Out-of-bounds Write Affecting kernel-tools package, versions <0:4.14.294-150.533.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELTOOLS-3042251
  • published11 Oct 2022
  • disclosed18 Jul 2022

Introduced: 18 Jul 2022

CVE-2021-33655  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-tools to version 0:4.14.294-150.533.amzn1 or higher.
This issue was patched in ALAS-2022-1636.

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 Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.

CVSS Scores

version 3.1