Описание
A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
Отчет
This Moderate flaw in crun allows a non-root container process to write to and change ownership of a host bind-mounted file. Exploitation requires a malicious container image to replace /dev/null with a symlink while /dev is not mounted within the container, indicating specific preconditions for successful attack.
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 Hardened Images | crun | Affected |
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Дополнительная информация
Статус:
EPSS
5.6 Medium
CVSS3
Связанные уязвимости
(A flaw was found in crun. After pivot_root, reopening /dev/null for st ...)
A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
A flaw was found in crun. After pivot_root, reopening /dev/null for st ...
A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
EPSS
5.6 Medium
CVSS3