Vulnerability CVE-2018-19961


Published: 2018-12-07   Modified: 2018-12-08

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.

Type:

CWE-264

(Permissions, Privileges, and Access Controls)

Vendor: Debian
Product: Debian linux 
Version: 9.0;
Vendor: Citrix
Product: Xenserver 
Version:
7.6
7.5
7.1
7.0
Vendor: XEN
Product: XEN 
Version: 4.11.1;

CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.9/10
10/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete

 References:
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
http://www.securityfocus.com/bid/106182
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

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