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Se encontr\u00f3 un error en Moby (Docker Engine) en el que el directorio de datos (normalmente \"/var/lib/docker\") conten\u00eda subdirectorios con permisos insuficientemente restringidos, lo que permit\u00eda a usuarios de Linux no privilegiados saltar el contenido del directorio y ejecutar programas. Cuando los contenedores inclu\u00edan programas ejecutables con bits de permiso extendidos (como \"setuid\"), los usuarios no privilegiados de Linux pod\u00edan detectar y ejecutar esos programas. Cuando el UID de un usuario de Linux no privilegiados en el host colisionaba con el propietario o el grupo de un archivo dentro de un contenedor, el usuario de Linux no privilegiados en el host pod\u00eda descubrir, leer y modificar esos archivos. Este bug ha sido corregido en Moby (Docker Engine) versi\u00f3n 20.10.9. Usuarios deber\u00edan actualizar a esta versi\u00f3n lo antes posible. 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{"bugzilla": {"description": "moby: data directory contains subdirectories with insufficiently restricted permissions, which could lead to directory traversal", "id": "2023448", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2023448"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-281", "details": ["Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade limit access to the host to trusted users. Limit access to host volumes to trusted containers.", "A file permissions vulnerability was found in the Moby (Docker Engine). The Moby data directory (usually /var/lib/docker) contains subdirectories with insufficiently restricted permissions, allowing unprivileged Linux users to traverse directory contents and execute programs. When the running container contains executable programs with the extended permission bits (like setuid), unprivileged Linux users can discover and execute those programs. Additionally, when the UID of an unprivileged Linux user on the host collides with the file owner or group inside a container, the unprivileged Linux user on the host can discover, read, and modify those files. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."], "name": "CVE-2021-41091", "package_state": [{"cpe": "cpe:/a:redhat:migration_toolkit_virtualization:2", "fix_state": "Affected", "impact": "low", "package_name": "migration-toolkit-virtualization/mtv-controller-rhel9", "product_name": "Migration Toolkit for Virtualization"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "impact": "low", "package_name": "rhacm2/agent-service-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/assisted-installer-agent-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/assisted-installer-reporter-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/assisted-installer-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/multicluster-operators-subscription-release-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/multicluster-operators-subscription-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "impact": "low", "package_name": "rhacm2/search-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "impact": "low", "package_name": "rhacm-assisted-service-container", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:3", "fix_state": "Not affected", "package_name": "advanced-cluster-security/rhacs-rhel8-operator", "product_name": "Red Hat Advanced Cluster Security 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "docker", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Will not fix", "impact": "low", "package_name": "openshift4-wincw/windows-machine-config-rhel8-operator", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "impact": "low", "package_name": "openshift-compliance-openscap-container", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "impact": "low", "package_name": "openshift-compliance-operator-container", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "impact": "low", "package_name": "openshift-file-integrity-operator-container", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:assisted_installer:", "fix_state": "Out of support scope", "impact": "low", "package_name": "rhai-tech-preview/assisted-installer-agent-rhel8", "product_name": "Red Hat OpenShift Container Platform Assisted Installer"}, {"cpe": "cpe:/a:redhat:assisted_installer:", "fix_state": "Affected", "impact": "low", "package_name": "rhai-tech-preview/assisted-installer-reporter-rhel8", "product_name": "Red Hat OpenShift Container Platform Assisted Installer"}, {"cpe": "cpe:/a:redhat:assisted_installer:", "fix_state": "Not affected", "impact": "low", "package_name": "rhai-tech-preview/assisted-installer-rhel8", "product_name": "Red Hat OpenShift Container Platform Assisted Installer"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:2", "fix_state": "Not affected", "package_name": "vm-import-operator-container", "product_name": "Red Hat OpenShift Virtualization 2"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Not affected", "package_name": "container-native-virtualization/vm-import-operator-rhel8", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Not affected", "package_name": "quay/quay-builder-rhel8", "product_name": "Red Hat Quay 3"}], "public_date": "2021-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-41091\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-41091\nhttps://github.com/moby/moby/commit/f0ab919f518c47240ea0e72d0999576bb8008e64\nhttps://github.com/moby/moby/security/advisories/GHSA-3fwx-pjgw-3558"], "statement": "In the OpenShift Container Platform (OCP),  the Migration Toolkit for Virtualization (MTV) and the Red Hat Advanced Cluster Management for Kubernetes (RHACM) some components bundle github.com/moby/moby. However, successful exploitation requires direct access to the cluster hosts, which is not allowed by default and is available only to the cluster administrators, so the impact of this vulnerability to these components is Low.\nStarting in OCP 4.7 the github.com/moby/moby is not shipped anymore in the openshift4-wincw/windows-machine-config-rhel8-operator component (Red Hat OpenShift Container Platform for Windows Containers version 2) , hence this component is marked as Will not fix.", "threat_severity": "Moderate"}