ONEKEY Analysis Lab has uncovered a extreme command injection vulnerability within the MeteoBridge firmware, a compact gadget designed to attach private climate stations to public climate networks like Climate Underground.
This flaw, recognized by way of ONEKEY’s not too long ago launched bash static code evaluation on their platform, impacts variations 6.1 and under of the MeteoBridge firmware, enabling distant, unauthenticated attackers to execute arbitrary instructions with root privileges.
The vulnerability, now assigned CVE-2025-4008, has been patched in model 6.2 following a coordinated disclosure course of. With a CVSS rating of 8.7 (Excessive), the impression of this challenge underscores the vital want for strong firmware safety in Web-connected units.
Essential Flaw Exposes Climate Station Gadgets
The vulnerability resides within the MeteoBridge net interface, particularly throughout the CGI shell script accessible at /cgi-bin/template.cgi.
This endpoint processes consumer enter from the $QUERY_STRING variable with out correct sanitization, feeding it instantly into an eval name a infamous vector for command injection assaults.
Because of this, malicious actors can craft HTTP requests to execute arbitrary system instructions on the gadget.
Making issues worse, an authentication bypass exists on account of a misconfiguration within the uhttpd server settings.
Unauthenticated Exploitation through Public Endpoint
Whereas sure directories like /cgi-bin are protected by fundamental authentication, the affected script can also be uncovered in an unprotected /public listing, permitting attackers to bypass login necessities solely.
This twin flaw signifies that anybody with community entry probably even over the Web can exploit the system with out credentials.
Shodan information signifies that between 70 and 130 MeteoBridge units are seen on-line at any given time, amplifying the chance of real-world exploitation regardless of the seller’s advisory cautioning in opposition to Web publicity.
Additional compounding the risk, the assault will be executed through a easy GET request, making it potential to craft malicious net hyperlinks or embed exploit code in seemingly innocuous components like
A sufferer merely must click on a hyperlink pointing to http://[target]/public/template.cgi?templatefile=$(command) to set off the exploit, enabling situations like distant code execution by way of social engineering.
ONEKEY demonstrated this with a proof-of-concept utilizing curl instructions, confirming that attackers can’t solely inject instructions but in addition retrieve their output within the HTTP response, offering instant suggestions on the success of their malicious actions.
This discovery highlights the facility of ONEKEY’s automated bash static evaluation, which flagged the difficulty throughout a routine scan of their firmware corpus.
In keeping with the Report, The proactive identification of this flaw, adopted by a structured disclosure timeline involving a number of notifications to Smartbedded (the seller) and coordination with the German BSI, showcases the significance of accountable vulnerability dealing with.
Regardless of preliminary challenges, together with the deletion of a discussion board submit and account by MeteoBridge directors, persistence paid off with the discharge of a patch on Might 14, 2025, as detailed within the vendor’s advisory.
For customers, upgrading to model 6.2 is vital, whereas organizations managing firmware should leverage automated instruments like ONEKEY’s platform to detect and mitigate such shell script vulnerabilities earlier than they grow to be exploitable threats within the wild.
This incident serves as a stark reminder of the hidden risks in IoT units and the necessity for steady safety vigilance.
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