CVE-2023-27474 : Exploit Details and Defense Strategies

This CVE, assigned the ID of CVE-2023-27474, involves HTML Injection in the Password Reset email to custom Reset URL in Directus. It was published on March 6, 2023.

Understanding CVE-2023-27474

This vulnerability in Directus affects systems that utilize an allow-listed reset URL, potentially making them susceptible to an HTML injection attack through the use of query parameters in the reset URL.

What is CVE-2023-27474?

Directus is a real-time API and App dashboard designed for managing SQL database content. In this specific case, instances relying on an allow-listed reset URL are at risk of an HTML injection attack. This means that an attacker could exploit this vulnerability to send users URLs containing malicious code. The issue has been addressed and fixed in version 9.23.0 of Directus. Individuals who rely on a custom password reset URL are strongly recommended to upgrade to version 9.23.0 or later. Alternatively, they can remove the custom reset URL from the configured allow list. Users are encouraged to upgrade their systems to ensure security.

The Impact of CVE-2023-27474

The CVSS v3.1 base severity score for CVE-2023-27474 is high (8.0), with a high impact on confidentiality and integrity. The attack complexity is classified as high, with user interaction required. The scope of the vulnerability is considered changed, with no privileges required for exploitation and no availability impact.

Technical Details of CVE-2023-27474

This section delves into the specific aspects of the vulnerability.

Vulnerability Description

The vulnerability stems from the improper neutralization of input during web page generation, leading to HTML injection in the Password Reset email using a custom Reset URL in Directus.

Affected Systems and Versions

The affected vendor is Directus, with the product being Directus itself. Versions prior to 9.23.0 are vulnerable to this HTML injection issue.

Exploitation Mechanism

To exploit this vulnerability, an attacker would manipulate query parameters in the reset URL of instances relying on an allow-listed custom reset URL, potentially injecting malicious HTML code.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Users and administrators should upgrade their Directus installations to version 9.23.0 or later. Alternatively, they can mitigate the risk by removing the custom reset URL from the configured allow list.

Long-Term Security Practices

Regularly updating software and maintaining a robust security posture by following best practices for secure coding and configuration can help prevent similar vulnerabilities in the future.

Patching and Updates

Directus has released a fix for this vulnerability in version 9.23.0. It is recommended that users apply the patch promptly to secure their systems from potential exploits.