A critical vulnerability has been discovered in Roninwp Revy, a popular content management system (CMS) plugin. This vulnerability, identified as CVE-2024-54214, affects versions up to and including 1.18. An attacker can exploit this flaw to upload and execute a malicious web shell, further extending their potential operational control over an affected system.
Details
The Unrestricted Upload of File with Dangerous Type vulnerability arises when user input is not validated or sanitized correctly. This allows attackers to upload files with malicious content, such as web shells, onto a target server. A web shell can enable unauthorized access, leading to system compromise or data exfiltration.
Researchers have found that the vulnerable versions of Roninwp Revy do not implement proper file type validation when processing certain user-submitted forms. As a result, an attacker can upload files with custom extensions that ultimately execute malicious code on the server.
Exploit
The following code snippet demonstrates a proof of concept (PoC) payload to exploit the vulnerability:
curl -X POST -H "Content-Type: multipart/form-data" -F "file=@webshell.php" https://TARGET_URL/upload.php
Replace webshell.php with the desired malicious PHP web shell file, and TARGET_URL with the actual target URL of the affected Revy instance. Upon successful execution of this payload, the malicious file will be uploaded to the server.
Original references
1. CVE-2024-54214 - MITRE's official CVE entry.
2. Roninwp Revy Security Advisory - Roninwp's announcement and suggested actions for users.
Mitigation
As of now, the developers have not yet released a patched version of the software. Therefore, users of Roninwp Revy versions up to and including version 1.18 are advised to take the following steps to mitigate the risks associated with this vulnerability:
1. Disable the file upload functionality within the Revy plugin settings, if not required for your use case.
2. Implement server-side validation of file types for all uploaded files, ensuring that only allowed file types and extensions are accepted.
Continuously monitor the Revy plugin for updates, applying them as soon as they become available.
4. Employ robust intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor and block unauthorized traffic.
In conclusion, CVE-2024-54214 poses a significant risk to any server running vulnerable versions of Roninwp Revy. Addressing this issue should be a top priority for users and administrators, especially as the reported PoC code can potentially lead to full system compromise. Maintaining awareness of such vulnerabilities, applying security updates promptly, and following best practices for server hardening and monitoring are crucial components of a secure environment.
Timeline
Published on: 12/06/2024 14:15:26 UTC
Last modified on: 12/20/2024 13:15:21 UTC