Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Multiple directory traversal vulnerabilities in pfSense before 2.1.4 allow (1) remote attackers to read arbitrary .info files via a crafted path in the pkg parameter to pkg_mgr_install.php and allow (2) remote authenticated users to read arbitrary files via the downloadbackup parameter to system_firmware_restorefullbackup.php.
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.