CVE-2019-7928 : Security Advisory and Response

Magento versions 2.1 before 2.1.18, 2.2 before 2.2.9, and 2.3 before 2.3.2 have a denial-of-service vulnerability that could disrupt transactions between a Magento merchant and PayPal.

Understanding CVE-2019-7928

This CVE identifies a denial-of-service vulnerability in specific versions of Magento that could be exploited by unauthorized attackers.

What is CVE-2019-7928?

A denial-of-service (DoS) vulnerability in Magento versions 2.1 prior to 2.1.18, 2.2 prior to 2.2.9, and 2.3 prior to 2.3.2 allows attackers to disrupt transactions by exploiting weak brute-forcing defenses in the token exchange protocol.

The Impact of CVE-2019-7928

This vulnerability could potentially disrupt transactions between Magento merchants and PayPal, impacting the integrity and availability of e-commerce operations.

Technical Details of CVE-2019-7928

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Magento versions 2.1 before 2.1.18, 2.2 before 2.2.9, and 2.3 before 2.3.2 is a denial-of-service (DoS) issue that stems from insufficient brute-forcing defenses in the token exchange protocol.

Affected Systems and Versions

Affected Product: Magento 2
Vulnerable Versions: Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2

Exploitation Mechanism

Attackers can exploit this vulnerability to disrupt transactions between Magento merchants and PayPal by taking advantage of the weak brute-forcing defenses in the token exchange protocol.

Mitigation and Prevention

Protecting systems from CVE-2019-7928 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the security patch provided by Magento for versions 2.1.18, 2.2.9, and 2.3.2 to mitigate the vulnerability.
Monitor transactions and system logs for any suspicious activities that could indicate an ongoing attack.

Long-Term Security Practices

Regularly update Magento and other software components to ensure the latest security patches are in place.
Implement strong authentication mechanisms and access controls to prevent unauthorized access.

Patching and Updates

Magento has released security updates for versions 2.1.18, 2.2.9, and 2.3.2 to address the vulnerability. Ensure timely application of these patches to secure your systems.