ea
redhat/eap7-apache-cxf<0:3.2.10-1.redhat_00001.1.el8ea
0:3.2.10-1.redhat_00001.1.el8ea
redhat/eap7-byte-buddy<0:1.9.11-1.redhat_00002.1.el8ea
0:1.9.11-1.redhat_00002.1.el8ea
redhat/eap7-glassfish-jsf<0:2.3.5-5.SP3_redhat_00003.1.el8ea
0:2.3.5-5.SP3_redhat_00003.1.el8ea
redhat/eap7-hal-console<0:3.0.17-2.Final_redhat_00001.1.el8ea
0:3.0.17-2.Final_redhat_00001.1.el8ea
redhat/eap7-hibernate<0:5.3.13-1.Final_redhat_00001.1.el8ea
0:5.3.13-1.Final_redhat_00001.1.el8ea
redhat/eap7-ironjacamar<0:1.4.18-1.Final_redhat_00001.1.el8ea
0:1.4.18-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-genericjms<0:2.0.2-1.Final_redhat_00001.1.el8ea
0:2.0.2-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-msc<0:1.4.11-1.Final_redhat_00001.1.el8ea
0:1.4.11-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-remoting<0:5.0.16-2.Final_redhat_00001.1.el8ea
0:5.0.16-2.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-server-migration<0:1.3.1-6.Final_redhat_00006.1.el8ea
0:1.3.1-6.Final_redhat_00006.1.el8ea
redhat/eap7-jboss-xnio-base<0:3.7.6-2.SP1_redhat_00001.1.el8ea
0:3.7.6-2.SP1_redhat_00001.1.el8ea
redhat/eap7-picketbox<0:5.0.3-6.Final_redhat_00005.1.el8ea
0:5.0.3-6.Final_redhat_00005.1.el8ea
redhat/eap7-picketlink-bindings<0:2.5.5-20.SP12_redhat_00009.1.el8ea
0:2.5.5-20.SP12_redhat_00009.1.el8ea
redhat/eap7-picketlink-federation<0:2.5.5-20.SP12_redhat_00009.1.el8ea
0:2.5.5-20.SP12_redhat_00009.1.el8ea
redhat/eap7-resteasy<0:3.6.1-7.SP7_redhat_00001.1.el8ea
0:3.6.1-7.SP7_redhat_00001.1.el8ea
redhat/eap7-undertow<0:2.0.26-2.SP3_redhat_00001.1.el8ea
0:2.0.26-2.SP3_redhat_00001.1.el8ea
redhat/eap7-wildfly<0:7.2.5-4.GA_redhat_00002.1.el8ea
0:7.2.5-4.GA_redhat_00002.1.el8ea
redhat/eap7-wildfly-elytron<0:1.6.5-1.Final_redhat_00001.1.el8ea
0:1.6.5-1.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-elytron-tool<0:1.4.4-1.Final_redhat_00001.1.el8ea
0:1.4.4-1.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-http-client<0:1.0.17-1.Final_redhat_00001.1.el8ea
0:1.0.17-1.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-openssl<0:1.0.8-1.Final_redhat_00001.1.el8ea
0:1.0.8-1.Final_redhat_00001.1.el8ea
redhat/eap7-yasson<0:1.0.5-1.redhat_00001.1.el8ea
0:1.0.5-1.redhat_00001.1.el8ea
redhat/rh-nginx110-nginx<1:1.10.2-9.el6.1
1:1.10.2-9.el6.1
redhat/httpd24-httpd<0:2.4.34-8.el6.1
0:2.4.34-8.el6.1
redhat/httpd24-nghttp2<0:1.7.1-7.el6.1
0:1.7.1-7.el6.1
redhat/rh-nginx110-nginx<1:1.10.2-9.el7.1
1:1.10.2-9.el7.1
redhat/rh-nginx112-nginx<1:1.12.1-3.el7.1
1:1.12.1-3.el7.1
redhat/rh-nginx114-nginx<1:1.14.1-1.el7.1
1:1.14.1-1.el7.1
redhat/rh-nodejs10<0:3.2-3.el7
0:3.2-3.el7
redhat/rh-nodejs10-nodejs<0:10.16.3-3.el7
0:10.16.3-3.el7
redhat/httpd24-httpd<0:2.4.34-8.el7.1
0:2.4.34-8.el7.1
redhat/httpd24-nghttp2<0:1.7.1-7.el7.1
0:1.7.1-7.el7.1
redhat/rh-nodejs8<0:3.0-5.el7
0:3.0-5.el7
redhat/rh-nodejs8-nodejs<0:8.16.1-2.el7
0:8.16.1-2.el7
All of the following
Apple Swiftnio>=1.0.0<=1.4.0
Any of the following
Apple iOS and macOS>=10.12
Canonical Ubuntu Linux>=14.04
Apache Traffic Server>=6.0.0<=6.2.3
Apache Traffic Server>=7.0.0<=7.1.6
Apache Traffic Server>=8.0.0<=8.0.3
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.04
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Synology Skynas
Synology Diskstation Manager=6.2
All of the following
Synology Vs960hd Firmware
Synology Vs960hd
Fedoraproject Fedora=29
Fedoraproject Fedora=30
openSUSE Leap=15.0
openSUSE Leap=15.1
redhat JBoss Core Services=1.0
redhat JBoss Enterprise Application Platform=7.2.0
redhat JBoss Enterprise Application Platform=7.3.0
redhat Openshift Service Mesh=1.0
redhat Quay=3.0.0
redhat Software Collections=1.0
redhat Enterprise Linux=8.0
Oracle GraalVM=19.2.0
