EUVD-2025-8244

Comprehensive Technical Analysis of EUVD-2025-8244

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-8244 affects the Telesquare TLR-2005KSH device running firmware version 1.1.4. The issue is a stack overflow vulnerability that can be triggered by sending a specially crafted request to the admin.cgi parameter with setNtp. This vulnerability has a CVSS Base Score of 9.8, indicating 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:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability allows for high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability allows for high impact on integrity.
• Availability (A): High (H) - The vulnerability allows for high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through network access to the admin.cgi endpoint of the Telesquare TLR-2005KSH device. An attacker can exploit this vulnerability by sending a maliciously crafted HTTP request to the setNtp parameter, causing a stack overflow. This can lead to arbitrary code execution, allowing the attacker to gain control over the device.

Potential exploitation methods include:

• Remote Code Execution (RCE): By exploiting the stack overflow, an attacker can inject and execute arbitrary code on the device.
• Denial of Service (DoS): The stack overflow can cause the device to crash, leading to a denial of service.
• Data Exfiltration: An attacker could potentially exfiltrate sensitive data stored on the device.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Device: Telesquare TLR-2005KSH
• Firmware Version: 1.1.4

Other versions of the firmware and similar devices from Telesquare should be checked for similar vulnerabilities.

4. Recommended Mitigation Strategies

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

• Patch Management: Immediately apply any available patches or updates from the vendor.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit exposure.
• Access Control: Implement strict access controls to limit who can access the admin.cgi endpoint.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity targeting the admin.cgi endpoint.
• Firewall Rules: Configure firewalls to block unauthorized access to the admin.cgi endpoint.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations and individuals using the Telesquare TLR-2005KSH device, particularly within the European Union. The high severity score and the potential for remote code execution make it a critical concern for cybersecurity professionals. Organizations should prioritize patching and implementing mitigation strategies to protect against potential attacks.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Stack Overflow
• Endpoint: admin.cgi
• Parameter: setNtp
• Exploit Method: Sending a specially crafted HTTP request to the setNtp parameter.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the admin.cgi endpoint.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous behavior that may indicate an exploit attempt.
• Incident Response: Have an incident response plan in place to quickly address any detected exploits.

References:

• GitHub Repository: Fan-24/Digging
• NVD Entry: CVE-2025-26005

By following these recommendations and staying vigilant, organizations can significantly reduce the risk posed by this vulnerability.