CVE-2021-38305 : What You Need to Know

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

Understanding CVE-2021-38305

This CVE pertains to a vulnerability in 23andMe Yamale before version 3.0.8 that enables attackers to run malicious code remotely.

What is CVE-2021-38305?

CVE-2021-38305 refers to a security issue in the Yamale tool by 23andMe. Due to improper input validation, an attacker can execute arbitrary code by exploiting the way the schema parser evaluates expressions.

The Impact of CVE-2021-38305

The vulnerability allows attackers to execute system commands by creating a specifically crafted string within the schema rules, leading to arbitrary code execution on systems running the affected version of Yamale.

Technical Details of CVE-2021-38305

This section delves into the specifics of the CVE.

Vulnerability Description

The flaw arises from the use of Python's eval function during schema processing. By manipulating input data, malicious users can bypass the restrictions and execute unauthorized commands.

Affected Systems and Versions

23andMe Yamale versions prior to 3.0.8 are vulnerable to this exploit. Users are advised to update to the latest version to mitigate the risk.

Exploitation Mechanism

Attackers can leverage a well-crafted string within the schema rules to execute system commands, allowing them to run arbitrary code on the targeted system.

Mitigation and Prevention

Understanding how to address and prevent CVE-2021-38305 is crucial.

Immediate Steps to Take

Users should update 23andMe Yamale to version 3.0.8 or later to eliminate the vulnerability and prevent unauthorized code execution.

Long-Term Security Practices

Implementing secure coding practices, input sanitization, and regular security audits can help mitigate similar vulnerabilities in the future.

Patching and Updates

Regularly installing software updates and security patches is essential to safeguard systems against known vulnerabilities.