CVE-2020-26278

{"containers": {"cna": {"affected": [{"product": "weave", "vendor": "weaveworks", "versions": [{"status": "affected", "version": "< 2.8.0"}]}], "descriptions": [{"lang": "en", "value": "Weave Net is open source software which creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery. Weave Net before version 2.8.0 has a vulnerability in which can allow an attacker to take over any host in the cluster. Weave Net is supplied with a manifest that runs pods on every node in a Kubernetes cluster, which are responsible for managing network connections for all other pods in the cluster. This requires a lot of power over the host, and the manifest sets `privileged: true`, which gives it that power. It also set `hostPID: true`, which gave it the ability to access all other processes on the host, and write anywhere in the root filesystem of the host. This setting was not necessary, and is being removed. You are only vulnerable if you have an additional vulnerability (e.g. a bug in Kubernetes) or misconfiguration that allows an attacker to run code inside the Weave Net pod, No such bug is known at the time of release, and there are no known instances of this being exploited. Weave Net 2.8.0 removes the hostPID setting and moves CNI plugin install to an init container. Users who do not update to 2.8.0 can edit the hostPID line in their existing DaemonSet manifest to say false instead of true, arrange some other way to install CNI plugins (e.g. Ansible) and remove those mounts from the DaemonSet manifest."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-250", "description": "CWE-250 Execution with Unnecessary Privileges", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-01-20T22:10:17.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/weaveworks/weave/pull/3876"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280"}], "source": {"advisory": "GHSA-pg3p-v8c6-c6h3", "discovery": "UNKNOWN"}, "title": "Weave Net Pods running in host PID namespace can be used to escalate other Kubernetes vulnerabilities", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2020-26278", "STATE": "PUBLIC", "TITLE": "Weave Net Pods running in host PID namespace can be used to escalate other Kubernetes vulnerabilities"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "weave", "version": {"version_data": [{"version_value": "< 2.8.0"}]}}]}, "vendor_name": "weaveworks"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Weave Net is open source software which creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery. Weave Net before version 2.8.0 has a vulnerability in which can allow an attacker to take over any host in the cluster. Weave Net is supplied with a manifest that runs pods on every node in a Kubernetes cluster, which are responsible for managing network connections for all other pods in the cluster. This requires a lot of power over the host, and the manifest sets `privileged: true`, which gives it that power. It also set `hostPID: true`, which gave it the ability to access all other processes on the host, and write anywhere in the root filesystem of the host. This setting was not necessary, and is being removed. You are only vulnerable if you have an additional vulnerability (e.g. a bug in Kubernetes) or misconfiguration that allows an attacker to run code inside the Weave Net pod, No such bug is known at the time of release, and there are no known instances of this being exploited. Weave Net 2.8.0 removes the hostPID setting and moves CNI plugin install to an init container. Users who do not update to 2.8.0 can edit the hostPID line in their existing DaemonSet manifest to say false instead of true, arrange some other way to install CNI plugins (e.g. Ansible) and remove those mounts from the DaemonSet manifest."}]}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-250 Execution with Unnecessary Privileges"}]}]}, "references": {"reference_data": [{"name": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3", "refsource": "CONFIRM", "url": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3"}, {"name": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720", "refsource": "MISC", "url": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720"}, {"name": "https://github.com/weaveworks/weave/pull/3876", "refsource": "MISC", "url": "https://github.com/weaveworks/weave/pull/3876"}, {"name": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280", "refsource": "MISC", "url": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280"}]}, "source": {"advisory": "GHSA-pg3p-v8c6-c6h3", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T15:56:04.069Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/weaveworks/weave/pull/3876"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2020-26278", "datePublished": "2021-01-20T22:10:18.000Z", "dateReserved": "2020-10-01T00:00:00.000Z", "dateUpdated": "2024-08-04T15:56:04.069Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "weave", "vendor": "weaveworks", "versions": [{"status": "affected", "version": "< 2.8.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:weave:weave:*:*:*:*:*:*:*:*", "matchCriteriaId": "7E85E93E-BE67-4D46-8E49-3A2F64CD82FB", "versionEndExcluding": "2.8.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Weave Net is open source software which creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery. Weave Net before version 2.8.0 has a vulnerability in which can allow an attacker to take over any host in the cluster. Weave Net is supplied with a manifest that runs pods on every node in a Kubernetes cluster, which are responsible for managing network connections for all other pods in the cluster. This requires a lot of power over the host, and the manifest sets `privileged: true`, which gives it that power. It also set `hostPID: true`, which gave it the ability to access all other processes on the host, and write anywhere in the root filesystem of the host. This setting was not necessary, and is being removed. You are only vulnerable if you have an additional vulnerability (e.g. a bug in Kubernetes) or misconfiguration that allows an attacker to run code inside the Weave Net pod, No such bug is known at the time of release, and there are no known instances of this being exploited. Weave Net 2.8.0 removes the hostPID setting and moves CNI plugin install to an init container. Users who do not update to 2.8.0 can edit the hostPID line in their existing DaemonSet manifest to say false instead of true, arrange some other way to install CNI plugins (e.g. Ansible) and remove those mounts from the DaemonSet manifest."}, {"lang": "es", "value": "Weave Net es un software de c\u00f3digo abierto que crea una red virtual que conecta contenedores Docker a trav\u00e9s de m\u00faltiples hosts y permite su detecci\u00f3n autom\u00e1tica. Weave Net versiones anteriores a 2.8.0, presenta una vulnerabilidad en la que puede permitir a un atacante tomar el control de cualquier host del cl\u00faster. Weave Net es suministrado con un manifiesto que ejecuta pods en cada nodo de un cl\u00faster de Kubernetes, que son responsables de administrar las conexiones de red para todos los dem\u00e1s pods del cl\u00faster. Esto requiere mucho poder sobre el host, y el manifiesto establece \"privileged: true\", lo que le otorga ese poder. Tambi\u00e9n configur\u00f3 \"hostPID: true\", lo que le dio la capacidad de acceder a todos los dem\u00e1s procesos en el host y escribir en cualquier lugar del sistema de archivos root del host. Esta configuraci\u00f3n no era necesaria y ha sido eliminada. Solo eres vulnerable si presentas una vulnerabilidad adicional (por ejemplo,&#xa0;un error en Kubernetes) o una mala configuraci\u00f3n que permite a un atacante ejecutar c\u00f3digo dentro del pod de Weave Net. No es conocido ning\u00fan error de este tipo en el momento de la publicaci\u00f3n, y no se conocen casos en los que han sido explotadas. Weave Net versi\u00f3n 2.8.0, elimina la configuraci\u00f3n de hostPID y mueve la instalaci\u00f3n del plugin CNI hacia un contenedor de inicio. Los usuarios que no actualicen a la versi\u00f3n 2.8.0, pueden editar la l\u00ednea hostPID en su manifiesto DaemonSet para decir falso en lugar de verdadero, organizar alguna otra forma de instalar plugins CNI (por ejemplo, Ansible) y eliminar esos montajes del manifiesto DaemonSet"}], "id": "CVE-2020-26278", "lastModified": "2026-06-17T03:07:59.060", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:A/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 5.5, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-01-20T22:15:11.097", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/pull/3876"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/blob/master/CHANGELOG.md#release-280"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/commit/a0ac81b3b4cae6d0dcaf3732fd91cedefc89f720"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/weaveworks/weave/pull/3876"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/weaveworks/weave/security/advisories/GHSA-pg3p-v8c6-c6h3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-250"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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