Description
An unauthenticated command injection vulnerability exists in Serviio Media Server versions 1.4 through 1.8 on Windows, in the /rest/action API endpoint exposed by the console component (default port 23423). The checkStreamUrl method accepts a VIDEO parameter that is passed unsanitized to a call to cmd.exe, enabling arbitrary command execution under the privileges of the web server. No authentication is required to exploit this issue, as the REST API is exposed by default and lacks access controls.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-21036
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-21036 is an unauthenticated command injection flaw in Serviio Media Server versions 1.4 through 1.8 on Windows. This vulnerability is located in the /rest/action API endpoint, specifically within the checkStreamUrl method, which accepts a VIDEO parameter that is passed unsanitized to a call to cmd.exe. This allows for arbitrary command execution under the privileges of the web server.
Severity Evaluation:
- CVSS Base Score: 9.3 (Critical)
- CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
The high base score indicates a critical vulnerability due to the following factors:
- Attack Vector (AV:N): Network-based attack, meaning it can be exploited remotely.
- Attack Complexity (AC:L): Low complexity, indicating that the attack is straightforward to execute.
- Privileges Required (PR:N): No privileges are required to exploit this vulnerability.
- User Interaction (UI:N): No user interaction is required.
- Confidentiality (VC:H), Integrity (VI:H), and Availability (VA:H): High impact on all three CIA triad components.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Command Execution: An attacker can send a crafted HTTP request to the
/rest/actionAPI endpoint with a maliciousVIDEOparameter, leading to arbitrary command execution. - Lateral Movement: Once the attacker gains control over the media server, they can use it as a pivot point to move laterally within the network.
Exploitation Methods:
- Direct Exploitation: An attacker can directly exploit the vulnerability by sending a specially crafted HTTP request to the vulnerable endpoint.
- Automated Exploitation: Exploit scripts and frameworks (e.g., Metasploit) can be used to automate the exploitation process, making it easier for attackers to target multiple systems.
3. Affected Systems and Software Versions
Affected Systems:
- Serviio Media Server versions 1.4 through 1.8 on Windows.
Software Versions:
- All versions from 1.4 to 1.8 are vulnerable. It is crucial to identify and update these versions to mitigate the risk.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Patching: Upgrade to a patched version of Serviio Media Server that addresses this vulnerability.
- Access Controls: Implement access controls to restrict access to the
/rest/actionAPI endpoint. - Network Segmentation: Segregate the media server from critical network segments to limit the impact of a potential exploit.
Long-Term Mitigation:
- Regular Audits: Conduct regular security audits and vulnerability assessments.
- Input Validation: Ensure that all user inputs are properly sanitized and validated.
- Monitoring: Implement continuous monitoring and logging to detect and respond to suspicious activities.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations and individuals using Serviio Media Server within the European Union. Given the critical nature of the vulnerability, it could lead to:
- Data Breaches: Unauthorized access to sensitive data.
- Service Disruptions: Compromise of media server functionality, leading to service outages.
- Compliance Issues: Potential violations of GDPR and other regulatory requirements due to unauthorized data access.
6. Technical Details for Security Professionals
Exploit Details:
- Vulnerable Endpoint:
/rest/action - Vulnerable Method:
checkStreamUrl - Vulnerable Parameter:
VIDEO - Exploit Command: The
VIDEOparameter is passed unsanitized tocmd.exe, allowing for command injection.
Detection and Response:
- Log Analysis: Monitor logs for unusual activity related to the
/rest/actionendpoint. - Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious traffic patterns.
- Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.
References:
- Zero Science Vulnerability Report
- Packet Storm News
- Fortinet Encyclopedia
- Metasploit Exploit Module
- VulnCheck Advisory
- Exploit Database
Aliases:
- CVE-2025-34101
Assigner:
- VulnCheck
ENISA IDs:
- Product: Media Server (versions 1.4 through 1.8)
- Vendor: Serviio
By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and protect their digital assets.