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TI-2019-06953 Aliases CVE-2019-9518GHSA-93p3-5r25-4p75

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially…

Priority MEDIUM 54CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 14 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

Why it matters now

EPSS 0.25448 97th percentileScored 2026-11-07
Fix Partial Red Hat: 11 advisoriesRed Hat: 14 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 31

CPEVersionsRoleVendor
cpe:2.3:a:apple:swiftnio:*:*:*:*:*:*:*:*1.0.0 – 1.4.0VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*10.12Running onApple
cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*14.04Running onCanonical
cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*6.0.0 – 6.2.3; 7.0.0 – 7.1.6; 8.0.0 – 8.0.3VulnerableApache
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*19.04VulnerableCanonical
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:*not specified by NVDVulnerableSynology
  • cpe:2.3:a:apple:swiftnio:*:*:*:*:*:*:*:* Versions 1.0.0 – 1.4.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions 10.12 Running on ·Apple
  • cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:* Versions 14.04 Running on ·Canonical
  • cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* Versions 6.0.0 – 6.2.3; 7.0.0 – 7.1.6; 8.0.0 – 8.0.3 Vulnerable ·Apache
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* Versions 19.04 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Synology
Show 21 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*6.2VulnerableSynology
cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSynology
cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:*not specified by NVDRunning onSynology
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*29VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:*1.0VulnerableRed Hat
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.2.0:*:*:*:*:*:*:*7.2.0VulnerableRed Hat
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3.0:*:*:*:*:*:*:*7.3.0VulnerableRed Hat
cpe:2.3:a:redhat:openshift_service_mesh:1.0:*:*:*:*:*:*:*1.0VulnerableRed Hat
cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:*3.0.0VulnerableRed Hat
cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:*1.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:a:oracle:graalvm:19.2.0:*:*:*:enterprise:*:*:*19.2.0VulnerableOracle
cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*7.7.2.0 to before 7.7.2.24; 7.8.2.0 to before 7.8.2.13; 8.1.0 to before 8.2.0VulnerableMcAfee
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*8.0.0 – 8.8.1VulnerableNodeJS
cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*8.9.0 to before 8.16.1VulnerableNodeJS
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*10.0.0 – 10.12.0VulnerableNodeJS
cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*10.13.0 to before 10.16.3VulnerableNodeJS
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*12.0.0 to before 12.8.1VulnerableNodeJS
  • cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:* Versions 6.2 Vulnerable ·Synology
  • cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Synology
  • cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Synology
  • cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* Versions 29 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.2.0:*:*:*:*:*:*:* Versions 7.2.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3.0:*:*:*:*:*:*:* Versions 7.3.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openshift_service_mesh:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:* Versions 3.0.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:a:oracle:graalvm:19.2.0:*:*:*:enterprise:*:*:* Versions 19.2.0 Vulnerable ·Oracle
  • cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* Versions 7.7.2.0 to before 7.7.2.24; 7.8.2.0 to before 7.8.2.13; 8.1.0 to before 8.2.0 Vulnerable ·McAfee
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 8.0.0 – 8.8.1 Vulnerable ·NodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* Versions 8.9.0 to before 8.16.1 Vulnerable ·NodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 10.0.0 – 10.12.0 Vulnerable ·NodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* Versions 10.13.0 to before 10.16.3 Vulnerable ·NodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 12.0.0 to before 12.8.1 Vulnerable ·NodeJS

