CVE-2017-14319 Information

Description

A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly neither the presence of the mapping nor page writability were taken into account.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/100819 http://www.securitytracker.com/id/1039351 http://xenbits.xen.org/xsa/advisory-234.html https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html https://support.citrix.com/article/CTX227185 https://www.debian.org/security/2017/dsa-4050

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8