NULL Pointer Dereference Affecting busybox-petitboot package, versions <1:1.34.1-1.13.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-AMZN201803-BUSYBOXPETITBOOT-2348073
  • published20 Jan 2022
  • disclosed15 Nov 2021

Introduced: 15 Nov 2021

CVE-2021-42376  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 busybox-petitboot to version 1:1.34.1-1.13.amzn1 or higher.
This issue was patched in ALAS-2022-1558.

NVD Description

Note: Versions mentioned in the description apply only to the upstream busybox-petitboot package and not the busybox-petitboot package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.

CVSS Base Scores

version 3.1