CVE-2024-8612
Publication date 20 September 2024
Last updated 16 December 2024
Ubuntu priority
A flaw was found in QEMU, in the virtio-scsi, virtio-blk, and virtio-crypto devices. The size for virtqueue_push as set in virtio_scsi_complete_req / virtio_blk_req_complete / virito_crypto_req_complete could be larger than the true size of the data which has been sent to guest. Once virtqueue_push() finally calls dma_memory_unmap to ummap the in_iov, it may call the address_space_write function to write back the data. Some uninitialized data may exist in the bounce.buffer, leading to an information leak.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| qemu | 24.10 oracular |
Vulnerable, fix deferred
|
| 24.04 LTS noble |
Vulnerable, fix deferred
|
|
| 22.04 LTS jammy |
Vulnerable, fix deferred
|
|
| 20.04 LTS focal |
Vulnerable, fix deferred
|
|
| 18.04 LTS bionic |
Vulnerable, fix deferred
|
|
| 16.04 LTS xenial |
Vulnerable, fix deferred
|
|
| 14.04 LTS trusty | Ignored end of ESM support, was deferred [2024-12-16] |
Notes
mdeslaur
as of 2024-12-16, the commit below only addresses the symptoms but not the root cause, the proper fix is still being discussed: https://lore.kernel.org/qemu-devel/[email protected]/
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
3.8 · Low
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |