FKIE_CVE-2019-17569
Vulnerability from fkie_nvd - Published: 2020-02-24 22:15 - Updated: 2026-08-25 16:28
Severity
Summary
The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| apache | tomcat | * | |
| apache | tomcat | * | |
| apache | tomcat | * | |
| apache | tomee | 7.0.7 | |
| opensuse | leap | 15.1 | |
| netapp | data_availability_services | - | |
| netapp | oncommand_system_manager | * | |
| debian | debian_linux | 9.0 | |
| debian | debian_linux | 10.0 | |
| oracle | agile_engineering_data_management | 6.2.1.0 | |
| oracle | agile_product_lifecycle_management | 9.3.3 | |
| oracle | agile_product_lifecycle_management | 9.3.5 | |
| oracle | agile_product_lifecycle_management | 9.3.6 | |
| oracle | communications_instant_messaging_server | 10.0.1.4.0 | |
| oracle | health_sciences_empirica_inspections | 1.0.1.2 | |
| oracle | health_sciences_empirica_signal | 7.3.3 | |
| oracle | hospitality_guest_access | 4.2.0 | |
| oracle | hospitality_guest_access | 4.2.1 | |
| oracle | instantis_enterprisetrack | * | |
| oracle | mysql_enterprise_monitor | * | |
| oracle | mysql_enterprise_monitor | * | |
| oracle | transportation_management | 6.3.7 | |
| oracle | workload_manager | 12.2.0.1 | |
| oracle | workload_manager | 18c | |
| oracle | workload_manager | 19c |
{
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely."
},
{
"lang": "es",
"value": "La refactorizaci\u00f3n presente en Apache Tomcat versiones 9.0.28 hasta 9.0.30, versiones 8.5.48 hasta 8.5.50 y versiones 7.0.98 hasta 7.0.99, introdujo una regresi\u00f3n. El resultado de la regresi\u00f3n fue que los encabezados Transfer-Encoding no v\u00e1lidos fueron procesados incorrectamente, conllevando a una posibilidad de Tr\u00e1fico No Autorizado de Peticiones HTTP si Tomcat se encontraba detr\u00e1s de un proxy inverso que manejaba incorrectamente el encabezado Transfer-Encoding no v\u00e1lido de una manera particular. Tal proxy inverso es considerado improbable."
}
],
"id": "CVE-2019-17569",
"lastModified": "2026-08-25T16:28:27.310",
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"acInsufInfo": false,
"baseSeverity": "MEDIUM",
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
"version": "2.0"
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"exploitabilityScore": 8.6,
"impactScore": 4.9,
"obtainAllPrivilege": false,
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"published": "2020-02-24T22:15:11.903",
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}
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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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