Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service
At a glance
- Source
- NVD
- EPSS
- EPSS 87.29 % · percentile 100 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- certcc
- NVD status
- Modified
Description
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
- CWE-770 — Allocation of Resources Without Limits or Throttling
References
- https://kb.cert.org/vuls/id/605641/
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
- https://lists.apache.org/thread.html/bde52309316ae798186d783a5e29f4ad1527f61c9219a289d0eee0a7%40%3Cdev.trafficserver.apache.org%3E
- 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://seclists.org/bugtraq/2019/Aug/24
- http://seclists.org/fulldisclosure/2019/Aug/16
- https://www.synology.com/security/advisory/Synology_SA_19_33
- https://support.f5.com/csp/article/K50233772
- https://security.netapp.com/advisory/ntap-20190823-0005/
- 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/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/
- https://seclists.org/bugtraq/2019/Aug/43
- https://www.debian.org/security/2019/dsa-4508
- https://www.debian.org/security/2019/dsa-4520
- https://seclists.org/bugtraq/2019/Sep/18
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10296
- https://access.redhat.com/errata/RHSA-2019:2766
- https://access.redhat.com/errata/RHSA-2019:2796
- https://access.redhat.com/errata/RHSA-2019:2861
- 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://support.f5.com/csp/article/K50233772?utm_source=f5support&%3Butm_medium=RSS
- https://access.redhat.com/errata/RHSA-2019:3892
- https://access.redhat.com/errata/RHSA-2019:4018
- https://access.redhat.com/errata/RHSA-2019:4019
- https://access.redhat.com/errata/RHSA-2019:4021
- https://access.redhat.com/errata/RHSA-2019:4020
- https://access.redhat.com/errata/RHSA-2019:4045
- https://access.redhat.com/errata/RHSA-2019:4042
- https://access.redhat.com/errata/RHSA-2019:4040
- https://access.redhat.com/errata/RHSA-2019:4041
- https://access.redhat.com/errata/RHSA-2019:4352
- https://access.redhat.com/errata/RHSA-2020:0727
- https://usn.ubuntu.com/4308-1/
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | certcc |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · cret@cert.org (Secondary) |
| CVSS 2.0 | HIGH 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-18887
- GCVE · GCVE-0-2019-9515
CERT-FR advisories
- CERTFR-2026-AVI-0109 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2020-AVI-175 — Multiples vulnérabilités dans IBM WebSphere Liberty · cert.ssi.gouv.fr
- CERTFR-2020-AVI-111 — Multiples vulnérabilités dans IBM WebSphere Liberty · cert.ssi.gouv.fr
- CERTFR-2020-AVI-064 — Multiples vulnérabilités dans IBM Control Center · cert.ssi.gouv.fr
- CERTFR-2019-AVI-388 — Multiples vulnérabilités dans Apple SwiftNIO · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:apple:swiftnio:*:*:*:*:*:*:*:*≥ 1.0.0 ≤ 1.4.0cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*≥ 6.0.0 ≤ 6.2.3cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*≥ 7.0.0 ≤ 7.1.6cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*≥ 8.0.0 ≤ 8.0.3cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:*cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:4.1:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_service_mesh:1.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:openstack:14:*:*:*:*:*:*:*cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:single_sign-on:7.3:*:*:*:*:*:*:*cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:graalvm:19.2.0:*:*:*:enterprise:*:*:*cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*≥ 7.7.2.0 < 7.7.2.24cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*≥ 7.8.2.0 < 7.8.2.13cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*≥ 8.1.0 < 8.2.0cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 11.6.1 < 11.6.5.1cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 12.1.0 < 12.1.5.1cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 13.1.0 < 13.1.3.2cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 14.0.0 < 14.0.1.1cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 14.1.0 < 14.1.2.1cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*≥ 15.0.0 < 15.0.1.1cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*≥ 8.0.0 ≤ 8.8.1cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*≥ 8.9.0 < 8.16.1cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*≥ 10.0.0 ≤ 10.12.0cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*≥ 10.13.0 < 10.16.3- +1 more
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |