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CVE-2016-3159

CVE information

Published

6 years ago

Last Modified

3 years ago

CVSSv2.0 Severity

Low

CVSSv3.1 Severity

Low

Impact Analysis

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..

CVSSv2.0 Score

Severity
Low
Base Score
1.7/10
Exploit Score
3.1/10
Access Vector
Local
Access Complexity
Low
Authentication Required
Single
Impact Score
2.9/10
Confidentiality Impact
Partial
Availability Impact
None
Integrity Impact
None

CVSSv3.1 Score

Severity
Low
Base Score
3.8/10
Exploit Score
2/10
Access Vector
Local
Access Complexity
Low
Privileges Required
Low
Impact Score
1.4/10
Confidentiality Impact
Low
Availability Impact
None
Integrity Impact
None
Scope
Changed
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
  Yes
4.3.0 -
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
  Yes
4.4.0 -
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
  Yes
4.5.0 -
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
  Yes
4.6.0 -
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  Yes
- -