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CVE-2021-3429

5.5 · MEDIUM

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.

Published Apr 19, 2023CWE-532EPSS 0.22%

Overview

CVE-2021-3429 is a medium-severity vulnerability. It was published on April 19, 2023 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668GitHubgithub.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3429?

CVE-2021-3429 is a medium-severity vulnerability. It was published on April 19, 2023 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-3429?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-3429?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-3429?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3429 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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