CVE-2016-3158

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Summary

CVECVE-2016-3158
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-04-13 16:59:18 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.0 3.8 LOW from [email protected]

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Problem Types: CWE-200 | CWE-284 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary3.8LOWCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
2.0[email protected]Primary1.7AV:L/AC:L/Au:S/C:P/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None

AV:L/AC:L/Au:S/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 22 All All All
Operating System Fedoraproject Fedora 23 All All All
Operating System Oracle Vm Server 3.3 All All All
Operating System Oracle Vm Server 3.4 All All All
Operating System Xen Xen All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Oracle VM Server for x86 Bulletin - July 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Vendor Advisory
[SECURITY] Fedora 23 Update: xen-4.5.3-1.fc23 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Third Party Advisory
Xen Lets Local Users on a Guest System Obtain Register Contents from the Target Guest System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
[SECURITY] Fedora 22 Update: xen-4.5.3-1.fc22 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Third Party Advisory
xenbits.xen.org/xsa/xsa172.patch af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Patch
Debian -- Security Information -- DSA-3554-1 xen af854a3a-2127-422b-91ae-364da2661108 www.debian.org
XSA-172 - Xen Security Advisories af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Vendor Advisory
xenbits.xen.org/xsa/xsa172-4.3.patch af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Patch
Citrix XenServer Multiple Security Updates af854a3a-2127-422b-91ae-364da2661108 support.citrix.com
Xen CVE-2016-3158 Information Disclosure Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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