Missing Authorization Affecting kernel-debuginfo package, versions <0:4.14.209-117.337.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (20th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELDEBUGINFO-1724845
  • published27 Sept 2021
  • disclosed15 Dec 2020

Introduced: 15 Dec 2020

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

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-debuginfo to version 0:4.14.209-117.337.amzn1 or higher.
This issue was patched in ALAS-2021-1461.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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 Scores

version 3.1