Описание
An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| qemu | fixed | 1:5.0-1 | package |
Примечания
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html
Marked unimportant, as negligible security impact (a privileged guest
can trigger similar issues without triggering the specific assert) and
is disputed by QEMU security team.
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/ed78352a59ea7acf7520d4d47a96b9911bae7fc3 (v5.0.0-rc0)
EPSS
Связанные уязвимости
An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert.
An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert.
** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert."
Уязвимость функции ide_dma_cb() эмуляции аппаратного обеспечения различных платформ QEMU, связанная с недостаточной проверкой необычных или исключительных состояний, позволяющая нарушителю вызвать отказ в обслуживании
EPSS