CVE-2021-3429

Publication date 19 April 2023

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

Description

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.

Status

Package Ubuntu Release Status
cloud-init 20.10 groovy
Fixed 21.1-19-gbad84ad4-0ubuntu1~20.10.1
20.04 LTS focal
Fixed 21.1-19-gbad84ad4-0ubuntu1~20.04.1
18.04 LTS bionic
Fixed 21.1-19-gbad84ad4-0ubuntu1~18.04.1
16.04 LTS xenial
Fixed 21.1-19-gbad84ad4-0ubuntu1~16.04.1
14.04 LTS trusty Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
cloud-init

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Other references