Missing Authorization Affecting linux-4.19 package, versions <4.19.160-2~deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.48% (40th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1048662
  • published24 Nov 2020
  • disclosed15 Dec 2020

Introduced: 24 Nov 2020

CVE-2020-27777  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.160-2~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.19 package and not the linux-4.19 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.

CVSS Base Scores

version 3.1