Beware of Directory Traversal Vulnerability in m.static Web Framework

CVSScvssV3_1: 7.5

The m.static web framework, used by many websites to serve static files, contains a high severity Directory Traversal vulnerability.

Directory Traversal attacks (also known as path traversal) allow attackers to access files and directories that are otherwise not directly accessible to them. For example, in some situations an attacker could use a Directory Traversal flaw to retrieve sensitive files like passwords, log files or configuration files that are stored outside of the web server’s document root folder.

In the case of m.static, the vulnerability lies in the requestFile function which does not properly sanitize user-provided file paths. This could allow an attacker to craft a request for a file outside of the expected directory, such as ../../etc/passwd to retrieve the password file.

If you are using m.static on your website, you should update to the latest version immediately to patch this vulnerability. You should also review your server’s configuration to ensure sensitive files cannot be directly accessed.

To protect yourself, make sure any software or frameworks on your servers are always updated to the latest versions. Have a secure programming mindset and always sanitize untrusted user input that could impact file or directory access. Staying on top of security updates is key to avoiding exposure from software vulnerabilities.