CVE-2016-4480

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

CVSS v3 8.4 HIGH
CVSS v2.0 7.2 HIGH

8.4^/10

CVSS v3 : HIGH

V3 Legend

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

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://www.debian.org/security/2016/dsa-3633
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	Vendor Advisory
http://www.securityfocus.com/bid/90710
http://www.securitytracker.com/id/1035901
http://xenbits.xen.org/xsa/advisory-176.html	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:oracle:vm_server:3.2:::::::*
	cpe:2.3:o:oracle:vm_server:3.3:::::::*
	cpe:2.3:o:oracle:vm_server:3.4:::::::*

Configuration 2 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2016-05-18 14:59

Updated : 2016-12-01 03:10

NVD link : CVE-2016-4480

Mitre link : CVE-2016-4480

CVE.ORG link : CVE-2016-4480

JSON object : View

Products Affected

xen

oracle

vm_server

CWE

CWE-264

Permissions, Privileges, and Access Controls

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8.4 /10