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Allocation of Resources Without Limits or Throttling Affecting xen package, versions <4.14.1-r0

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.14% (49th percentile)
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NVD
6.2 medium
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SUSE
6.5 medium

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  • Snyk ID SNYK-ALPINE315-XEN-1929262
  • published 1 Jan 2021
  • disclosed 15 Dec 2020
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Introduced: 15 Dec 2020

CVE-2020-29570 Open this link in a new tab
CWE-770 Open this link in a new tab

How to fix?

Upgrade Alpine:3.15 xen to version 4.14.1-r0 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:3.15 relevant fixed versions and status.

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.