php -- input validation error in safe_mode

According to Maksymilian Arciemowicz research, it is possible to bypass security restrictions of safe_mode in various functions via directory traversal vulnerability. The attacker can use this attack to gain access to sensitive information. Functions utilizing expand_filepath() may be affected.

It should be noted that this vulnerability is not considered to be serious by the FreeBSD Security Team, since safe_mode and open_basedir are insecure by design and should not be relied upon.