Missing Authorization Affecting kernel-tools package, versions <0:3.10.0-1160.41.1.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELTOOLS-7972826
  • published14 Sept 2024
  • disclosed8 Oct 2020

Introduced: 8 Oct 2020

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

How to fix?

Upgrade RHEL:7 kernel-tools to version 0:3.10.0-1160.41.1.el7 or higher.
This issue was patched in RHSA-2021:3327.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL. See How to fix? for RHEL:7 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