Описание
KubeVirt is a virtual machine management add-on for Kubernetes. In versions before 1.5.3 and 1.6.1, the virt-handler does not verify whether the launcher-sock is a symlink or a regular file. This oversight can be exploited, for example, to change the ownership of arbitrary files on the host node to the unprivileged user with UID 107 (the same user used by virt-launcher) thus, compromising the CIA (Confidentiality, Integrity and Availability) of data on the host. To successfully exploit this vulnerability, an attacker should be in control of the file system of the virt-launcher pod. This vulnerability is fixed in 1.5.3 and 1.6.1.
A file path handling flaw has been discovered in KubeVirt. It is possible to trick the virt-handler component into changing the ownership of arbitrary files on the host node to the unprivileged user with UID 107 due to mishandling of symlinks when determining the root mount of a virt-launcher pod. To successfully exploit this vulnerability, an attacker should be in control of the file system of the virt-launcher pod.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/kubemacpool-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/kubevirt-tekton-tasks-create-datavolume-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/kubevirt-tekton-tasks-disk-virt-customize-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/mtq-controller-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/mtq-lock-server-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/mtq-operator-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/ocp-virt-validation-checkup-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/passt-network-binding-plugin-cni-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/passt-network-binding-plugin-sidecar-rhel9 | Fix deferred | ||
| Red Hat OpenShift Virtualization 4 | container-native-virtualization/sidecar-shim-rhel9 | Fix deferred |
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Дополнительная информация
Статус:
EPSS
5 Medium
CVSS3
Связанные уязвимости
KubeVirt is a virtual machine management add-on for Kubernetes. In versions before 1.5.3 and 1.6.1, the virt-handler does not verify whether the launcher-sock is a symlink or a regular file. This oversight can be exploited, for example, to change the ownership of arbitrary files on the host node to the unprivileged user with UID 107 (the same user used by virt-launcher) thus, compromising the CIA (Confidentiality, Integrity and Availability) of data on the host. To successfully exploit this vulnerability, an attacker should be in control of the file system of the virt-launcher pod. This vulnerability is fixed in 1.5.3 and 1.6.1.
KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes
KubeVirt Isolation Detection Flaw Allows Arbitrary File Permission Changes
Security update for kubevirt, virt-api-container, virt-controller-container, virt-exportproxy-container, virt-exportserver-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container, virt-pr-helper-container
EPSS
5 Medium
CVSS3