McAfee Web Gateway>=7.7.2.0<7.7.2.24
McAfee Web Gateway>=7.8.2.0<7.8.2.13
McAfee Web Gateway>=8.1.0<8.2.0
F5 Nginx>=1.9.5<1.16.1
F5 Nginx>=1.17.0<=1.17.2
Oracle Enterprise Communications Broker=3.1.0
Oracle Enterprise Communications Broker=3.2.0
Nodejs Node.js>=8.0.0<=8.8.1
Nodejs Node.js>=8.9.0<8.16.1
Nodejs Node.js>=10.0.0<=10.12.0
Nodejs Node.js>=10.13.0<10.16.3
Nodejs Node.js>=12.0.0<12.8.1
Apple Swiftnio>=1.0.0<=1.4.0
Apple iOS and macOS>=10.12
Canonical Ubuntu Linux>=14.04
Synology Diskstation Manager=6.2
Synology Vs960hd Firmware
Synology Vs960hd
redhat/Nodejs<8.16.1
8.16.1
redhat/Nodejs<10.16.3
10.16.3
redhat/Nodejs<12.8.1
12.8.1
redhat/nginx<1.16.1
1.16.1
redhat/nginx<1.17.3
1.17.3
debian/nghttp2
1.43.0-1+deb11u11.43.0-1+deb11u21.52.0-1+deb12u21.52.0-1+deb12u11.64.0-1.11.68.0-1
debian/nginx
1.18.0-6.1+deb11u31.18.0-6.1+deb11u51.22.1-9+deb12u31.22.1-9+deb12u41.26.3-3+deb13u11.26.3-3+deb13u21.28.2-2
debian/nodejs
12.22.12~dfsg-1~deb11u412.22.12~dfsg-1~deb11u718.20.4+dfsg-1~deb12u120.19.2+dfsg-122.22.0+dfsg+~cs22.19.6-1
Remediation
Information
Red Hat Quay 3.0 uses Nginx 1.12 from Red Hat Software Collections. It will be updated once a fixed is released for Software Collections. In the meantime users of Quay can disable http/2 support in Nginx by following these instructions:
1. Copy the Nginx configuration from the quay container to the host
$ docker cp 3aadf1421ba3:/quay-registry/conf/nginx/ /mnt/quay/nginx
2. Edit the Nginx configuration, removing http/2 support
$ sed -i 's/http2 //g' /mnt/quay/nginx/nginx.conf
3. Restart Nginx with the new configuration mounted into the container, eg:
$ docker run --restart=always -p 443:8443 -p 80:8080 --sysctl net.core.somaxconn=4096 -v /mnt/quay/config:/conf/stack:Z -v /mnt/quay/storage:/datastorage -v /mnt/quay/nginx:/quay-registry/config/nginx:Z -d quay.io/redhat/quay:v3.0.3
Event History
Aug 13, 2019
CVE Published
12:00 AM
CVE Published
via MITRE·08:50 PM
Data Sourced
via MITRE·08:50 PM
DescriptionSeverityWeakness
Aug 16, 2019
Data Sourced
via Red Hat·09:39 AM
DescriptionSeverityAffected Software
Feb 23, 2026
Data Sourced
via Ubuntu·05:40 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Debian·05:41 PM
DescriptionAffected Software
Data Sourced
via Launchpad·05:41 PM
Description
Parent advisories
This vulnerability appears in the following advisories.
- RHSA-2019:2946
- RHSA-2019:3932
- RHSA-2019:3933
- RHSA-2019:3041
- RHSA-2020:0922
- RHSA-2020:1445
- RHSA-2019:2799
- RHSA-2019:2925
- RHSA-2019:2692
- RHSA-2019:3935
- RHSA-2019:4021
- RHSA-2019:4018
- RHSA-2019:4019
- RHSA-2019:4020
- RHSA-2020:2565
- RHSA-2020:3192
- RHSA-2019:2966
- RHSA-2019:2745
- RHSA-2019:2949
- RHSA-2019:2746
- RHSA-2019:2775
- RHSA-2019:2939
- RHSA-2019:2955
- RHSA-2020:2067
Frequently Asked Questions
1
What is the severity of CVE-2019-9511?
CVE-2019-9511 has been rated as a moderate severity vulnerability due to its potential impact on system performance and resources.
2
How do I fix CVE-2019-9511?
To remediate CVE-2019-9511, update to the patched versions specified by Red Hat for affected packages such as jbcs-httpd24-httpd and jbcs-httpd24-nghttp2.
3
What types of software are affected by CVE-2019-9511?
CVE-2019-9511 affects various packages including Red Hat's JBoss Core Services, Apache HTTP Server, and Node.js among others.
4
Is my system vulnerable to CVE-2019-9511?
To determine if your system is vulnerable to CVE-2019-9511, verify if you are using any affected versions of the mentioned packages.
5
What are the potential impacts of CVE-2019-9511?
The potential impacts of CVE-2019-9511 include excessive CPU and memory consumption, leading to degraded application performance.