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Access Restriction Bypass Affecting xen package, versions <4.7.1-r1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.06% (26th percentile)
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NVD
7.8 high

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  • Snyk ID SNYK-ALPINE314-XEN-1308588
  • published 21 Jul 2020
  • disclosed 23 Jan 2017
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Introduced: 23 Jan 2017

CVE-2016-9382 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade Alpine:3.14 xen to version 4.7.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.14 relevant fixed versions and status.

Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.