CVE-2020-8554 (GCVE-0-2020-8554)
Vulnerability from cvelistv5 – Published: 2021-01-21 17:09 – Updated: 2026-06-01 21:44
VLAI
EPSS
VEX
Title
Kubernetes man in the middle using LoadBalancer or ExternalIPs
Summary
Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.
Severity
6.3 (Medium)
CWE
- CWE-283 - Unverified Ownership
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://kubernetes.io/blog/2026/05/26/reconciling… | x_refsource_MISC |
| https://groups.google.com/g/kubernetes-security-a… | x_refsource_MISC |
| https://github.com/kubernetes/kubernetes/issues/97076 | x_refsource_MISC |
| https://lists.apache.org/thread.html/rcafa485d635… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r0c76b3d0be3… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/rdb223e1b82e… | mailing-listx_refsource_MLIST |
| https://lists.apache.org/thread.html/r1975078e44d… | mailing-listx_refsource_MLIST |
| https://www.oracle.com//security-alerts/cpujul2021.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Kubernetes | Kubernetes |
Affected:
0 , < *
(semver)
|
guessed |
Date Public
2020-12-07 00:00
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"lastModified": "2024-11-21T05:39:01.370",
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"id": "msrc_CVE-2020-8554",
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"nvd": "{\"cve\":{\"id\":\"CVE-2020-8554\",\"sourceIdentifier\":\"jordan@liggitt.net\",\"published\":\"2021-01-21T17:15:13.843\",\"lastModified\":\"2026-06-01T23:16:13.740\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.\"},{\"lang\":\"es\",\"value\":\"El servidor de la API de Kubernetes en todas las versiones permite a un atacante que puede crear un servicio ClusterIP y establecer el campo spec.externalIPs, interceptar el tr\u00e1fico a esa direcci\u00f3n IP. Adicionalmente, un atacante que sea capaz de parchear el estado (que se considera una operaci\u00f3n privilegiada y no se debe t\u00edpicamente otorgar a los usuarios) de un servicio LoadBalancer puede configurar el status.loadBalancer.ingress.ip con un efecto similar\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":6.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":3.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":5.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.6,\"impactScore\":3.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:S/C:P/I:P/A:P\",\"baseScore\":6.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":6.8,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"jordan@liggitt.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-283\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"044D3402-749F-4BEA-9F7E-16F7839654FE\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.2.1:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"ADE6EF8F-1F05-429B-A916-76FDB20CEB81\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B4367D9B-BF81-47AD-A840-AC46317C774D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.14.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"0AB059F2-FEC4-4180-8A90-39965495055E\"}]}]}],\"references\":[{\"url\":\"https://github.com/kubernetes/kubernetes/issues/97076\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/\",\"source\":\"jordan@liggitt.net\"},{\"url\":\"https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E\",\"source\":\"jordan@liggitt.net\"},{\"url\":\"https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E\",\"source\":\"jordan@liggitt.net\"},{\"url\":\"https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E\",\"source\":\"jordan@liggitt.net\"},{\"url\":\"https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E\",\"source\":\"jordan@liggitt.net\"},{\"url\":\"https://www.oracle.com//security-alerts/cpujul2021.html\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuapr2022.html\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpujan2022.html\",\"source\":\"jordan@liggitt.net\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/kubernetes/kubernetes/issues/97076\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.oracle.com//security-alerts/cpujul2021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpuapr2022.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://www.oracle.com/security-alerts/cpujan2022.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-01T23:25:37+00:00",
"cve": "CVE-2020-8554",
"id": "CVE-2020-8554",
"initial_release_date": "2020-12-07T00:00:00+00:00",
"product_status:fixed": "24",
"product_status:known_not_affected": "68",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kubernetes: MITM using LoadBalancer or ExternalIPs",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-8554.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2025-02-17T06:47:20Z",
"cve": "CVE-2020-8554",
"id": "CVE-2020-8554",
"initial_release_date": "2023-02-15T04:01:15Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-8554",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-8554.json",
"version": "5"
}
}
}
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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.
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.
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