high
7.8
CWE
770 400
Advisory Published
CVE Published
CVE Published
Updated

CVE-2019-9518: Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service

First published: Thu Aug 01 2019(Updated: )

A flaw was found in HTTP/2. Using frames with an empty payload, a flood could occur that results in excessive CPU usage and starvation of other clients. The highest threat from this vulnerability is to system availability.

Credit: cret@cert.org cret@cert.org

Affected SoftwareAffected VersionHow to fix
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/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
redhat/envoy<1.11.1
1.11.1
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/undertow<2.0.26.
2.0.26.
All of
Apple Swiftnio>=1.0.0<=1.4.0
Any of
Apple Mac OS X>=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 DiskStation Manager=6.2
Synology Skynas
All of
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
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 Mac OS X>=10.12
Canonical Ubuntu Linux>=14.04
Synology Vs960hd Firmware
Synology Vs960hd
debian/trafficserver
8.1.10+ds-1~deb11u1
8.1.11+ds-0+deb11u1
9.2.4+ds-0+deb12u1
9.2.5+ds-0+deb12u1
9.2.5+ds-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-9518?

    CVE-2019-9518 is a vulnerability in HTTP/2 that allows for a flood of empty frames, potentially leading to a denial of service.

  • What is the severity of CVE-2019-9518?

    CVE-2019-9518 has a severity level of high, with a severity value of 7.

  • Which software is affected by CVE-2019-9518?

    The affected software includes rh-nodejs10, rh-nodejs10-nodejs, rh-nodejs8, rh-nodejs8-nodejs, envoy, Nodejs, undertow, netty, and trafficserver.

  • How can CVE-2019-9518 be fixed?

    To fix CVE-2019-9518, ensure that you have the latest versions of the affected software installed, as specified in the Remediation section of the references.

  • Where can I find more information about CVE-2019-9518?

    You can find more information about CVE-2019-9518 in the references provided.

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