Vulnerability CVE-2018-19962
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 small IOMMU mappings are unsafely combined into larger ones.

Type:

CWE-200

 (Information Exposure)

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
Affected software
XEN -> XEN 
Debian -> Debian linux 
Citrix -> Xenserver 

 References:
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
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