CVE-2016-3159

Severity CVSS v4.0:

Pending analysis

Type:

CWE-200 Information Leak / Disclosure

Publication date:

13/04/2016

Last modified:

12/04/2025

Description

The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

Impact

Vector 3.x

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.80 LOW
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x

3.80

Severity 3.x

LOW

Vector 2.0

AV:L/AC:L/Au:S/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 1.70 LOW
Vector: AV:L/AC:L/Au:S/C:P/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

1.70

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:oracle:vm_server:3.3:::::::*
cpe:2.3:o:oracle:vm_server:3.4:::::::*
cpe:2.3:o:xen:xen::::::::	4.3.0 (including)	4.3.4 (including)
cpe:2.3:o:xen:xen::::::::	4.4.0 (including)	4.4.4 (including)
cpe:2.3:o:xen:xen::::::::	4.5.0 (including)	4.5.3 (including)
cpe:2.3:o:xen:xen::::::::	4.6.0 (including)	4.6.1 (including)
cpe:2.3:o:fedoraproject:fedora:22:::::::*
cpe:2.3:o:fedoraproject:fedora:23:::::::*
cpe:2.3:o:debian:debian_linux:8.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2016-3159

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools