CVE-2017-12154
KVM Linux CR8 Register Information Disclosure Vulnerability
Description
The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.
INFO
Published Date :
Sept. 26, 2017, 5:29 a.m.
Last Modified :
Feb. 12, 2023, 11:27 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.2
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-12154.
| URL | Resource |
|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f | Issue Tracking Patch Third Party Advisory |
| http://www.debian.org/security/2017/dsa-3981 | |
| http://www.securityfocus.com/bid/100856 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2018:0676 | |
| https://access.redhat.com/errata/RHSA-2018:1062 | |
| https://access.redhat.com/errata/RHSA-2019:1946 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1491224 | Issue Tracking Patch Third Party Advisory |
| https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f | Issue Tracking Patch Third Party Advisory |
| https://usn.ubuntu.com/3698-1/ | |
| https://usn.ubuntu.com/3698-2/ | |
| https://www.spinics.net/lists/kvm/msg155414.html | Mailing List Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-12154 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-12154 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 12, 2023
Action Type Old Value New Value Changed 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. The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register. Removed CVSS V2 Red Hat, Inc. (AV:A/AC:H/Au:S/C:N/I:N/A:C) Removed CVSS V3 Red Hat, Inc. AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H Removed Reference https://access.redhat.com/security/cve/CVE-2017-12154 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register. 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. Added CVSS V2 Red Hat, Inc. (AV:A/AC:H/Au:S/C:N/I:N/A:C) Added CVSS V3 Red Hat, Inc. AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H Added Reference https://access.redhat.com/security/cve/CVE-2017-12154 [No Types Assigned] -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-284 NVD-CWE-noinfo -
CVE Modified by [email protected]
Jul. 30, 2019
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2019:1946 [No Types Assigned] -
CVE Modified by [email protected]
Jul. 13, 2018
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/3698-1/ [No Types Assigned] -
CVE Modified by [email protected]
Jul. 04, 2018
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/3698-2/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 12, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:1062 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2018:0676 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 06, 2017
Action Type Old Value New Value Added Reference http://www.debian.org/security/2017/dsa-3981 [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 28, 2017
Action Type Old Value New Value Added CVSS V2 (AV:L/AC:L/Au:N/C:P/I:P/A:N) Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f No Types Assigned https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1491224 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1491224 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://www.spinics.net/lists/kvm/msg155414.html No Types Assigned https://www.spinics.net/lists/kvm/msg155414.html Mailing List, Patch, Third Party Advisory Changed Reference Type http://www.securityfocus.com/bid/100856 No Types Assigned http://www.securityfocus.com/bid/100856 Third Party Advisory, VDB Entry Changed Reference Type http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f No Types Assigned http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f Issue Tracking, Patch, Third Party Advisory Added CWE CWE-284 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:4.13.3:*:*:*:*:*:*:* (and previous) -
CVE Modified by [email protected]
Sep. 27, 2017
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/100856 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-12154 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-12154
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.23061
percentile