CVE-2017-12154
Public on 2017-09-26
Modified on 2017-10-26
Description
Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization (nVMX) feature enabled (nested=1), is vulnerable to a crash due to disabled external interrupts. As L2 guest could access (r/w) hardware CR8 register of the host(L0). In a nested visualization setup, L2 guest user could use this flaw to potentially crash the host(L0) resulting in DoS.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2017-10-26 | ALAS-2017-914 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv2 | 4.3 | AV:A/AC:H/Au:S/C:N/I:N/A:C |
| Amazon Linux | CVSSv3 | 5.8 | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVD | CVSSv3 | 7.1 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVD | CVSSv2 | 3.6 | AV:L/AC:L/Au:N/C:P/I:P/A:N |