CVE-2023-30470 : What You Need to Know

This article provides detailed information about CVE-2023-30470, a use-after-free vulnerability affecting Hermes by Facebook.

Understanding CVE-2023-30470

This section delves into the nature of the vulnerability and its impact.

What is CVE-2023-30470?

CVE-2023-30470 is a use-after-free vulnerability related to unsound inference in bytecode generation when optimizations are enabled for Hermes. It could allow an attacker to achieve remote code execution, but only exploitable when Hermes executes untrusted JavaScript.

The Impact of CVE-2023-30470

The vulnerability could potentially lead to remote code execution by malicious actors exploiting the use-after-free issue in Hermes.

Technical Details of CVE-2023-30470

In this section, we explore the specifics of the vulnerability, affected systems, and exploitation mechanism.

Vulnerability Description

A use-after-free bug in Hermes could be leveraged for remote code execution by attackers under specific conditions.

Affected Systems and Versions

Hermes version 0 (git) prior to commit da8990f737ebb9d9810633502f65ed462b819c09 is affected by this vulnerability.

Exploitation Mechanism

The vulnerability arises in bytecode generation due to unsound inference when certain optimizations are enabled in Hermes.

Mitigation and Prevention

This section outlines steps to mitigate the CVE-2023-30470 vulnerability in Hermes.

Immediate Steps to Take

Developers should update Hermes to a version beyond commit da8990f737ebb9d9810633502f65ed462b819c09 to mitigate the use-after-free vulnerability.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and monitor for any suspicious activities to enhance overall system security.

Patching and Updates

Stay informed about security updates from Hermes and promptly apply patches to address known vulnerabilities.