CVE-2019-9512

Name: CVE-2019-9512
Creator: NVD / NIST
Published: 2019-08-13T21:15:12.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 83.43%

Last modified Jun 17, 2026

CVE-2019-9512 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. EPSS estimates a 83.43% chance of exploitation in the next 30 days.

Description

Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

83.43%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Swiftnio	>= 1.0.0, <= 1.4.0
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
Debian	Debian Linux	10.0
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

References

https://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.htmlMailing List, Third Party Advisory
https://seclists.org/fulldisclosure/2019/Aug/16Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/08/20/1Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2594Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2661Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2682Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2690Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2726Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2766Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2769Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2796Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2861Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2925Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2939Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2955Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2966Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3131Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3245Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3265Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3892Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3906Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4018Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4019Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4020Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4021Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4040Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4041Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4042Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4045Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4269Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4273Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4352Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0406Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0727Third Party Advisory
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.mdThird Party Advisory
https://kb.cert.org/vuls/id/605641/Third Party Advisory, US Government Resource
https://kc.mcafee.com/corporate/index?page=content&id=SB10296Third Party Advisory
https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/12/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/
https://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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/
https://seclists.org/bugtraq/2019/Aug/24Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/31Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/43Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Sep/18Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0001/Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0004/Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0005/Third Party Advisory
https://support.f5.com/csp/article/K98053339Third Party Advisory
https://support.f5.com/csp/article/K98053339?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4503Third Party Advisory
https://www.debian.org/security/2019/dsa-4508Third Party Advisory
https://www.debian.org/security/2019/dsa-4520Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_33Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-08/msg00076.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00002.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00011.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00021.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlMailing List, Third Party Advisory
https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00038.htmlMailing List, Third Party Advisory
https://seclists.org/fulldisclosure/2019/Aug/16Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/08/20/1Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2594Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2661Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2682Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2690Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2726Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2766Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2769Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2796Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2861Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2925Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2939Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2955Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2966Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3131Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3245Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3265Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3892Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3906Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4018Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4019Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4020Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4021Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4040Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4041Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4042Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4045Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4269Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4273Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4352Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0406Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0727Third Party Advisory
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.mdThird Party Advisory
https://kb.cert.org/vuls/id/605641/Third Party Advisory, US Government Resource
https://kc.mcafee.com/corporate/index?page=content&id=SB10296Third Party Advisory
https://lists.apache.org/thread.html/392108390cef48af647a2e47b7fd5380e050e35ae8d1aa2030254c04%40%3Cusers.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/ad3d01e767199c1aed8033bb6b3f5bf98c011c7c536f07a5d34b3c19%40%3Cannounce.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/12/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BBP27PZGSY6OP6D26E5FW4GZKBFHNU7/
https://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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYO6E3H34C346D2E443GLXK7OK6KIYIQ/
https://seclists.org/bugtraq/2019/Aug/24Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/31Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/43Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Sep/18Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0001/Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0004/Third Party Advisory
https://security.netapp.com/advisory/ntap-20190823-0005/Third Party Advisory
https://support.f5.com/csp/article/K98053339Third Party Advisory
https://support.f5.com/csp/article/K98053339?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/4308-1/Third Party Advisory
https://www.debian.org/security/2019/dsa-4503Third Party Advisory
https://www.debian.org/security/2019/dsa-4508Third Party Advisory
https://www.debian.org/security/2019/dsa-4520Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_33Third Party Advisory

Timeline

Published: Aug 13, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9512?

How severe is CVE-2019-9512?

CVE-2019-9512 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 83.43% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9512?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST