CVE-2016-3159

CVE Details

Release Date:	2016-03-24
Impact:	Moderate	What is this?

Description

The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does notproperly 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.

See more information about CVE-2016-3159 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	3.8
Vector String:	AV:A/AC:M/Au:S/C:P/I:P/A:N
Version:	2.0
Attack Vector:	Adjacent Network
Attack Complexity:	Medium
Authentication:	Single
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle VM version 3.3 (xen)	OVMSA-2016-0089	2016-07-27
Oracle VM version 3.4 (xen)	OVMSA-2016-0088	2016-07-27