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Status published
High
CVE-2019-9511
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
Vulnerability Description
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Thanks to Jonathan Looney of Netflix for reporting this vulnerability.
References
- https://kb.cert.org/vuls/id/605641/
- https://usn.ubuntu.com/4099-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TAZZEVTCN2B4WT6AIBJ7XGYJMBTORJU5/
- https://seclists.org/bugtraq/2019/Aug/40
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZLUYPYY3RX4ZJDWZRJIKSULYRJ4PXW7/
- https://www.debian.org/security/2019/dsa-4505
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JUBYAF6ED3O4XCHQ5C2HYENJLXYXZC4M/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/
- https://seclists.org/bugtraq/2019/Sep/1
- https://www.debian.org/security/2019/dsa-4511
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POPAEC4FWL4UU4LDEGPY5NPALU24FFQD/
- https://access.redhat.com/errata/RHSA-2019:2692
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
- https://access.redhat.com/errata/RHSA-2019:2745
- https://access.redhat.com/errata/RHSA-2019:2746
- https://access.redhat.com/errata/RHSA-2019:2775
- https://access.redhat.com/errata/RHSA-2019:2799
- https://access.redhat.com/errata/RHSA-2019:2925
- https://access.redhat.com/errata/RHSA-2019:2939
- https://access.redhat.com/errata/RHSA-2019:2949
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00005.html
- https://access.redhat.com/errata/RHSA-2019:2955
- https://access.redhat.com/errata/RHSA-2019:2966
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.html
- https://access.redhat.com/errata/RHSA-2019:3041
- https://access.redhat.com/errata/RHSA-2019:3933
- https://access.redhat.com/errata/RHSA-2019:3935
- https://access.redhat.com/errata/RHSA-2019:3932
- 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://www.debian.org/security/2020/dsa-4669
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
- https://www.synology.com/security/advisory/Synology_SA_19_33
- https://support.f5.com/csp/article/K02591030
- https://security.netapp.com/advisory/ntap-20190823-0002/
- https://security.netapp.com/advisory/ntap-20190823-0005/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10296
- https://support.f5.com/csp/article/K02591030?utm_source=f5support&%3Butm_medium=RSS
- https://www.oracle.com/security-alerts/cpujan2021.html
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Affected Vendor
apple
View all reports →Affected Software
swiftnio, traffic server, ubuntu linux, debian linux, skynas, diskstation manager, vs960hd firmware, fedora, leap, jboss core services, jboss enterprise application platform, openshift service mesh, quay, software collections, enterprise linux, graalvm, web gateway, nginx, enterprise communications broker, node.js
Vulnerable Versions:
1.0.0, 6.0.0, 7.0.0, 8.0.0, 16.04, 18.04, 19.04, 9.0, 10.0, 6.2, 29, 30, 15.0, 15.1, 1.0, 7.2.0, 7.3.0, 3.0.0, 8.0, 19.2.0, 7.7.2.0, 7.8.2.0, 8.1.0, 1.9.5, 1.17.0, 3.1.0, 3.2.0, 8.9.0, 10.0.0, 10.13.0, 12.0.0
Timeline
Official Publish:
August 13th, 2019
Last Modified:
August 4th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H