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CVE-2021-38305

7.8 · HIGH

23andMe Yamale before 3.0.8 allows remote attackers to execute arbitrary code via a crafted schema file.

Published Aug 9, 2021CWE-434EPSS 2.49%

Overview

CVE-2021-38305 is a high-severity vulnerability. It was published on August 9, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

23andMe Yamale before 3.0.8 allows remote attackers to execute arbitrary code via a crafted schema file. The schema parser uses eval as part of its processing, and tries to protect from malicious expressions by limiting the builtins that are passed to the eval. When processing the schema, each line is run through Python's eval function to make the validator available. A well-constructed string within the schema rules can execute system commands; thus, by exploiting the vulnerability, an attacker can run arbitrary code on the image that invokes Yamale.

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/23andMe/Yamale/pull/165GitHubgithub.com/23andMe/Yamale/releases/tag/3.0.8GitHubgithub.com/23andMe/Yamale/pull/165GitHubgithub.com/23andMe/Yamale/releases/tag/3.0.8

How CyberStrike helps

Frequently asked questions

What is CVE-2021-38305?

CVE-2021-38305 is a high-severity vulnerability. It was published on August 9, 2021 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-38305?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-38305?

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-2021-38305?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-38305 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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