EUVD-2025-8247

Comprehensive Technical Analysis of EUVD-2025-8247

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-8247 affects the Telesquare TLR-2005KSH version 1.1.4, specifically involving an unauthorized stack overflow when the admin.cgi parameter is requested with setSyncTimeHost. 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:

• 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) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

Given these metrics, the vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through network access, specifically targeting the admin.cgi parameter with setSyncTimeHost. An attacker could exploit this vulnerability by crafting a malicious request that triggers a stack overflow, leading to arbitrary code execution. Potential exploitation methods include:

• Remote Code Execution (RCE): By sending a specially crafted request, an attacker could execute arbitrary code on the affected device.
• Denial of Service (DoS): The stack overflow could cause the device to crash, leading to a denial of service.
• Data Exfiltration: An attacker could potentially exfiltrate sensitive data by exploiting the vulnerability to gain unauthorized access.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Telesquare TLR-2005KSH version 1.1.4

Other versions of the TLR-2005KSH and related products should be reviewed for similar vulnerabilities, as they may also be affected.

4. Recommended Mitigation Strategies

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

• Patch Management: Apply the latest patches and updates provided by Telesquare. If a patch is not available, consider upgrading to a newer, unaffected version.
• Network Segmentation: Isolate affected devices on a separate network segment to limit potential attack vectors.
• Access Controls: Implement strict access controls to limit network access to the affected devices.
• Intrusion Detection/Prevention Systems (IDS/IPS): Deploy IDS/IPS to monitor and block suspicious network traffic targeting the admin.cgi parameter.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals using the Telesquare TLR-2005KSH device. The critical nature of the vulnerability means that unpatched devices are at high risk of being compromised, leading to potential data breaches, service disruptions, and other security incidents. Organizations should prioritize addressing this vulnerability to maintain the integrity and security of their networks.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Type: Unauthorized stack overflow
• Affected Parameter: admin.cgi with setSyncTimeHost
• Exploitation Method: Crafting a malicious request to trigger the stack overflow
• Detection: Monitor network traffic for unusual requests targeting the admin.cgi parameter. Use IDS/IPS signatures to detect and block such requests.
• Mitigation: Implement network-level protections and ensure that affected devices are patched or upgraded. Regularly review and update security policies to address similar vulnerabilities.

References

• GitHub Repository
• GitHub Repository
• NVD Entry

Conclusion

The vulnerability EUVD-2025-8247 is critical and requires immediate attention. Organizations should prioritize patching affected devices and implementing robust security measures to mitigate the risk. Continuous monitoring and regular security assessments are essential to maintain a strong cybersecurity posture.