CVE-2023-4564 : Exploit Details and Defense Strategies

This is a detailed analysis of CVE-2023-4564, which involves multiple vulnerabilities in Canopsis, a product of Capensis, as discovered by Pedro José Navas Pérez and reported by INCIBE.

Understanding CVE-2023-4564

This vulnerability allows an attacker to inject a malicious JavaScript payload into the broadcast message parameter within the Canopsis admin panel.

What is CVE-2023-4564?

CVE-2023-4564 is a vulnerability that enables an attacker to store malicious JavaScript code in the broadcast message parameter in the Canopsis admin panel, potentially leading to further exploitation and attacks.

The Impact of CVE-2023-4564

The impact of CVE-2023-4564, rated as a CVSSv3.1 base score of 4.7 (Medium), allows an attacker with high privileges to execute a Cross-Site Scripting (XSS) attack, compromising the confidentiality and integrity of the system with low availability impact.

Technical Details of CVE-2023-4564

This section covers specific technical details related to CVE-2023-4564.

Vulnerability Description

The vulnerability lies in the improper neutralization of input during web page generation (Cross-Site Scripting - XSS), enabling an attacker to inject and execute malicious JavaScript code within the Canopsis admin panel.

Affected Systems and Versions

The affected product is Canopsis version 23.04-alpha3, impacting systems leveraging this specific version running Capensis' software.

Exploitation Mechanism

The vulnerability can be exploited by an attacker with high privileges within the Canopsis admin panel by injecting a crafted payload into the broadcast message parameter.

Mitigation and Prevention

To address CVE-2023-4564, the following mitigation and prevention measures are recommended:

Immediate Steps to Take

Implement input validation and encoding mechanisms to prevent malicious payload injection.
Restrict user privileges to limit access to critical parameters within the admin panel.
Regularly monitor and audit the admin panel for suspicious activities or injections.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and remediate potential vulnerabilities.
Stay informed about security updates and patches released by Capensis for Canopsis to address known vulnerabilities.

Patching and Updates

Apply security patches and updates provided by the vendor promptly to fix the vulnerability and enhance the security posture of Canopsis installations.