CVE-2018-19961 Information

Description

An issue was discovered in Xen through 4.11.x on AMD x86 platforms possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html http://www.securityfocus.com/bid/106182 https://lists.debian.org/debian-lts-announce/2019/10/msg00008.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/ https://support.citrix.com/article/CTX239432 https://www.debian.org/security/2019/dsa-4369 https://xenbits.xen.org/xsa/advisory-275.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

7.8