EUVD-2025-19644

Comprehensive Technical Analysis of EUVD-2025-19644

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-19644 describes an unauthenticated command injection flaw in AVTECH DVR devices. This vulnerability allows attackers to inject shell commands through the username or queryb64str parameters in the Search.cgi?action=cgi_query endpoint. The use of wget without proper input sanitization enables the execution of these commands with root privileges.

Severity Evaluation:

• CVSS Base Score: 10.0 (Critical)
• CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

The high CVSS score indicates that this vulnerability is extremely severe. It can be exploited remotely (AV:N) with low complexity (AC:L), does not require any form of authentication (PR:N), and has a high impact on confidentiality, integrity, and availability (VC:H, VI:H, VA:H).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Remote Command Execution: An attacker can send crafted HTTP requests to the vulnerable endpoint, injecting shell commands that will be executed with root privileges.
2. Unauthenticated Access: The vulnerability does not require any authentication, making it accessible to any attacker with network access to the device.

Exploitation Methods:

1. Direct Exploitation: An attacker can directly send a malicious HTTP request to the Search.cgi?action=cgi_query endpoint with injected shell commands.
2. Automated Scripts: Attackers can use automated scripts to scan for vulnerable devices and exploit them en masse.

3. Affected Systems and Software Versions

The vulnerability affects multiple versions of AVTECH DVR devices, as listed in the ENISA ID Product section. Specifically, the affected versions include:

• 1009-1003-1006-1001
• 1014-1005-1009-1002
• 1008-1002-1005-1000
• 1019c-1012c-1014c-1001c-FFFF
• 1022Y-1014Y-1016Y-1002Y-FFFF
• 1019-1009-1013-1003
• 1023-1014-1017-1002-FFFF
• 1010-1004-1007-1001
• 1009Y-1003Y-1006Y-1001Y
• 1017-1008-1012-1002
• 1016-1007-1011-1003
• 1018-1008-1012-1004
• 1015-1006-1010-1003
• 1017Y-1008Y-1012Y-1002Y
• 1022-1014-1016-1002-FFFF
• 1011-1005-1008-1002

4. Recommended Mitigation Strategies

1. Patch Management: Ensure that all AVTECH DVR devices are updated to the latest firmware version that addresses this vulnerability.
2. Network Segmentation: Isolate DVR devices from public networks and restrict access to trusted IP addresses.
3. Input Validation: Implement strict input validation and sanitization for all user inputs, especially in web interfaces.
4. Access Controls: Enforce strong authentication and access controls to limit unauthorized access.
5. Monitoring and Logging: Implement robust monitoring and logging to detect and respond to suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly in sectors that rely heavily on surveillance and security systems, such as:

• Critical Infrastructure: Power plants, water treatment facilities, and transportation systems.
• Public Safety: Law enforcement agencies and emergency services.
• Commercial Sector: Retail stores, offices, and other commercial properties.

The potential for widespread exploitation and the critical nature of the affected devices make this vulnerability a high priority for immediate remediation.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: Search.cgi?action=cgi_query
• Parameters: username, queryb64str
• Exploit Method: Inject shell commands via these parameters using wget without input sanitization.

Example Exploit:

wget "http://<target_ip>/Search.cgi?action=cgi_query&username=`<malicious_command>`"

Detection and Response:

• Intrusion Detection Systems (IDS): Configure IDS to detect and alert on suspicious traffic patterns targeting the vulnerable endpoint.
• Incident Response: Develop and implement an incident response plan to quickly identify and mitigate any exploitation attempts.

References:

• Exploit Database
• AVTECH Official Website
• Search Lab Advisory
• GitHub Repository
• VulnCheck Advisory

This comprehensive analysis underscores the critical nature of the vulnerability and the urgent need for mitigation strategies to protect affected systems and maintain the integrity of the European cybersecurity landscape.