CVE-2019-9946 (GCVE-0-2019-9946)
Vulnerability from cvelistv5 – Published: 2019-04-02 17:22 – Updated: 2024-08-04 22:10
VLAI
EPSS
VEX
Summary
Cloud Native Computing Foundation (CNCF) CNI (Container Networking Interface) 0.7.4 has a network firewall misconfiguration which affects Kubernetes. The CNI 'portmap' plugin, used to setup HostPorts for CNI, inserts rules at the front of the iptables nat chains; which take precedence over the KUBE- SERVICES chain. Because of this, the HostPort/portmap rule could match incoming traffic even if there were better fitting, more specific service definition rules like NodePorts later in the chain. The issue is fixed in CNI 0.7.5 and Kubernetes 1.11.9, 1.12.7, 1.13.5, and 1.14.0.
Severity
7.5 (High)
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/containernetworking/plugins/pu… | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2019041… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHBA-2019:0862 | vendor-advisoryx_refsource_REDHAT |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Date Public
2019-03-28 00:00
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"value": "La interfaz de red del contenedor (CNI) de Cloud Native Computing Foundation (CNCF), en su versi\u00f3n 0.7.4, tiene una configuraci\u00f3n incorrecta en el firewall de red que afecta a Kubernetes. El plugin \"portmat\" de la CNI, utilizado para configurar los puertos de host para la CNI, introduce reglas al frente de las cadenas de iptables NAT. Esto tiene la precedencia sobre la cadena KUBE- SERVICES. Debido a esto, la regla HostPort/portmap podr\u00eda coincidir con el tr\u00e1fico entrante aunque hubiera un ajuste mejor y reglas de definici\u00f3n del servicio m\u00e1s espec\u00edficas como NodePorts m\u00e1s adelante en la cadena. Este problema est\u00e1 resuelto en la versi\u00f3n 0.7.5 de CNI y en las versiones 1.11.9, 1.12.7, 1.13.5 y 1.14.0 de Kubernetes."
}
],
"id": "CVE-2019-9946",
"lastModified": "2024-11-21T04:52:38.937",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2019-04-02T18:30:26.583",
"references": [
{
"source": "cve@mitre.org",
"url": "https://access.redhat.com/errata/RHBA-2019:0862"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272"
},
{
"source": "cve@mitre.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/"
},
{
"source": "cve@mitre.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20190416-0002/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHBA-2019:0862"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20190416-0002/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-670"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T16:08:04+00:00",
"cve": "CVE-2019-9946",
"id": "CVE-2019-9946",
"initial_release_date": "2019-03-28T00:00:00+00:00",
"product_status:fixed": "167",
"product_status:known_affected": "2",
"product_status:known_not_affected": "114",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kubernetes: Incorrect rule injection in CNI portmap plugin",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9946.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-14T00:01:48Z",
"cve": "CVE-2019-9946",
"id": "CVE-2019-9946",
"initial_release_date": "2023-02-15T04:13:54Z",
"product_status:known_not_affected": "35",
"product_status:recommended": "21",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2019-9946",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-9946.json",
"version": "12"
}
}
}
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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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