CVE-2016-4020
Published: 14 April 2016
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
| trusty |
Released
(2.0.0+dfsg-2ubuntu1.24)
|
|
| upstream |
Needed
|
|
| wily |
Released
(1:2.3+dfsg-5ubuntu9.4)
|
|
| xenial |
Released
(1:2.5+dfsg-5ubuntu10.1)
|
|
|
Patches: other: https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html |
||
|
qemu-kvm Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(code not present)
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| wily |
Does not exist
|
|
| xenial |
Does not exist
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |