Описание
It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
It was discovered that libvirtd would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
Отчет
- This vulnerability requires access to the libvirt socket, normally in /var/run/libvirt/libvirt_sock_ro. Typically in hypervisor environments, local user accounts are not supported so no untrusted users should be able to access this socket.
- Red Hat Gluster Storage 3 is not affected by this vulnerability as libvirtd daemon is not shipped in Gluster.
Меры по смягчению последствий
The Unix permissions of libvirt's read-only socket can be made more restrictive than the default (0777) by editing /etc/libvirt/libvirtd.conf. The settings unix_sock_group = libvirt and unix_sock_ro_perms = 0770 will restrict access to only members of libvirt, who already have management access to virtual machines.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | libvirt | Not affected | ||
| Red Hat Enterprise Linux 6 | libvirt | Not affected | ||
| Red Hat Storage 3 | libvirt | Not affected | ||
| Red Hat Enterprise Linux 7 | libvirt | Fixed | RHSA-2019:1579 | 20.06.2019 |
| Red Hat Enterprise Linux 8 | virt | Fixed | RHSA-2019:1580 | 20.06.2019 |
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt | Fixed | RHSA-2019:1762 | 11.07.2019 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | redhat-release-virtualization-host | Fixed | RHSA-2019:1699 | 08.07.2019 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | redhat-virtualization-host | Fixed | RHSA-2019:1699 | 08.07.2019 |
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Дополнительная информация
Статус:
EPSS
7.8 High
CVSS3
Связанные уязвимости
It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x. ...
It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.
Уязвимость функции virDomainManagedSaveDefineXML библиотеки libvirtd, позволяющая нарушителю изменять произвольные файлы
EPSS
7.8 High
CVSS3