Out-of-Bounds Affecting xen package, versions [,4.12.4)[4.13.0-rc0,4.13.2)[4.14.0-rc0,4.14.1)


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-UNMANAGED-XEN-2383772
  • published26 Jan 2022
  • disclosed22 Oct 2020
  • creditUnknown

Introduced: 22 Oct 2020

CVE-2020-27674  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade xen to version 4.12.4, 4.13.2, 4.14.1 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-Bounds. An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.

References

CVSS Base Scores

version 3.1