National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-12154 Detail

Current 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.

Source:  MITRE      Last Modified:  09/26/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-12154
Original release date:
09/26/2017
Last revised:
11/05/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
7.1 High
Vector:
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N (legend)
Impact Score:
5.2
Exploitability Score:
1.8
CVSS Version 3 Metrics:
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
None
CVSS Severity (version 2.0):
CVSS v2 Base Score:
3.6 LOW
Vector:
(AV:L/AC:L/Au:N/C:P/I:P/A:N) (legend)
Impact Subscore:
4.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f Issue Tracking; Patch; Third Party Advisory External Source CONFIRM http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
http://www.debian.org/security/2017/dsa-3981 External Source DEBIAN DSA-3981
http://www.securityfocus.com/bid/100856 Third Party Advisory; VDB Entry External Source BID 100856
https://bugzilla.redhat.com/show_bug.cgi?id=1491224 Issue Tracking; Patch; Third Party Advisory External Source CONFIRM https://bugzilla.redhat.com/show_bug.cgi?id=1491224
https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f Issue Tracking; Patch; Third Party Advisory External Source CONFIRM https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f
https://www.spinics.net/lists/kvm/msg155414.html Mailing List; Patch; Third Party Advisory External Source CONFIRM https://www.spinics.net/lists/kvm/msg155414.html

Technical Details

Vulnerability Type (View All)

  • Improper Access Control (CWE-284)

Change History 3 change records found - show changes