CVE-2016-3158
1.7 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:S/C:P/I:N/A:N
3.8 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
4.3 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.6%
The xrstor function in arch/x86/xstate.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.
Affected configurations
References
lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html
lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html
support.citrix.com/article/CTX209443
www.debian.org/security/2016/dsa-3554
www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
www.securityfocus.com/bid/85714
www.securitytracker.com/id/1035435
xenbits.xen.org/xsa/advisory-172.html
xenbits.xen.org/xsa/xsa172-4.3.patch
xenbits.xen.org/xsa/xsa172.patch
Related
1.7 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:S/C:P/I:N/A:N
3.8 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
4.3 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
41.6%