CVE-2021-4207
Published: 29 April 2022
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
bionic |
Released
(1:2.11+dfsg-1ubuntu7.40)
|
| focal |
Released
(1:4.2-3ubuntu6.23)
|
|
| impish |
Released
(1:6.0+dfsg-2expubuntu1.3)
|
|
| jammy |
Released
(1:6.2+dfsg-2ubuntu6.2)
|
|
| kinetic |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
| lunar |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
| mantic |
Released
(1:6.2+dfsg-2ubuntu8)
|
|
| trusty |
Needs triage
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
|
Patches: upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=9569f5cb5b4bffa9d3ebc8ba7da1e03830a9a895 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.2 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |