CVE-2016-1570

Publication date 22 January 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	15.10 wily	Fixed 4.5.1-0ubuntu1.3
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Fixed 4.4.2-0ubuntu0.14.04.5
	12.04 LTS precise	Fixed 4.1.6.1-0ubuntu0.12.04.10

Notes

mdeslaur

hypervisor packages are in universe. For issues in the hypervisor, add appropriate tags to each section, ex: Tags_xen: universe-binary

tyhicks

Feature disabled by default “Xen versions 3.4.0, 3.4.1, and from 4.1 onwards are affected.”

Severity score breakdown

Parameter	Value
Base score	8.5 · High
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H