Описание
Incus is a system container and virtual machine manager. Prior to version 6.23.0, instance template files can be used to cause arbitrary read or writes as root on the host server. Incus allows for pongo2 templates within instances which can be used at various times in the instance lifecycle to template files inside of the instance. This particular implementation of pongo2 within Incus allowed for file read/write but with the expectation that the pongo2 chroot feature would isolate all such access to the instance's filesystem. This was allowed such that a template could theoretically read a file and then generate a new version of said file. Unfortunately the chroot isolation mechanism is entirely skipped by pongo2 leading to easy access to the entire system's filesystem with root privileges. Version 6.23.0 patches the issue.
A flaw was found in Incus, a system container and virtual machine manager. An attacker with control over instance template files can exploit a vulnerability in the pongo2 templating engine. This flaw allows for arbitrary read or write operations as the root user on the host server by bypassing the intended chroot isolation mechanism. This can lead to unauthorized access and modification of critical system files.
Отчет
This Important flaw in Incus, a system container and virtual machine manager, allows an attacker with control over instance template files to bypass chroot isolation. This enables arbitrary file read or write operations as the root user on the host server. This vulnerability affects Incus, which is available as a community project.
Дополнительная информация
Статус:
9.1 Critical
CVSS3
Связанные уязвимости
Incus is a system container and virtual machine manager. Prior to version 6.23.0, instance template files can be used to cause arbitrary read or writes as root on the host server. Incus allows for pongo2 templates within instances which can be used at various times in the instance lifecycle to template files inside of the instance. This particular implementation of pongo2 within Incus allowed for file read/write but with the expectation that the pongo2 chroot feature would isolate all such access to the instance's filesystem. This was allowed such that a template could theoretically read a file and then generate a new version of said file. Unfortunately the chroot isolation mechanism is entirely skipped by pongo2 leading to easy access to the entire system's filesystem with root privileges. Version 6.23.0 patches the issue.
Incus is a system container and virtual machine manager. Prior to version 6.23.0, instance template files can be used to cause arbitrary read or writes as root on the host server. Incus allows for pongo2 templates within instances which can be used at various times in the instance lifecycle to template files inside of the instance. This particular implementation of pongo2 within Incus allowed for file read/write but with the expectation that the pongo2 chroot feature would isolate all such access to the instance's filesystem. This was allowed such that a template could theoretically read a file and then generate a new version of said file. Unfortunately the chroot isolation mechanism is entirely skipped by pongo2 leading to easy access to the entire system's filesystem with root privileges. Version 6.23.0 patches the issue.
Incus is a system container and virtual machine manager. Prior to vers ...
Incus vulnerable to arbitrary file read and write through pongo templates
Уязвимость системы управления контейнерами и менеджера виртуальных машин Incus, связанная с непринятием мер по нейтрализации специальных элементов в механизме создания шаблонов, позволяющая нарушителю выполнить произвольный код
9.1 Critical
CVSS3