Описание
A flaw was found in libvirt. A local attacker, specifically a process running as the confined swtpm user, could exploit a symlink-following vulnerability in the virFileChownFiles() function. By planting a symbolic link within the swtpm state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the swtpm user. This allows for privilege escalation from the swtpm sandbox to root-level file ownership control.
Меры по смягчению последствий
If virtual Trusted Platform Module (vTPM) functionality is not required, remove the device definition from the domain XML configuration to prevent the vulnerable code path from being reached. To check if a domain uses vTPM:
To remove it, edit the domain XML and delete the block. This prevents libvirt from spawning swtpm processes and from calling virFileChownFiles() on the swtpm state directory during domain startup. Domains that require vTPM for guest OS functionality cannot use this mitigation and should prioritize applying the upstream fix.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | libvirt | Affected | ||
| Red Hat Enterprise Linux 6 | libvirt | Not affected | ||
| Red Hat Enterprise Linux 7 | libvirt | Affected | ||
| Red Hat Enterprise Linux 8 | virt:rhel/libvirt | Affected | ||
| Red Hat Enterprise Linux 9 | libvirt | Affected | ||
| Red Hat Enterprise Linux for NVIDIA 26 | libvirt | Out of support scope |
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Дополнительная информация
Статус:
EPSS
7.8 High
CVSS3
Связанные уязвимости
A flaw was found in libvirt. A local attacker, specifically a process running as the confined `swtpm` user, could exploit a symlink-following vulnerability in the `virFileChownFiles()` function. By planting a symbolic link within the `swtpm` state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the `swtpm` user. This allows for privilege escalation from the `swtpm` sandbox to root-level file ownership control.
A flaw was found in libvirt. A local attacker, specifically a process ...
A flaw was found in libvirt. A local attacker, specifically a process running as the confined `swtpm` user, could exploit a symlink-following vulnerability in the `virFileChownFiles()` function. By planting a symbolic link within the `swtpm` state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the `swtpm` user. This allows for privilege escalation from the `swtpm` sandbox to root-level file ownership control.
EPSS
7.8 High
CVSS3