CVE-2023-38493 : Security Advisory and Response

This article discusses CVE-2023-38493, which involves paths containing matrix variables bypassing decorators in Armeria microservice framework supported by Spring integration.

Understanding CVE-2023-38493

This vulnerability allows attackers to bypass authorizers by sending specially crafted requests due to Armeria decorators not being invoked because of matrix variables in paths.

What is CVE-2023-38493?

Armeria, a microservice framework supported by Spring integration, allows attackers to bypass authorizers by sending specially crafted requests due to matrix variables in paths not triggering Armeria decorators.

The Impact of CVE-2023-38493

The impact of this vulnerability is rated as HIGH with a CVSS base score of 7.5. Attackers can exploit the vulnerability to achieve high confidentiality impact.

Technical Details of CVE-2023-38493

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Prior to version 1.24.3 of Armeria, the Armeria decorators might not be invoked due to the presence of matrix variables in paths, enabling attackers to bypass authorizers by sending crafted requests.

Affected Systems and Versions

The vulnerability affects Armeria versions prior to 1.24.3.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests with matrix variables in paths, bypassing authorizers.

Mitigation and Prevention

To mitigate the CVE-2023-38493 vulnerability, follow these security practices:

Immediate Steps to Take

Update Armeria to version 1.24.3 or newer to apply the patch for this issue.

Long-Term Security Practices

Regularly update software components and libraries to mitigate potential vulnerabilities.
Implement proper input validation and security controls to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories and updates from Armeria to apply relevant patches promptly.