Information Exposure Through Log Files Affecting cloud-init package, versions <0:19.3-43.amzn2


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-AMZN2-CLOUDINIT-1698275
  • published27 Sept 2021
  • disclosed19 Apr 2023

Introduced: 27 Sep 2021

CVE-2021-3429  (opens in a new tab)
CWE-532  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 cloud-init to version 0:19.3-43.amzn2 or higher.
This issue was patched in ALAS2-2021-1620.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cloud-init package and not the cloud-init package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

When instructing cloud-init to set a random password for a new user account, versions before 21.2 would write that password to the world-readable log file /var/log/cloud-init-output.log. This could allow a local user to log in as another user.

CVSS Scores

version 3.1