Remediation

Red Hat 11 advisories

  • RHSA-2020:3197 Released 2020-07-29 · Red Hat rating Important
    Red Hat Process Automation Manager 7.8.0 Security Update
    • Red Hat Process Automation 7
  • RHSA-2020:3196 Released 2020-07-29 · Red Hat rating Important
    Red Hat Decision Manager 7.8.0 Security Update
    • Red Hat Decision Manager 7
  • RHSA-2020:1445 Released 2020-04-14 · Red Hat rating Important
    Red Hat AMQ Broker 7.4.3 release and security update
    • Red Hat AMQ 7.4.3
Show 8 more Red Hat advisories
  • RHSA-2020:0983 Released 2020-03-26 · Red Hat rating Important
    Red Hat Fuse 7.6.0 security update
    • Red Hat Fuse 7.6.0
  • RHSA-2020:0922 Released 2020-03-23 · Red Hat rating Important
    Red Hat AMQ Broker 7.6 release and security update
    • Red Hat AMQ
  • RHSA-2020:0727 Released 2020-03-05 · Red Hat rating Important
    Red Hat Data Grid 7.3.3 security update
    • Red Hat Data Grid 7.3.3
  • RHSA-2019:4352 Released 2019-12-19 · Red Hat rating Important
    Red Hat JBoss Fuse/A-MQ 6.3 R14 security and bug fix update
    • Red Hat Fuse 6.3
  • RHSA-2019:3892 Released 2019-11-14 · Red Hat rating Important
    Red Hat Fuse 7.5.0 security update
    • Red Hat Fuse 7.5.0
  • RHSA-2019:2955 Released 2019-10-02 · Red Hat rating Important
    rh-nodejs8-nodejs security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs8-3.0-5.el7, rh-nodejs8-nodejs-8.16.1-2.el7, rh-nodejs8-nodejs-devel-8.16.1-2.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nodejs8-3.0-5.el7, rh-nodejs8-nodejs-8.16.1-2.el7, rh-nodejs8-nodejs-devel-8.16.1-2.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nodejs8-3.0-5.el7, rh-nodejs8-nodejs-8.16.1-2.el7, rh-nodejs8-nodejs-devel-8.16.1-2.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs8-3.0-5.el7, rh-nodejs8-nodejs-8.16.1-2.el7, rh-nodejs8-nodejs-devel-8.16.1-2.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs8-3.0-5.el7, rh-nodejs8-nodejs-8.16.1-2.el7, rh-nodejs8-nodejs-devel-8.16.1-2.el7 +4
  • RHSA-2019:2939 Released 2019-10-01 · Red Hat rating Important
    rh-nodejs10-nodejs security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs10-3.2-3.el7, rh-nodejs10-nodejs-10.16.3-3.el7, rh-nodejs10-nodejs-devel-10.16.3-3.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nodejs10-3.2-3.el7, rh-nodejs10-nodejs-10.16.3-3.el7, rh-nodejs10-nodejs-devel-10.16.3-3.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nodejs10-3.2-3.el7, rh-nodejs10-nodejs-10.16.3-3.el7, rh-nodejs10-nodejs-devel-10.16.3-3.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs10-3.2-3.el7, rh-nodejs10-nodejs-10.16.3-3.el7, rh-nodejs10-nodejs-devel-10.16.3-3.el7 +4
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs10-3.2-3.el7, rh-nodejs10-nodejs-10.16.3-3.el7, rh-nodejs10-nodejs-devel-10.16.3-3.el7 +4
  • RHSA-2019:2925 Released 2019-09-30 · Red Hat rating Important
    nodejs:10 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:10.16.3-2.module+el8.0.0+4214+49953fda.aarch64::nodejs:10, nodejs-1:10.16.3-2.module+el8.0.0+4214+49953fda.ppc64le::nodejs:10, nodejs-1:10.16.3-2.module+el8.0.0+4214+49953fda.s390x::nodejs:10 +15

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AMQ Broker 7AffectedNo fix yet
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix yet: Fix deferred
Red Hat JBoss Fuse 6AffectedNo fix planned: Out of support scope
Red Hat OpenShift Application RuntimesAffectedNo fix yet
Red Hat AMQFixed RHSA-2020:0922
Red Hat AMQ 7.4.3Fixed RHSA-2020:1445
Red Hat Data Grid 7.3.3Fixed RHSA-2020:0727
Red Hat Decision Manager 7Fixed RHSA-2020:3196
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2019:2925
Red Hat Fuse 6.3Fixed RHSA-2019:4352
Red Hat Fuse 7.5.0Fixed RHSA-2019:3892
Red Hat Fuse 7.6.0Fixed RHSA-2020:0983
Red Hat Process Automation 7Fixed RHSA-2020:3197
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2939, RHSA-2019:2955
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2019:2939, RHSA-2019:2955
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2019:2939, RHSA-2019:2955
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2019:2939, RHSA-2019:2955
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2939, RHSA-2019:2955
Not affected: 16 products
  • CloudForms Management Engine 5
  • OpenShift Service Mesh Tech Preview
  • Red Hat Ansible Tower 3
  • Red Hat Enterprise Linux 8
  • Red Hat JBoss Data Grid 7
  • Red Hat JBoss Data Virtualization 6
  • Red Hat JBoss Enterprise Application Platform 6
  • Red Hat OpenShift Application Runtimes
  • Red Hat OpenShift Container Platform 3.10
  • Red Hat OpenShift Container Platform 3.11
  • Red Hat OpenShift Container Platform 3.9
  • Red Hat OpenShift Container Platform 4
  • Red Hat Process Automation 7
  • Red Hat Quay 3
  • Red Hat Single Sign-On 7
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9518
  2. 2026-10-03 Alias added: GHSA-93p3-5r25-4p75

References

Advisory 20

Other 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences