EUVD-2025-27158

Comprehensive Technical Analysis of EUVD-2025-27158

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-27158, also known as CVE-2025-56266, is a Host Header Injection flaw in Avigilon ACM v7.10.0.20. This vulnerability allows attackers to execute arbitrary code by supplying a crafted URL. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N - Attack Vector: Network
• AC:L - Attack Complexity: Low
• PR:N - Privileges Required: None
• UI:N - User Interaction: None
• S:U - Scope: Unchanged
• C:H - Confidentiality Impact: High
• I:H - Integrity Impact: High
• A:H - Availability Impact: High

This high score underscores the critical nature of the vulnerability, indicating that it can be easily exploited with severe consequences.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is through network access. An attacker can exploit this vulnerability by crafting a malicious URL that includes a specially crafted Host header. This header can be manipulated to inject arbitrary code, which the vulnerable system will execute. The low complexity and lack of required privileges or user interaction make this vulnerability particularly dangerous.

Potential exploitation methods include:

• Phishing Emails: Sending crafted URLs to users, enticing them to click on the links.
• Web Application Attacks: Directly targeting web applications that use the vulnerable Avigilon ACM software.
• Automated Scanning: Using automated tools to scan for vulnerable systems and exploit them en masse.

3. Affected Systems and Software Versions

The vulnerability specifically affects Avigilon ACM v7.10.0.20. Organizations using this version of the software are at risk. It is crucial to identify all instances of this software version within the network and prioritize updates or patches.

4. Recommended Mitigation Strategies

To mitigate the risk posed by this vulnerability, the following strategies are recommended:

• Patch Management: Immediately apply any available patches or updates provided by Avigilon for ACM v7.10.0.20.
• Network Segmentation: Isolate systems running the vulnerable software from critical networks to limit potential damage.
• Input Validation: Implement strict input validation and sanitization for all URLs and headers processed by the system.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity and potential exploitation attempts.
• User Education: Educate users about the risks of clicking on unknown links and the importance of verifying URLs.

5. Impact on European Cybersecurity Landscape

The presence of this critical vulnerability in a widely used software like Avigilon ACM poses a significant risk to European organizations. The potential for arbitrary code execution can lead to data breaches, system compromises, and loss of service availability. This underscores the need for robust cybersecurity measures and continuous monitoring within the European cybersecurity landscape.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Detection: Use network monitoring tools to detect unusual patterns in HTTP headers, particularly the Host header.
• Logging: Ensure comprehensive logging of all HTTP requests and responses to facilitate incident response and forensic analysis.
• Configuration: Review and harden the configuration of Avigilon ACM to minimize the attack surface.
• Testing: Conduct regular penetration testing and vulnerability assessments to identify and address similar vulnerabilities.

References:

• GitHub Repository for Avigilon ACM v7.10.0.20 Host Header Injection
• Detailed Explanation of Host Header Injection

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and protect their systems and data.