Описание
hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.
A buffer overflow flaw was found in the way the Bochs display driver of QEMU handled the PCIe extended configuration space when the device is connected to a PCIe bus. Accessing the PCIe extended config space could overflow the conventional PCI config space buffer due to limited memory allocation. As the PCIe config space is guest writeable, this flaw allows a local attacker to gain access and potentially execute arbitrary code on the host with the privileges of the QEMU process.
Отчет
This flaw does not affect the module streamvirt:8.1/qemu-kvm as shipped with RHEL Advanced Virtualization, as it already includes the patch.
Several other packages are unaffected because they do not include PCIe support:
kvmandxenas shipped with Red Hat Enterprise Linux 5qemu-kvmas shipped with Red Hat Enterprise Linux 6 and 7qemu-kvm-rhevas shipped with Red Hat Enterprise Linux 7virt:rhel/qemu-kvmas shipped with Red Hat Enterprise Linux 8qemu-kvm-rhevas shipped with Red Hat OpenStack Platform 10 and 13
Меры по смягчению последствий
Use -device bochs-display as conventional PCI device only.
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 7 | qemu-kvm | Not affected | ||
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | ||
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected | ||
| Red Hat Enterprise Linux 8 | virt:rhel/qemu-kvm | Not affected | ||
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:8.1/qemu-kvm | Not affected | ||
| Red Hat OpenStack Platform 10 (Newton) | qemu-kvm-rhev | Not affected | ||
| Red Hat OpenStack Platform 13 (Queens) | qemu-kvm-rhev | Not affected |
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Дополнительная информация
Статус:
EPSS
5.8 Medium
CVSS3
Связанные уязвимости
hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.
hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.
hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient ...
hw/display/bochs-display.c in QEMU 4.0.0 does not ensure a sufficient PCI config space allocation, leading to a buffer overflow involving the PCIe extended config space.
EPSS
5.8 Medium
CVSS3