CVE-2023-50982 : Vulnerability Insights and Analysis

A critical vulnerability has been identified in Stud.IP 5.x through 5.3.3 that allows for XSS leading to the upload of executable files with subsequent remote code execution. This CVE exposes systems to potential compromise.

Understanding CVE-2023-50982

This section will dive into what CVE-2023-50982 entails, its impact, technical details, and how to mitigate the associated risks.

What is CVE-2023-50982?

CVE-2023-50982 is a Cross-Site Scripting (XSS) vulnerability present in Stud.IP 5.x through 5.3.3. It allows attackers to upload executable files, leading to remote code execution using the privileges of the www-data user.

The Impact of CVE-2023-50982

With a CVSS base score of 9.0, CVE-2023-50982 poses a critical threat to affected systems. Attackers can exploit this vulnerability to execute arbitrary code, compromising confidentiality, integrity, and availability.

Technical Details of CVE-2023-50982

Let's explore the technical aspects of CVE-2023-50982, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw arises from the lack of file extension verification in upload_action and edit_action within Admin_SmileysController. This oversight allows for the upload of executable files, paving the way for remote code execution.

Affected Systems and Versions

Stud.IP versions 5.x through 5.3.3 are affected by this vulnerability. The fixed versions that address this issue include 5.3.4, 5.2.6, 5.1.7, and 5.0.9.

Exploitation Mechanism

By leveraging the XSS vulnerability, threat actors can upload malicious executable files and subsequently execute arbitrary code on the target system with the permissions of the www-data user.

Mitigation and Prevention

Discover the steps to take to safeguard your systems against CVE-2023-50982 and prevent potential exploitation.

Immediate Steps to Take

Update Stud.IP to the fixed versions (5.3.4, 5.2.6, 5.1.7, or 5.0.9) to mitigate the vulnerability.
Implement stringent file upload validation to prevent the execution of malicious files.

Long-Term Security Practices

Regularly monitor and patch software vulnerabilities to prevent exploitation.
Conduct security assessments and penetration testing to identify and remediate potential risks.

Patching and Updates

Stay informed about security updates from Stud.IP and promptly apply patches to ensure your systems are protected against evolving threats.