CVE-2017-10921 Information

Description

The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access aka XSA-224 bug 2.

CVSS Vector

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

Reference

http://www.debian.org/security/2017/dsa-3969 http://www.securitytracker.com/id/1038734 https://security.gentoo.org/glsa/201708-03 https://security.gentoo.org/glsa/201710-17 https://xenbits.xen.org/xsa/advisory-224.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

10.0