CVE-2022-35289 : Exploit Details and Defense Strategies

A write-what-where condition in Hermes caused by an integer overflow allows attackers to potentially execute arbitrary code via crafted JavaScript. Most React Native applications are not affected.

Understanding CVE-2022-35289

This section provides insights into the CVE-2022-35289 vulnerability.

What is CVE-2022-35289?

CVE-2022-35289 is a write-what-where condition in Hermes caused by an integer overflow, enabling attackers to execute arbitrary code via crafted JavaScript. It is exploitable if the application allows evaluation of untrusted JavaScript.

The Impact of CVE-2022-35289

The impact of this vulnerability is the potential execution of arbitrary code, leading to unauthorized access and control of systems.

Technical Details of CVE-2022-35289

In this section, we delve into the technical aspects of CVE-2022-35289.

Vulnerability Description

The vulnerability is due to an integer overflow in Hermes, which can be exploited by attackers to run malicious code by manipulating JavaScript.

Affected Systems and Versions

Vendor: Facebook Product: Hermes Versions Affected: All versions prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374

Exploitation Mechanism

The vulnerability arises from a write-what-where condition caused by an integer overflow, which can be leveraged to execute arbitrary code through specially crafted JavaScript.

Mitigation and Prevention

This section outlines measures to mitigate and prevent exploitation of CVE-2022-35289.

Immediate Steps to Take

Update Hermes to commit 5b6255ae049fa4641791e47fad994e8e8c4da374 or later.
Restrict evaluation of untrusted JavaScript in applications.

Long-Term Security Practices

Regularly update software components to the latest secure versions.
Implement access controls and input validation mechanisms to prevent code execution vulnerabilities.

Patching and Updates

Stay informed about security advisories and apply patches promptly to address known vulnerabilities.