Vulnerability Intelligence Report
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service
CVE-2019-9517
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:27.89%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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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 | http_server | all |
| 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 | communications_element_manager | 8.0.0, 8.1.0, 8.1.1, 8.2.0 |
| oracle | graalvm | 19.2.0 |
| oracle | instantis_enterprisetrack | all |
| oracle | retail_xstore_point_of_service | 7.1 |
| mcafee | web_gateway | all |
| netapp | clustered_data_ontap | all |
| nodejs | node.js | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
27.890%
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 |
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