CVE-2023-2544 : Exploit Details and Defense Strategies

This CVE-2023-2544 was published by INCIBE on October 3, 2023. It involves an authorization bypass vulnerability in UPV PEIX, impacting the component "pdf_curri_new.php". The vulnerability allows an authenticated user to manipulate the ID parameter through a POST request, leading to unauthorized access to the stored information of other registered users.

Understanding CVE-2023-2544

This section will delve into the details of CVE-2023-2544, including the vulnerability description, impact, affected systems, exploitation mechanism, and mitigation strategies.

What is CVE-2023-2544?

CVE-2023-2544 is an authorization bypass vulnerability in UPV PEIX, allowing authenticated users to access confidential information of other users by changing the ID parameter via a POST request.

The Impact of CVE-2023-2544

The impact of this vulnerability is medium, with a CVSS v3.1 base score of 5.3. It poses a risk to the confidentiality of user data but does not directly impact system integrity or availability.

Technical Details of CVE-2023-2544

In this section, we will explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in UPV PEIX's "pdf_curri_new.php" component allows authenticated users to bypass authorization controls by modifying the ID parameter in a POST request, enabling access to sensitive information.

Affected Systems and Versions

The vulnerability affects all versions of the UPV PEIX product offered by Universitat Politècnica de València (UPV).

Exploitation Mechanism

By manipulating the ID parameter in a POST request, authenticated users can exploit the vulnerability to retrieve the stored information of other registered users, leading to unauthorized access.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-2544, immediate steps, long-term security practices, and the importance of patching and updates are crucial.

Immediate Steps to Take

It is recommended to apply the security update released in August 2022 to address the vulnerability and prevent unauthorized access to user data.

Long-Term Security Practices

Implementing robust authentication and authorization mechanisms, regular security assessments, and user access controls can help enhance the security posture of systems like UPV PEIX.

Patching and Updates

Regularly monitoring for security updates and promptly applying patches provided by the vendor is essential to prevent exploitation of known vulnerabilities like the one disclosed in CVE-2023-2544.