CyberRota Analysis
AI-GeneratedThe file-upload component of Malcolm, a network traffic analysis tool, is vulnerable due to an improperly configured allow-list that permits any file type to be uploaded, including PHP scripts. This flaw allows authenticated users with the `ROLE_UPLOAD` permission to execute arbitrary PHP code on the server as the `www-data` user, potentially leading to unauthorized access or control over the system. Organizations using Malcolm prior to version 26.06.1 should prioritize patching this vulnerability to mitigate the risk of code execution attacks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (`file-upload/php/config.php:16`), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the `.php` extension intact. Committed files land in `/var/www/upload/server/php/files` (`file-upload/php/config.php:7`), and the component's nginx routes any URL ending in `.php` to php-fpm. An authenticated `GET /server/php/files/<name>.php` then executes the uploaded code as `www-data`. Prior to version 26.06.1, in RBAC mode, the upload endpoint is reachable by the granular `ROLE_UPLOAD` role (`nginx/lua/nginx_auth_helpers.lua:71`), a role intended only for submitting capture files. As a result, a user holding the upload-only role runs arbitrary PHP as `www-data` inside the file-upload container. Version 26.06.1 fixes the issue.