CVE-2020-5398 : Security Advisory and Response

In Spring Framework, versions 5.2.x prior to 5.2.3, versions 5.1.x prior to 5.1.13, and versions 5.0.x prior to 5.0.16, an application is vulnerable to a reflected file download (RFD) attack when it sets a "Content-Disposition" header in the response where the filename attribute is derived from user supplied input.

Understanding CVE-2020-5398

This CVE highlights a vulnerability in Spring Framework versions that can lead to a reflected file download (RFD) attack.

What is CVE-2020-5398?

CVE-2020-5398 is a security vulnerability in Spring Framework versions 5.2.x, 5.1.x, and 5.0.x that allows for a reflected file download attack when certain conditions are met.

The Impact of CVE-2020-5398

The vulnerability has a CVSS base score of 8.0, indicating a high severity level. It can lead to high impacts on confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2020-5398

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows for a reflected file download (RFD) attack when a specific header is set in the response.

Affected Systems and Versions

Spring Framework versions 5.2.x (prior to 5.2.3)
Spring Framework versions 5.1.x (prior to 5.1.13)
Spring Framework versions 5.0.x (prior to 5.0.16)

Exploitation Mechanism

The vulnerability occurs when the "Content-Disposition" header in the response uses a filename attribute derived from user input.

Mitigation and Prevention

To address CVE-2020-5398, follow these mitigation strategies:

Immediate Steps to Take

Update Spring Framework to versions 5.2.3, 5.1.13, or 5.0.16 to patch the vulnerability.
Avoid using user input to derive filenames in the "Content-Disposition" header.

Long-Term Security Practices

Regularly monitor and apply security updates for all software components.
Implement input validation mechanisms to prevent malicious user input.

Patching and Updates

Stay informed about security alerts and updates from Spring and other relevant sources.
Apply patches promptly to ensure the security of your systems.