CVE-2024-42467
CriticalCVSS 10.0Exploitation Probability (EPSS)
Elevated risk61th percentile - higher than 61% of all known CVEs
Summary
The CometVisu add-on for openHAB has a vulnerability where the proxy endpoint can be accessed without authentication, enabling SSRF and XSS attacks. An attacker can exploit the proxy to send GET requests to internal servers or return malicious JavaScript code that executes in the context of the CometVisu UI. This may lead to Remote Code Execution (RCE) when chained with other vulnerabilities.
Risk Assessment
An attacker can access internal network resources or execute malicious code in the admin's browser, potentially leading to compromise of the openHAB server.
Recommendation
Update the CometVisu add-on to version 4.2.1 or later. Restrict access to openHAB to trusted networks.
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Original NVD description (English source)
openHAB, a provider of open-source home automation software, has add-ons including the visualization add-on CometVisu. In versions 3.4.0.M4 through 4.2.0,, the proxy endpoint of openHAB's CometVisu add-on can be accessed without authentication. This proxy-feature can be exploited as Server-Side Request Forgery (SSRF) to induce GET HTTP requests to internal-only servers, in case openHAB is exposed in a non-private network. Furthermore, this proxy-feature can also be exploited as a Cross-Site Scripting (XSS) vulnerability, as an attacker is able to re-route a request to their server and return a page with malicious JavaScript code. Since the browser receives this data directly from the openHAB CometVisu UI, this JavaScript code will be executed with the origin of the CometVisu UI. This allows an attacker to exploit call endpoints on an openHAB server even if the openHAB server is located in a private network. (e.g. by sending an openHAB admin a link that proxies malicious JavaScript.) This issue may lead up to Remote Code Execution (RCE) when chained with other vulnerabilities. Users should upgrade to version 4.2.1 of the CometVisu add-on of openHAB to receive a patch.

