CVE-2016-9382

Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.

CVSS v3 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://www.securityfocus.com/bid/94470	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037341	Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-192.html	Patch Vendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775	Patch Third Party Advisory
http://www.securityfocus.com/bid/94470	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037341	Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-192.html	Patch Vendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:xen:xen:4.0.0:::::::*
	cpe:2.3:o:xen:xen:4.0.1:::::::*
	cpe:2.3:o:xen:xen:4.0.2:::::::*
	cpe:2.3:o:xen:xen:4.0.3:::::::*
	cpe:2.3:o:xen:xen:4.0.4:::::::*
	cpe:2.3:o:xen:xen:4.1.0:::::::*
	cpe:2.3:o:xen:xen:4.1.1:::::::*
	cpe:2.3:o:xen:xen:4.1.2:::::::*
	cpe:2.3:o:xen:xen:4.1.3:::::::*
	cpe:2.3:o:xen:xen:4.1.4:::::::*
	cpe:2.3:o:xen:xen:4.1.5:::::::*
	cpe:2.3:o:xen:xen:4.1.6.1:::::::*
	cpe:2.3:o:xen:xen:4.2.0:::::::*
	cpe:2.3:o:xen:xen:4.2.1:::::::*
	cpe:2.3:o:xen:xen:4.2.2:::::::*
	cpe:2.3:o:xen:xen:4.2.3:::::::*
	cpe:2.3:o:xen:xen:4.2.4:::::::*
	cpe:2.3:o:xen:xen:4.2.5:::::::*
	cpe:2.3:o:xen:xen:4.3.0:::::::*
	cpe:2.3:o:xen:xen:4.3.1:::::::*
	cpe:2.3:o:xen:xen:4.3.2:::::::*
	cpe:2.3:o:xen:xen:4.3.3:::::::*
	cpe:2.3:o:xen:xen:4.3.4:::::::*
	cpe:2.3:o:xen:xen:4.4.0:::::::*
	cpe:2.3:o:xen:xen:4.4.1:::::::*
	cpe:2.3:o:xen:xen:4.4.2:::::::*
	cpe:2.3:o:xen:xen:4.4.3:::::::*
	cpe:2.3:o:xen:xen:4.4.4:::::::*
	cpe:2.3:o:xen:xen:4.5.0:::::::*
	cpe:2.3:o:xen:xen:4.5.1:::::::*
	cpe:2.3:o:xen:xen:4.5.2:::::::*
	cpe:2.3:o:xen:xen:4.5.3:::::::*
	cpe:2.3:o:xen:xen:4.5.5:::::::*
	cpe:2.3:o:xen:xen:4.6.0:::::::*
	cpe:2.3:o:xen:xen:4.6.1:::::::*
	cpe:2.3:o:xen:xen:4.6.3:::::::*
	cpe:2.3:o:xen:xen:4.6.4:::::::*
	cpe:2.3:o:xen:xen:4.7.0:::::::*
	cpe:2.3:o:xen:xen:4.7.1:::::::*

Configuration 2 (hide)

OR	cpe:2.3:a:citrix:xenserver:6.0.2:::::::*
	cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
	cpe:2.3:a:citrix:xenserver:6.5:::::::*
	cpe:2.3:a:citrix:xenserver:7.0:::::::*

History

21 Nov 2024, 03:01

Type	Values Removed	Values Added
References	~~() http://www.securityfocus.com/bid/94470 - Third Party Advisory, VDB Entry~~	() http://www.securityfocus.com/bid/94470 - Third Party Advisory, VDB Entry
References	~~() http://www.securitytracker.com/id/1037341 - Third Party Advisory, VDB Entry~~	() http://www.securitytracker.com/id/1037341 - Third Party Advisory, VDB Entry
References	~~() http://xenbits.xen.org/xsa/advisory-192.html - Patch, Vendor Advisory~~	() http://xenbits.xen.org/xsa/advisory-192.html - Patch, Vendor Advisory
References	~~() https://security.gentoo.org/glsa/201612-56 -~~	() https://security.gentoo.org/glsa/201612-56 -
References	~~() https://support.citrix.com/article/CTX218775 - Patch, Third Party Advisory~~	() https://support.citrix.com/article/CTX218775 - Patch, Third Party Advisory

Information

Published : 2017-01-23 21:59

Updated : 2025-04-20 01:37

NVD link : CVE-2016-9382

Mitre link : CVE-2016-9382

CVE.ORG link : CVE-2016-9382

JSON object : View

Products Affected

xen

citrix

xenserver

CWE

CWE-264

Permissions, Privileges, and Access Controls

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"af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://xenbits.xen.org/xsa/advisory-192.html", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.gentoo.org/glsa/201612-56", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://support.citrix.com/article/CTX218775", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-264"}]}], "descriptions": [{"lang": "en", "value": "Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode."}, {"lang": "es", "value": "Xen 4.0.x hasta la versi\u00f3n 4.7.x administra mal los conmutadores de tareas x86 para el modo VM86, lo que permite a usuarios locales del SO invitado x86 HVM de 32-bit obtener privilegios o provocar una denegaci\u00f3n de servicio (ca\u00edda del SO invitado) aprovechando un sistema operativo invitado que utiliza conmutaci\u00f3n de tareas de hardware y permite iniciar una una nueva tarea en modo VM86."}], "lastModified": "2025-04-20T01:37:25.860", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "550223A9-B9F1-440A-8C25-9F0F76AF7301"}, {"criteria": "cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC734D58-96E5-4DD2-8781-F8E0ADB96462"}, {"criteria": "cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "62CEC1BF-1922-410D-BCBA-C58199F574C7"}, {"criteria": "cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": 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7.8 /10