CVE-2017-18357 : Vulnerability Insights and Analysis

Shopware before version 5.3.4 is vulnerable to a PHP Object Instantiation issue that can lead to an XXE vulnerability when a malicious input is provided to a specific method.

Understanding CVE-2017-18357

This CVE involves a security vulnerability in Shopware versions prior to 5.3.4 that allows for the exploitation of an XXE vulnerability through a specific method.

What is CVE-2017-18357?

This CVE refers to a PHP Object Instantiation problem in Shopware versions earlier than 5.3.4, where a malicious input can trigger an XXE vulnerability.

The Impact of CVE-2017-18357

The vulnerability can be exploited by providing a malicious input as the "sort" parameter to the loadPreviewAction() method of the Shopware_Controllers_Backend_ProductStream controller, potentially leading to an XXE vulnerability.

Technical Details of CVE-2017-18357

Shopware before version 5.3.4 is susceptible to a PHP Object Instantiation issue that can result in an XXE vulnerability.

Vulnerability Description

The vulnerability arises from providing a malicious input as the "sort" parameter to the loadPreviewAction() method of the Shopware_Controllers_Backend_ProductStream controller, allowing for the exploitation of an XXE vulnerability.

Affected Systems and Versions

Shopware versions earlier than 5.3.4

Exploitation Mechanism

The issue can be triggered by manipulating the "sort" parameter in the loadPreviewAction() method of the Shopware_Controllers_Backend_ProductStream controller, enabling the creation of a SimpleXMLElement object that can be exploited for XXE attacks.

Mitigation and Prevention

To address CVE-2017-18357, follow these mitigation strategies:

Immediate Steps to Take

Upgrade Shopware to version 5.3.4 or later to mitigate the vulnerability.
Implement input validation to sanitize user inputs and prevent malicious data.

Long-Term Security Practices

Regularly update and patch Shopware to ensure the latest security fixes are in place.
Conduct security audits and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches and updates provided by Shopware promptly to address security vulnerabilities.