EUVD-2024-1850

Comprehensive Technical Analysis of EUVD-2024-1850

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: Froxlor, an open-source server administration software, has a Stored Blind Cross-Site Scripting (XSS) vulnerability in its Failed Login Attempts Logging Feature. This vulnerability allows an unauthenticated user to inject malicious scripts into the loginname parameter during a login attempt. These scripts are executed when an administrator views the system logs.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.7, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): Required (R)
• Scope (S): Changed (C)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity score underscores the potential for significant impact on confidentiality, integrity, and availability of the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated User: An attacker can exploit this vulnerability without needing any authentication.
• Malicious Script Injection: The attacker injects malicious scripts into the loginname parameter during a failed login attempt.
• Administrator Viewing Logs: The injected scripts are executed when an administrator views the system logs, leading to various malicious actions.

Exploitation Methods:

• Script Execution: The attacker can inject JavaScript or other scripts that will be executed in the context of the administrator's session.
• Session Hijacking: The attacker can steal the administrator's session cookies, leading to unauthorized access.
• Privilege Escalation: The attacker can force the administrator to perform actions such as adding a new administrator account controlled by the attacker.

3. Affected Systems and Software Versions

Affected Software:

• Froxlor versions prior to 2.1.9.

Affected Systems:

• Any server or system running the vulnerable versions of Froxlor.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to Froxlor version 2.1.9 or later, which includes the fix for this vulnerability.
• Disable Logging: Temporarily disable the Failed Login Attempts Logging Feature until the software is updated.

Long-Term Strategies:

• Regular Patching: Implement a regular patching and update schedule for all software.
• Input Validation: Ensure robust input validation and sanitization mechanisms are in place.
• Security Training: Educate administrators and users about the risks of XSS and other web-based attacks.
• Monitoring: Implement continuous monitoring and logging to detect and respond to suspicious activities.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• Organizations using Froxlor must ensure compliance with regulations such as GDPR, which mandates the protection of personal data.
• Failure to address this vulnerability could result in data breaches, leading to regulatory penalties and loss of trust.

Cybersecurity Posture:

• The vulnerability highlights the importance of timely patch management and the need for robust security practices within organizations.
• European cybersecurity agencies may issue advisories and guidelines to mitigate similar vulnerabilities in other software.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Stored Blind XSS
• Location: Failed Login Attempts Logging Feature
• Parameter: loginname
• Impact: Execution of malicious scripts in the context of the administrator's session.

References:

• GitHub Advisory: GHSA-x525-54hf-xr53
• NVD Entry: CVE-2024-34070
• GitHub Commit: a862307bce5cdfb1c208b835f3e8faddd23046e6
• Froxlor Repository: Froxlor GitHub

EPSS Score:

• The EPSS (Exploit Prediction Scoring System) score of 2 indicates a relatively low likelihood of exploitation in the wild, but this should not deter organizations from taking immediate mitigation actions.

Conclusion: The Stored Blind XSS vulnerability in Froxlor is a critical issue that requires immediate attention. Organizations should prioritize updating to the patched version and implement robust security measures to prevent similar vulnerabilities in the future. The European cybersecurity landscape demands vigilance and proactive measures to safeguard against such threats.