Description
In HylaFAX Enterprise Web Interface and AvantFAX, the language form element is not properly sanitized before being used and can be misused to include an arbitrary file in the PHP code allowing an attacker to do anything as the web server user. This flaw requires the attacker to be authenticated with a valid user account.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-10912
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description: The vulnerability in HylaFAX Enterprise Web Interface and AvantFAX involves improper sanitization of the language form element. This flaw allows an authenticated attacker to include an arbitrary file in the PHP code, potentially leading to remote code execution (RCE) with the privileges of the web server user.
Severity Evaluation:
The Base Score of 9.9 (CVSS:3.1) indicates a critical vulnerability. The vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:
- AV:N (Network): The vulnerability is exploitable over the network.
- AC:L (Low): The attack complexity is low.
- PR:L (Low): The attacker requires low privileges (authenticated user).
- UI:N (None): No user interaction is required.
- S:C (Changed): The vulnerability affects the confidentiality, integrity, and availability of the system.
- C:H (High), I:H (High), A:H (High): The impact on confidentiality, integrity, and availability is high.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Authenticated User Exploit: An attacker with valid user credentials can exploit the vulnerability by manipulating the language form element to include malicious PHP code.
- Remote Code Execution (RCE): The attacker can execute arbitrary code on the server, leading to full control over the web server.
Exploitation Methods:
- File Inclusion: The attacker can include a malicious PHP file that executes arbitrary commands.
- Privilege Escalation: Once the attacker gains control over the web server, they can escalate privileges to gain further access to the system.
3. Affected Systems and Software Versions
Affected Systems:
- HylaFAX Enterprise Web Interface
- AvantFAX
Software Versions:
- Specific versions affected are not mentioned in the entry. It is crucial to check the vendor's security advisory for detailed version information.
4. Recommended Mitigation Strategies
Immediate Actions:
- Patch Management: Apply the latest security patches provided by the vendor.
- Access Control: Restrict access to the web interface to trusted users only.
- Input Validation: Implement additional input validation and sanitization mechanisms.
Long-Term Strategies:
- Regular Audits: Conduct regular security audits and vulnerability assessments.
- Monitoring: Implement continuous monitoring to detect and respond to suspicious activities.
- User Education: Educate users about the importance of strong passwords and the risks associated with phishing attacks.
5. Impact on European Cybersecurity Landscape
Regulatory Compliance:
- Organizations using HylaFAX or AvantFAX must comply with GDPR and other relevant regulations to protect user data.
- Failure to address this vulnerability can result in data breaches, leading to regulatory fines and reputational damage.
Cybersecurity Posture:
- The vulnerability highlights the need for robust cybersecurity measures, including regular updates and proactive threat detection.
- European organizations must prioritize cybersecurity to protect against such critical vulnerabilities.
6. Technical Details for Security Professionals
Technical Analysis:
- Code Review: Conduct a thorough code review to identify and fix improper sanitization of user inputs.
- Security Testing: Perform penetration testing to identify and mitigate similar vulnerabilities.
- Logging and Monitoring: Implement comprehensive logging and monitoring to detect and respond to exploitation attempts.
Mitigation Steps:
- Update Software: Ensure that all instances of HylaFAX and AvantFAX are updated to the latest patched versions.
- Input Sanitization: Implement robust input sanitization mechanisms to prevent arbitrary file inclusion.
- Access Controls: Enforce strict access controls and regularly review user permissions.
- Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities.
Conclusion: The vulnerability EUVD-2025-10912 is critical and requires immediate attention. Organizations must prioritize patching and implementing robust security measures to mitigate the risk. Regular audits and continuous monitoring are essential to maintain a strong cybersecurity posture.
References:
This comprehensive analysis provides a clear understanding of the vulnerability, its impact, and the necessary steps to mitigate the risk effectively.