CVE-2019-20175
Published: 31 December 2019
** 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."
Notes
Author | Note |
---|---|
mdeslaur | issue was disputed by the qemu security team, marking as not-affected |
Priority
Status
Package | Release | Status |
---|---|---|
qemu Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
disco |
Ignored
(end of life)
|
|
eoan |
Not vulnerable
|
|
trusty |
Not vulnerable
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
|
|
qemu-kvm Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20175
- 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
- https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html
- NVD
- Launchpad
- Debian