CVE-2023-42445 : What You Need to Know

This article provides detailed information about CVE-2023-42445, a vulnerability that allows possible local file exfiltration by XML External entity injection.

Understanding CVE-2023-42445

This CVE involves a vulnerability in Gradle, a build tool for build automation and multi-language development, where XML files parsing can lead to the exfiltration of local text files to a remote server.

What is CVE-2023-42445?

Gradle, when parsing XML files, leaves XML external entity resolution enabled, making it vulnerable to XML External Entity (XXE) attacks. This vulnerability allows an attacker to exfiltrate local text files remotely.

The Impact of CVE-2023-42445

The impact of this vulnerability is classified as MEDIUM severity with a CVSS base score of 6.8. It requires user interaction and can lead to high confidentiality and availability impact, affecting systems running affected versions of Gradle.

Technical Details of CVE-2023-42445

This section covers specific technical details of the CVE.

Vulnerability Description

In Gradle versions prior to 7.6.3 and 8.4, the vulnerability arises due to the improper restriction of XML External Entity Reference, enabling attackers to exploit the parsing of XML files for exfiltration purposes.

Affected Systems and Versions

The vulnerability affects Gradle versions < 8.4 and < 7.6.3. Systems running these versions are at risk of exploitation through XML External entity injection.

Exploitation Mechanism

The exploitation involves manipulating XML files to include external entities that, when parsed by Gradle, trigger the exfiltration of local text files to a remote server.

Mitigation and Prevention

Here are the recommended steps to mitigate and prevent the exploitation of CVE-2023-42445.

Immediate Steps to Take

Update Gradle to version 7.6.3 or 8.4 to disable XML external entity resolution and prevent exfiltration attacks.
Monitor file access and network traffic for any suspicious activities.

Long-Term Security Practices

Implement secure coding practices to avoid vulnerabilities related to XML parsing in software development.
Regularly update software dependencies to mitigate known security issues.

Patching and Updates

Ensure timely application of security patches released by Gradle to address vulnerabilities and enhance the security posture of software systems.