CVE-2023-7330: File Upload RCE

Description

Ruijie NBR series routers contain an unauthenticated arbitrary file upload vulnerability via /ddi/server/fileupload.php. The endpoint accepts attacker-supplied values in the name and uploadDir parameters and saves the provided multipart file content without adequate validation or sanitization of file type, path, or extension. A remote attacker can upload a crafted PHP file and then access it from the web root, resulting in arbitrary code execution in the context of the web service. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-14 UTC.

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Weakness Type (CWE)

CWE-434 Unrestricted Upload

References

Other References

https://cn-sec.com/archives/1995366.html https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/ruijie/ruijie-nbr-fileupload.yaml https://rfk0z.github.io/posts/Ruijie-NBR-router-fileupload-php-arbitrary-file-upload-vulnerability/ https://www.cnblogs.com/Domren/articles/19093295 https://www.vulncheck.com/advisories/ruijie-networks-nbr-routers-unauthenticated-arbitrary-file-upload-via-fileuploadphp

Frequently Asked Questions

What is CVE-2023-7330? +

Ruijie NBR series routers contain an unauthenticated arbitrary file upload vulnerability via /ddi/server/fileupload.php. The endpoint accepts attacker-supplied values in the name and uploadDir parameters and saves the provided multipart file content without adequate validation or sanitization of file type, path, or extension. A remote attacker can upload a crafted PHP file and then access it from the web root, resulting in arbitrary code execution in the context of the web service. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-14 UTC.

How do I check if I'm vulnerable to CVE-2023-7330? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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