Описание
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
It was found that the Linux kernel's KVM subsystem did not handle the VM exits gracefully for the invept (Invalidate Translations Derived from EPT) instructions. On hosts with an Intel processor and invept VM exit support, an unprivileged guest user could use these instructions to crash the guest.
Отчет
This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6 and 7. Future updates may address this issue in the respective Red Hat Enterprise Linux releases. This issue does affect the kvm packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm | Affected | ||
| Red Hat Enterprise Linux Extended Update Support 7.0 | kernel | Affected | ||
| Red Hat Enterprise Linux 6 | kernel | Fixed | RHSA-2014:1843 | 11.11.2014 |
| Red Hat Enterprise Linux 6.5 Extended Update Support | kernel | Fixed | RHSA-2015:0284 | 03.03.2015 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2014:1724 | 28.10.2014 |
| RHEV 3.X Hypervisor and Agents for RHEL-6 | rhev-hypervisor6 | Fixed | RHSA-2015:0126 | 04.02.2015 |
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Дополнительная информация
Статус:
EPSS
4.7 Medium
CVSS2
Связанные уязвимости
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application. A local unprivileged guest user could use this flaw to crash the guest.
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.1 ...
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application.
ELSA-2014-1843: kernel security and bug fix update (IMPORTANT)
EPSS
4.7 Medium
CVSS2