CVE-2023-27639 : Exploit Details and Defense Strategies

This is a detailed overview of CVE-2023-27639, providing essential information about the vulnerability, its impact, technical details, and mitigation strategies.

Understanding CVE-2023-27639

This section delves into the specifics of the CVE-2023-27639 vulnerability, shedding light on its nature and implications.

What is CVE-2023-27639?

CVE-2023-27639 pertains to a security flaw identified in the tshirtecommerce component version 2.1.4 for PrestaShop. It involves the ability to forge an HTTP request utilizing the POST parameter file_name in the tshirtecommerce/ajax.php?type=svg endpoint. This vulnerability permits a remote attacker to traverse directories on the system, enabling the opening of files without any restrictions on the file extension and path. However, only files that can be parsed in XML format are accessible. Notably, this exploitation was observed in the wild in March 2023.

The Impact of CVE-2023-27639

The CVE-2023-27639 vulnerability poses a significant risk as it allows malicious actors to bypass restrictions and potentially access sensitive files on affected systems. This could lead to unauthorized information disclosure and further exploitation of the compromised system.

Technical Details of CVE-2023-27639

This section provides a more technical overview of the CVE-2023-27639 vulnerability, including its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in tshirtecommerce component version 2.1.4 for PrestaShop enables the manipulation of HTTP requests to traverse directories and open files on the system without proper authorization, thereby exposing sensitive data to unauthorized entities.

Affected Systems and Versions

The CVE-2023-27639 vulnerability affects the tshirtecommerce component version 2.1.4 for PrestaShop. The exploitation of this vulnerability can impact systems running this specific version of the component.

Exploitation Mechanism

By exploiting the HTTP request manipulation capability in the tshirtecommerce/ajax.php?type=svg endpoint with the file_name POST parameter, attackers can navigate through directories on the system to access and open files that are in XML format, posing a security risk to the affected systems.

Mitigation and Prevention

This section outlines the steps that can be taken to mitigate the risks associated with CVE-2023-27639 and prevent potential exploits.

Immediate Steps to Take

Disable or restrict access to the vulnerable tshirtecommerce component.
Implement network-level controls to monitor and block malicious HTTP requests.
Regularly monitor system logs for any suspicious activities related to directory traversal or unauthorized file access.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities proactively.
Keep software and applications up to date to patch known security flaws and prevent exploitation.
Educate users and administrators about secure coding practices and the importance of maintaining a secure system environment.

Patching and Updates

Stay informed about security advisories and updates released by relevant vendors and apply patches promptly to address known vulnerabilities and enhance the overall security posture of the system.