FKIE_CVE-2019-0199
Vulnerability from fkie_nvd - Published: 2019-04-10 15:29 - Updated: 2026-06-17 02:07
Severity
Summary
The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| apache | tomcat | * | |
| apache | tomcat | * | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 | |
| apache | tomcat | 9.0.0 |
{
"affected": [
{
"affectedData": [
{
"product": "Apache Tomcat",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Apache Tomcat 9.0.0.M1 to 9.0.14, 8.5.0 to 8.5.37"
}
]
}
],
"source": "security@apache.org"
}
],
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},
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API\u0027s blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS."
},
{
"lang": "es",
"value": "La implementaci\u00f3n HTTP/2 en Apache Tomcat desde 9.0.0.M1 hasta 9.0.14 y desde 8.5.0 hasta 8.5.37 aceptaba flujos con n\u00fameros excesivos de tramas SETTINS y permit\u00eda a los clientes mantener flujos abiertos sin datos de lectura/escritura o solicitud/respuesta. Manteniendo flujos abiertos para peticiones que utilizaban bloqueo I/O en el Servlet API\u00b4s, los clientes eran capaces de hacer que los hilos (threads) del lado del servidor se bloquearan, provocando el agotamiento de los hilos y la denegaci\u00f3n del servicio (DoS)."
}
],
"id": "CVE-2019-0199",
"lastModified": "2026-06-17T02:07:56.857",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
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"source": "nvd@nist.gov",
"type": "Primary"
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]
},
"published": "2019-04-10T15:29:00.390",
"references": [
{
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"url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html"
},
{
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},
{
"source": "security@apache.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html"
},
{
"source": "security@apache.org",
"url": "http://www.securityfocus.com/bid/107674"
},
{
"source": "security@apache.org",
"url": "https://access.redhat.com/errata/RHSA-2019:3929"
},
{
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"url": "https://access.redhat.com/errata/RHSA-2019:3931"
},
{
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"url": "https://lists.apache.org/thread.html/158ab719cf60448ddbb074798f09152fdb572fc8f781e70a56118d1a%40%3Cdev.tomcat.apache.org%3E"
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{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NPHQEL5AQ6LZSZD2Y6TYZ4RC3WI7NXJ3/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQTZ5BJ5F4KV6N53SGNKSW3UY5DBIQ46/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://seclists.org/bugtraq/2019/Dec/43"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20190419-0001/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://support.f5.com/csp/article/K17321505"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.debian.org/security/2019/dsa-4596"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.oracle.com/security-alerts/cpujan2020.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
}
],
"sourceIdentifier": "security@apache.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-400"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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