EUVD-2025-5102

Comprehensive Technical Analysis of EUVD-2025-5102

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-5102 pertains to an OS Command Injection flaw in the WeGIA application, specifically within the gerenciar_backup.php endpoint. This vulnerability allows an attacker to execute arbitrary code remotely, which is a critical security risk. The CVSS (Common Vulnerability Scoring System) base score of 10.0 indicates the highest level of severity. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H breaks down as follows:

• AV:N - Attack Vector: Network
• AC:L - Attack Complexity: Low
• AT:N - Attack Technique: Network
• PR:N - Privileges Required: None
• UI:N - User Interaction: None
• VC:H - Vulnerability Characteristics: High
• VI:H - Vulnerability Impact: High
• VA:H - Vulnerability Availability: High
• SC:H - Scope Change: High
• SI:H - Scope Impact: High
• SA:H - Scope Availability: High

This high severity score underscores the critical nature of the vulnerability, necessitating immediate attention and remediation.

2. Potential Attack Vectors and Exploitation Methods

The OS Command Injection vulnerability can be exploited by sending specially crafted input to the gerenciar_backup.php endpoint. An attacker could inject malicious commands into the input fields processed by this endpoint, leading to arbitrary code execution on the server. Potential attack vectors include:

• Direct Command Injection: An attacker could inject commands directly into the input fields, such as system commands to manipulate files, execute scripts, or gain unauthorized access.
• Chained Exploits: The attacker could use this vulnerability as a stepping stone to further compromise the system, such as by installing backdoors or escalating privileges.

3. Affected Systems and Software Versions

The vulnerability affects all versions of WeGIA prior to 3.2.14. Users of WeGIA, particularly those in Portuguese-speaking regions, are at risk. The affected software versions are:

• WeGIA < 3.2.14

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following steps are recommended:

• Immediate Upgrade: Upgrade to WeGIA version 3.2.14 or later, which addresses the vulnerability.
• Input Validation: Implement robust input validation and sanitization to prevent command injection.
• Least Privilege: Ensure that the application runs with the least privileges necessary to minimize the impact of a successful exploit.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to any suspicious activities.
• Regular Security Audits: Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability in WeGIA, an open-source Web Manager for Institutions, poses a significant risk to the European cybersecurity landscape, particularly for institutions and organizations that rely on this software. The potential for remote code execution can lead to data breaches, unauthorized access, and system compromises, which can have far-reaching implications for data privacy, integrity, and availability.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: gerenciar_backup.php
• Vulnerability Type: OS Command Injection
• Exploitability: High, due to low attack complexity and no user interaction required.

Detection and Response:

• Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor for suspicious activities related to command injection.
• Response: Develop and test incident response plans to quickly identify and mitigate any exploitation attempts.

Code Review:

• Sanitization: Ensure all user inputs are properly sanitized and validated before being processed by the system.
• Escaping: Use appropriate escaping mechanisms to prevent command injection.

References:

• GitHub Advisory: GHSA-g3w6-m6w8-p6r2

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their systems and data from potential attacks.