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7.5
CVSSv3

CVE-2019-9518

CVSSv4: NA | CVSSv3: 7.5 | CVSSv2: 7.8 | VMScore: 850 | EPSS: 0.03674 | KEV: Not Included
Published: 13/08/2019 Updated: 14/01/2025

Vulnerability 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.

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apple swiftnio

apache traffic server

canonical ubuntu linux 16.04

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oracle graalvm 19.2.0

mcafee web gateway

nodejs node.js

Vendor Advisories

Debian CVElist Bug Report Logs: trafficserver: CVE-2019-9518
Debian Bug report logs - #935314 trafficserver: CVE-2019-9518 Package: src:trafficserver; Maintainer for src:trafficserver is Jean Baptiste Favre <debian@jbfavreorg>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Wed, 21 Aug 2019 14:24:01 UTC Severity: grave Tags: security, upstream Found in version t ...
Debian Security Advisories: DSA-4520-1 trafficserver -- security update
Several vulnerabilities were discovered in the HTTP/2 code of Apache Traffic Server, a reverse and forward proxy server, which could result in denial of service The fixes are too intrusive to backport to the version in the oldstable distribution (stretch) An upgrade to Debian stable (buster) is recommended instead For the stable distribution (bu ...
Red Hat: Important: Red Hat Process Automation Manager 7.8.0 Security Update
Synopsis Important: Red Hat Process Automation Manager 780 Security Update Type/Severity Security Advisory: Important Topic An update is now available for Red Hat Process Automation ManagerRed Hat Product Security has rated this update as having a security impact of Moderate A Common Vulnerability Scori ...
Red Hat: Important: nodejs:10 security update
Synopsis Important: nodejs:10 security update Type/Severity Security Advisory: Important Topic An update for the nodejs:10 module is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CV ...
Red Hat: Important: Red Hat Fuse 7.6.0 security update
Synopsis Important: Red Hat Fuse 760 security update Type/Severity Security Advisory: Important Topic A minor version update (from 75 to 76) is now available for Red Hat Fuse The purpose of this text-only errata is to inform you about the security issues fixed in this releaseRed Hat Product Security h ...
Red Hat: Important: Red Hat AMQ Broker 7.6 release and security update
Synopsis Important: Red Hat AMQ Broker 76 release and security update Type/Severity Security Advisory: Important Topic Red Hat AMQ Broker 76 is now available from the Red Hat Customer PortalRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Sco ...
Red Hat: Important: rh-nodejs10-nodejs security update
Synopsis Important: rh-nodejs10-nodejs security update Type/Severity Security Advisory: Important Topic An update for rh-nodejs10-nodejs is now available for Red Hat Software CollectionsRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring S ...
Red Hat: Important: rh-nodejs8-nodejs security update
Synopsis Important: rh-nodejs8-nodejs security update Type/Severity Security Advisory: Important Topic An update for rh-nodejs8-nodejs is now available for Red Hat Software CollectionsRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring Sys ...
Red Hat: Important: Red Hat Decision Manager 7.8.0 Security Update
Synopsis Important: Red Hat Decision Manager 780 Security Update Type/Severity Security Advisory: Important Topic An update is now available for Red Hat Decision ManagerRed Hat Product Security has rated this update as having a security impact of Moderate A Common Vulnerability Scoring System (CVSS) bas ...
Red Hat: Important: Red Hat AMQ Broker 7.4.3 release and security update
Synopsis Important: Red Hat AMQ Broker 743 release and security update Type/Severity Security Advisory: Important Topic Red Hat AMQ Broker 743 is now available from the Red Hat Customer PortalRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability ...
Red Hat: Important: Red Hat JBoss Fuse/A-MQ 6.3 R14 security and bug fix update
Synopsis Important: Red Hat JBoss Fuse/A-MQ 63 R14 security and bug fix update Type/Severity Security Advisory: Important Topic An update is now available for Red Hat JBoss Fuse 63 and Red Hat JBoss A-MQ 63Red Hat Product Security has rated this update as having a security impact of Important A Common ...
Red Hat: Important: Red Hat Fuse 7.5.0 security update
Synopsis Important: Red Hat Fuse 750 security update Type/Severity Security Advisory: Important Topic A minor version update (from 74 to 75) is now available for Red Hat Fuse The purpose of this text-only errata is to inform you about the security issues fixed in this releaseRed Hat Product Security h ...
Red Hat: Important: Red Hat Data Grid 7.3.3 security update
Synopsis Important: Red Hat Data Grid 733 security update Type/Severity Security Advisory: Important Topic An update for Red Hat Data Grid is now availableRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) base score, whic ...
Red Hat: CVE-2019-9518
Impact: Important Public Date: 2019-08-13 CWE: CWE-400 Bugzilla: 1735749: CVE-2019-9518 istio/envoy: HT ...

Mailing Lists

Full Disclosure: APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 150 SwiftNIO HTTP/2 150 is now available and addresses the following: SwiftNIO HTTP/2 Available for: SwiftNIO HTTP/2 100 through 140 on macOS Sierra 1012 and later and Ubuntu 1404 and later Impact: A HTTP/2 server may consume unbounded amounts of memo ...

Recent Articles

Microsoft Patch Tuesday – August 2019
Symantec Threat Intelligence Blog • Ratheesh PM • 14 Aug 2025

This month the vendor has patched 93 vulnerabilities, 27 of which are rated Critical.

