Vulnerability Intelligence Report
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
CVE-2019-9511
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.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:59.55%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-400 ↗CWE-400 Uncontrolled Resource Consumption
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| apple | swiftnio | all |
| apple | mac_os_x | all |
| canonical | ubuntu_linux | 16.04, 18.04, 19.04 |
| apache | traffic_server | all |
| debian | debian_linux | 9.0, 10.0 |
| synology | skynas | all |
| synology | diskstation_manager | 6.2 |
| synology | vs960hd_firmware | all |
| synology | vs960hd | all |
| fedoraproject | fedora | 29, 30 |
| opensuse | leap | 15.0, 15.1 |
| redhat | jboss_core_services | 1.0 |
| redhat | jboss_enterprise_application_platform | 7.2.0, 7.3.0 |
| redhat | openshift_service_mesh | 1.0 |
| redhat | quay | 3.0.0 |
| redhat | software_collections | 1.0 |
| redhat | enterprise_linux | 8.0 |
| oracle | graalvm | 19.2.0 |
| mcafee | web_gateway | all |
| f5 | nginx | all |
| oracle | enterprise_communications_broker | 3.1.0, 3.2.0 |
| nodejs | node.js | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
59.547%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | CERT/CC · CERT · USA |
| Reserved | 2019-03-01T00:00:00 |
| Published | 2019-08-13T20:50:59 |
| Last Updated | 2024-08-04T21:54:44 |
Community Chatter & Buzz