Detections
Analytics
CVE-2019-9518
high
Description
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.
From the Tenable Blog
Multiple Denial of Service (DoS) Vulnerabilities in HTTP/2 Disclosed (CVE-2019-9511, CVE-2019-9518)
Published: 2019-08-14
A variety of Denial of Service vulnerabilities were found in third-party implementations of HTTP/2.
References
https://www.synology.com/security/advisory/Synology_SA_19_33
https://www.debian.org/security/2019/dsa-4520
https://support.f5.com/csp/article/K46011592
https://security.netapp.com/advisory/ntap-20190823-0005/
https://seclists.org/bugtraq/2019/Sep/18
https://seclists.org/bugtraq/2019/Aug/24
https://kc.mcafee.com/corporate/index?page=content&id=SB10296
https://kb.cert.org/vuls/id/605641/
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://access.redhat.com/errata/RHSA-2020:0727
https://access.redhat.com/errata/RHSA-2019:4352
https://access.redhat.com/errata/RHSA-2019:3892
https://access.redhat.com/errata/RHSA-2019:2955
https://access.redhat.com/errata/RHSA-2019:2939
https://access.redhat.com/errata/RHSA-2019:2925
http://seclists.org/fulldisclosure/2019/Aug/16
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html