CVE-2021-32751 Explained : Impact and Mitigation

This article discusses the CVE-2021-32751 vulnerability in Gradle, affecting versions prior to 7.2.

Understanding CVE-2021-32751

This CVE details an arbitrary code execution vulnerability in Gradle due to specially crafted environment variables.

What is CVE-2021-32751?

Gradle versions before 7.2 are vulnerable to arbitrary code execution via start scripts generated by the application plugin and 'gradlew' script.

The Impact of CVE-2021-32751

The vulnerability poses a high risk with a CVSS base score of 7.5 and impacts confidentiality, integrity, and availability.

Technical Details of CVE-2021-32751

This section covers the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows attackers to execute arbitrary code by manipulating environment variables seen by vulnerable scripts.

Affected Systems and Versions

Gradle versions prior to 7.2 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by changing environment variables for the user running the script.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-32751.

Immediate Steps to Take

Ensure untrusted users cannot alter environment variables for the 'gradlew' script and start scripts.

Long-Term Security Practices

Consider upgrading to Gradle 7.2 or generating new 'gradlew' scripts with the patched version.

Patching and Updates

Apply the patch provided in Gradle 7.2 to address the vulnerability and consider avoiding start scripts by running applications directly with Java command.