HIGH
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.
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
http://seclists.org/fulldisclosure/2019/Aug/16
https://access.redhat.com/errata/RHSA-2019:2925
https://access.redhat.com/errata/RHSA-2019:2939
https://access.redhat.com/errata/RHSA-2019:2955
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://kb.cert.org/vuls/id/605641/
https://kc.mcafee.com/corporate/index?page=content&id=SB10296
https://lists.apache.org/thread.html/[email protected]%3Cusers.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cannounce.trafficserver.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cdev.trafficserver.apache.org%3E
https://seclists.org/bugtraq/2019/Aug/24
https://seclists.org/bugtraq/2019/Sep/18
https://security.netapp.com/advisory/ntap-20190823-0005/
https://support.f5.com/csp/article/K46011592
https://support.f5.com/csp/article/K46011592?utm_source=f5support&utm_medium=RSS
https://www.debian.org/security/2019/dsa-4520
https://www.synology.com/security/advisory/Synology_SA_19_33
Source: MITRE
Published: 2019-08-13
Updated: 2019-08-23
Type: CWE-400
Base Score: 7.8
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 10
Severity: HIGH
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH