Smartbedded Meteobridge Unauthenticated Remote Code Execution (RCE) and Command Injection Vulnerability Advisory (CVE-2025-4008)
Executive & SecOps Summary
SECOPS ASSESSMENTWeb management interface of Smartbedded Meteobridge weather station devices
Adjacent unauthenticated attackers can execute arbitrary system commands with root privileges, leading to full device compromise
Apply the latest firmware patches immediately and restrict network access to the web administration interface
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the official firmware update via the Meteobridge administration panel. To verify the current running version or check the HTTP headers of the device, use the following command:
# Check the HTTP response headers of the Meteobridge web interface
curl -s -I http://[METEOBRIDGE_IP]/cgi-bin/meteobridge.cgi | grep -E -i 'server|version'2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict access to the web interface using firewall rules. Ensure the device is not exposed to untrusted networks and limit access to authorized administrative IPs only.
# Restrict access to the Meteobridge web interface (port 80) to a trusted admin IP (e.g., 192.168.1.100)
iptables -A INPUT -p tcp -s 192.168.1.100 --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP3. Log Audit & IoC Verification Commands
Inspect the web server access logs for suspicious CGI requests containing shell metacharacters or outbound connection attempts (e.g., curl, wget, sh).
# Scan web server access logs for potential command injection payloads
grep -E '(\;|\||\&\&|\`|\$\()' /var/log/lighttpd/access.log 2>/dev/null || echo 'No obvious command injection patterns found in default logs.'Stop Exposing VPN Ports to the Internet — Switch to Zero-Trust Access
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2025-4008) exists in the web management interface of Smartbedded Meteobridge devices, which is implemented using CGI shell scripts and C. The root cause is a combination of missing authentication (CWE-306) on a specific endpoint and improper input validation leading to OS command injection (CWE-77). The application fails to sanitize user-supplied input before passing it to system shell execution contexts.
2. Exploitation Mechanics & Attack Scenario
An attacker with adjacent network access can target the vulnerable CGI endpoint without any prior authentication. By sending a crafted HTTP request containing shell metacharacters (such as ';', '&&', or '|') within the parameters, the attacker can inject arbitrary commands. Because the underlying web server process runs with elevated privileges, the injected commands are executed directly as the 'root' user, granting the attacker complete control over the operating system.
3. Infrastructure & Business Impact
With a CVSS score of 8.8 and an EPSS score of 0.9332, this vulnerability is highly critical and is actively exploited in the wild, as confirmed by its inclusion in the CISA KEV catalog. Successful exploitation allows attackers to manipulate weather data, brick the device, or use the compromised hardware as a pivot point to launch lateral movement attacks inside the internal network.
Official Vendor Advisories & References
The Meteobridge web interface let meteobridge administrator manage their weather station data collection and administer their meteobridge system through a web application written in CGI shell scripts and C. This web interface exposes an endpoint that is vulnerable to command injection. Remote unauthenticated attackers can gain arbitrary command execution with elevated privileges ( root ) on affected devices.
Frequently Asked SecOps Questions (CVE-2025-4008)
FAQQ1. How critical is CVE-2025-4008 and is it actively exploited in the wild?
CVE-2025-4008 is rated CVSS 8.8 (HIGH) with a 30-day EPSS exploitation probability of 93.3%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2025-4008?
Primary impacted vendors include smartbedded across meteobridge. Scope summary: Smartbedded Meteobridge weather station devices (all versions prior to the patched release)
Q3. What temporary mitigations or workarounds exist for CVE-2025-4008 before patching?
[Mitigation] Apply the latest firmware patches immediately and restrict network access to the web administration interface Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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