CVE-2016-1570 Information

Description

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0 3.4.1 and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information cause a denial of service gain privileges or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.

CVSS Vector

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

Reference

http://www.debian.org/security/2016/dsa-3519 http://www.securitytracker.com/id/1034744 http://xenbits.xen.org/xsa/advisory-167.html

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.5