CVE-2018-19962: Infoleak

Published Dec 8, 2018
·
Updated

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.

Affected Software

7 affected componentsFixes available
debian/xen
4.11.4+107-gef32c7afa2-14.14.6-14.14.5+94-ge49571868d-14.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-1
XEN Xen<=4.11.1
Debian Debian Linux=9.0
Citrix XenServer=7.0
Citrix XenServer=7.1-cu1
Citrix XenServer=7.5
Citrix XenServer=7.6

Event History

Dec 8, 2018
CVE Published
via MITRE·04:00 AM
Data Sourced
via MITRE·04:00 AM
Description
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Frequently Asked Questions

1

What is CVE-2018-19962?

CVE-2018-19962 is a vulnerability in Xen that allows guest OS users to gain host OS privileges.

2

What is the severity of CVE-2018-19962?

The severity of CVE-2018-19962 is high with a CVSS score of 7.8.

3

Which platforms are affected by CVE-2018-19962?

AMD x86 platforms running Xen through version 4.11.x are affected by CVE-2018-19962.

4

How can guest OS users exploit CVE-2018-19962?

Guest OS users can exploit CVE-2018-19962 by combining small IOMMU mappings into larger ones.

5

How can I fix CVE-2018-19962?

To fix CVE-2018-19962, update Xen to version 4.11.4+107-gef32c7afa2-1 or a later version.

Contact

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