Allocation of Resources Without Limits or Throttling Affecting xen package, versions <4.14.0+88-g1d1d1f5391-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (57th percentile)

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  • Snyk IDSNYK-DEBIAN11-XEN-1051773
  • published16 Dec 2020
  • disclosed15 Dec 2020

Introduced: 15 Dec 2020

CVE-2020-29570  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:11 xen to version 4.14.0+88-g1d1d1f5391-1 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 Debian. See How to fix? for Debian:11 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.

CVSS Scores

version 3.1