Описание
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
An information-exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory.
Отчет
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 | Not affected | ||
| Red Hat Enterprise Linux 5 | xen | Not affected | ||
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | ||
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | qemu-kvm-rhev | Will not fix | ||
| Red Hat OpenStack Platform 12 (Pike) | qemu-kvm-rhev | Not affected | ||
| Red Hat Enterprise Linux 7 | qemu-kvm | Fixed | RHSA-2017:1856 | 01.08.2017 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | qemu-kvm-rhev | Fixed | RHSA-2017:2408 | 01.08.2017 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev | Fixed | RHSA-2017:2408 | 01.08.2017 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev | Fixed | RHSA-2017:2408 | 01.08.2017 |
| Red Hat OpenStack Platform 11.0 (Ocata) | qemu-kvm-rhev | Fixed | RHSA-2017:2408 | 01.08.2017 |
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Дополнительная информация
Статус:
3.4 Low
CVSS3
2.9 Low
CVSS2
Связанные уязвимости
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not ...
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
ELSA-2017-1856: qemu-kvm security, bug fix, and enhancement update (MODERATE)
3.4 Low
CVSS3
2.9 Low
CVSS2