Vulnerability Intelligence Report
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service
CVE-2019-9515
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.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:87.81%
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 | 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_container_platform | 4.1 |
| redhat | openshift_service_mesh | 1.0 |
| redhat | openstack | 14 |
| redhat | quay | 3.0.0 |
| redhat | single_sign-on | 7.3 |
| redhat | software_collections | 1.0 |
| redhat | enterprise_linux | 8.0 |
| oracle | graalvm | 19.2.0 |
| mcafee | web_gateway | all |
| f5 | big-ip_local_traffic_manager | all |
| nodejs | node.js | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
87.806%
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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