Posted: 14 Aug, 201926 Min ReadThreat Intelligence SubscribeFollowtwitterfacebooklinkedinMicrosoft Patch Tuesday – August 2019This month the vendor has patched 93 vulnerabilities, 27 of which are rated Critical.This month Microsoft has patched 93 vulnerabilities, 27 of which are rated Critical. As always, customers are advised to follow these security best practices: Install vendor patches as soon as they are available. Run all sof...

Read more...
HTTP/2, Brute! Then fall, server. Admin! Ops! The server is dead
The Register • Thomas Claburn in San Francisco • 14 Aug 2019

Beware the denials of service: Netflix warns of eight networking bugs

On Tuesday, Netflix, working in conjunction with Google and CERT/CC, published a security advisory covering a series of vulnerabilities that enable denial of service attacks against servers running HTTP/2 services. HTTP/2, like earlier versions, governs the application layer of the internet stack; it runs atop the transport layer (TCP), the network layer (IP), and data link layer of the internet. The eight CVEs disclosed do not allow information disclosure or modification, but they could be empl...

Read more...

References

CWE-400CWE-770https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=935314https://nvd.nist.govhttps://www.kb.cert.org/vuls/id/605641https://www.first.org/epsshttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlhttp://seclists.org/fulldisclosure/2019/Aug/16https://access.redhat.com/errata/RHSA-2019:2925https://access.redhat.com/errata/RHSA-2019:2939https://access.redhat.com/errata/RHSA-2019:2955https://access.redhat.com/errata/RHSA-2019:3892https://access.redhat.com/errata/RHSA-2019:4352https://access.redhat.com/errata/RHSA-2020:0727https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.mdhttps://kb.cert.org/vuls/id/605641/https://kc.mcafee.com/corporate/index?page=content&id=SB10296https://lists.apache.org/thread.html/091b518265bce56a16af87b77c8cfacda902a02079e866f9fdf13b61%40%3Cusers.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/2653c56545573b528f3f6352a29eccaf498bd6fb2a6a59568d81a61d%40%3Cannounce.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3Ehttps://lists.apache.org/thread.html/ff5b0821a6985159a832ff6d1a4bd311ac07ecc7db1e2d8bab619107%40%3Cdev.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/r99a625fb17032646d96cd23dec49603ff630e9318e44a686d63046bc%40%3Ccommits.cassandra.apache.org%3Ehttps://lists.apache.org/thread.html/rd31230d01fa6aad18bdadc0720acd1747e53690bd35f73a48e7a9b75%40%3Ccommits.cassandra.apache.org%3Ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/https://seclists.org/bugtraq/2019/Aug/24https://seclists.org/bugtraq/2019/Sep/18https://security.netapp.com/advisory/ntap-20190823-0005/https://support.f5.com/csp/article/K46011592https://support.f5.com/csp/article/K46011592?utm_source=f5support&%3Butm_medium=RSShttps://www.debian.org/security/2019/dsa-4520https://www.synology.com/security/advisory/Synology_SA_19_33http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlhttp://seclists.org/fulldisclosure/2019/Aug/16https://access.redhat.com/errata/RHSA-2019:2925https://access.redhat.com/errata/RHSA-2019:2939https://access.redhat.com/errata/RHSA-2019:2955https://access.redhat.com/errata/RHSA-2019:3892https://access.redhat.com/errata/RHSA-2019:4352https://access.redhat.com/errata/RHSA-2020:0727https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.mdhttps://kb.cert.org/vuls/id/605641/https://kc.mcafee.com/corporate/index?page=content&id=SB10296https://lists.apache.org/thread.html/091b518265bce56a16af87b77c8cfacda902a02079e866f9fdf13b61%40%3Cusers.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/2653c56545573b528f3f6352a29eccaf498bd6fb2a6a59568d81a61d%40%3Cannounce.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3Ehttps://lists.apache.org/thread.html/ff5b0821a6985159a832ff6d1a4bd311ac07ecc7db1e2d8bab619107%40%3Cdev.trafficserver.apache.org%3Ehttps://lists.apache.org/thread.html/r99a625fb17032646d96cd23dec49603ff630e9318e44a686d63046bc%40%3Ccommits.cassandra.apache.org%3Ehttps://lists.apache.org/thread.html/rd31230d01fa6aad18bdadc0720acd1747e53690bd35f73a48e7a9b75%40%3Ccommits.cassandra.apache.org%3Ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/https://seclists.org/bugtraq/2019/Aug/24https://seclists.org/bugtraq/2019/Sep/18https://security.netapp.com/advisory/ntap-20190823-0005/https://support.f5.com/csp/article/K46011592https://support.f5.com/csp/article/K46011592?utm_source=f5support&%3Butm_medium=RSShttps://www.debian.org/security/2019/dsa-4520https://www.synology.com/security/advisory/Synology_SA_19_33
Preferred Score:
CVSSv3
CVSSv2
CVSSv3
CVSSv4
EPSS
VMScore
Recommendations:
CVE-2025-1496go-redisCVE-2025-24472physicalelevation of privilegeCVE-2025-30066local file inclusionCVE-2025-2553ollama/ollamaCVE-2024-13920ollamalanggenius/difyCVE-2025-0313
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