EUVD-2025-6013

Comprehensive Technical Analysis of EUVD-2025-6013

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in question is a Denial of Service (DoS) issue affecting WeGIA, an open-source Web Manager for Institutions with a focus on Portuguese language users. The vulnerability allows unauthenticated users to render the server unresponsive through aggressive spidering, which involves recursive crawling of dynamically generated URLs and insufficient handling of large volumes of requests.

Severity Evaluation:

• Base Score: 9.2 (Critical)
• Base Score Version: 4.0
• Base Score Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

The high base score indicates a critical vulnerability due to the ease of exploitation (low complexity) and the significant impact on availability (high availability impact).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: The vulnerability can be exploited without any authentication, making it accessible to any attacker.
• Network Access: The attack can be conducted over the network, increasing the potential attack surface.

Exploitation Methods:

• Aggressive Spidering: Attackers can use automated tools to perform aggressive spidering, recursively crawling dynamically generated URLs.
• Request Flooding: By sending a large volume of requests, attackers can overwhelm the server, leading to a DoS condition.

3. Affected Systems and Software Versions

Affected Software:

• WeGIA: Versions prior to 3.2.16

Affected Systems:

• Any system running WeGIA versions below 3.2.16 is vulnerable to this DoS attack.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to WeGIA version 3.2.16 or later, which includes the fix for this vulnerability.
• Rate Limiting: Implement rate limiting on the server to control the number of requests from a single IP address.
• Web Application Firewall (WAF): Deploy a WAF to detect and block aggressive spidering and request flooding attempts.

Long-Term Mitigation:

• Regular Patching: Ensure that all software, including WeGIA, is regularly updated to the latest versions.
• Monitoring: Implement monitoring tools to detect unusual traffic patterns and potential DoS attacks.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability in WeGIA, which is widely used by Portuguese language institutions, poses a significant risk to the European cybersecurity landscape. The ease of exploitation and the critical impact on availability can lead to widespread disruptions in educational and institutional services. This highlights the importance of timely patching and robust security measures to protect against such vulnerabilities.

6. Technical Details for Security Professionals

Vulnerability Details:

• Cause: The vulnerability is caused by recursive crawling of dynamically generated URLs and insufficient handling of large volumes of requests.
• Fix: The issue is addressed in WeGIA version 3.2.16, which includes improvements in request handling and rate limiting mechanisms.

References:

• GitHub Advisory: GHSA-9rp6-4mqp-g4p8
• Commit Reference: 624ddfadb3fd8f8b30ad4f601b032a9bacc86a39

ENISA IDs:

• Product: [a5e2bc96-f3f2-3e99-9d48-610387d23270](WeGIA versions < 3.2.16)
• Vendor: 678b4513-fa49-3af6-8ea5-94dc5140678c

Aliases:

• CVE-2025-27419

Assigner:

• GitHub_M

EPSS:

• N/A

Conclusion

The DoS vulnerability in WeGIA is a critical issue that requires immediate attention. Organizations using WeGIA should prioritize upgrading to the patched version and implement additional security measures to mitigate the risk. This vulnerability underscores the importance of proactive security management in protecting institutional web services from potential disruptions.