CVE-2022-31129 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2022-31129, highlighting its impact, technical details, and mitigation strategies.

Understanding CVE-2022-31129

CVE-2022-31129 is related to an inefficient regular expression complexity in the 'moment' JavaScript date library.

What is CVE-2022-31129?

The vulnerability in 'moment' arises from an inefficient parsing algorithm with quadratic complexity, leading to (Re)DoS attacks when parsing large inputs. Users are advised to update to version 2.29.4.

The Impact of CVE-2022-31129

Users utilizing affected versions of 'moment' may experience a notable slowdown with inputs exceeding 10k characters. Passing user-provided strings without length checks to the library's constructor can make systems vulnerable to denial-of-service attacks.

Technical Details of CVE-2022-31129

Vulnerability Description

The issue stems from using an inefficient parsing algorithm with quadratic complexity in 'moment'. It is patched in version 2.29.4.

Affected Systems and Versions

Versions >= 2.18.0 and < 2.29.4 of 'moment' are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing large inputs to 'moment' without length verification, leading to potential denial-of-service incidents.

Mitigation and Prevention

Immediate Steps to Take

Users are strongly encouraged to upgrade to 'moment' version 2.29.4 to mitigate the vulnerability. Implement sanity length checks for user-provided input to prevent (Re)DoS attacks.

Long-Term Security Practices

Regularly monitor security advisories related to 'moment' and other libraries in use. Ensure timely patching and updates to safeguard against known vulnerabilities.

Patching and Updates

Apply the available patch for 'moment' across affected versions. Consider limiting the length of date inputs accepted from users as a proactive measure.