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Which is an example of local file inclusion?
Local File Inclusion (LFI) is a type of vulnerability concerning web server. It allow an attacker to include a local file on the web server. It occurs due to the use of not properly sanitized user input. I’ll give some examples in PHP but it can also occurs in Perl, ASP, JSP, or whatever.
Is it possible to get RCE from a LFI?
It is sometimes possible to get RCE via an LFI without being able to directly control a file on disk, use an RFI, use expect or use a stream. When an error occurs, in say a LAMP stack – the full request is going to be logged into the servers “error log” file.
Can you use include ( ) in dynamic RCE?
You can’t use include () to leverage LFI into dynamic RCE. You would have to already have a file with code in it (i.e., evil-RCE-code.php) on the system to call. For example:
What does evil RCE code in PHP do?
The file “evil-RCE-code.php” may contain, for example, the phpinfo () function which is useful for gaining information about the configuration of the environment in which the web service runs. An attacker can ask the application to execute his PHP code using the following request:
Can a PHP file be injected into an Apache log file?
Also PHP will argue and would not allow to use it if allow_url_include=off which results in a full path disclosure. There are other possibilities how code can be injected and later evaluated; via apache log files, using “/proc” and others.
Why does the script force to use.php file extension?
Here the script force to use .php file extension, but an attacker, by adding a null byte the the path, can drop the extension. Why? %00 is the http encoded version of 0x00 in hex.
Can a LFI file be converted to RCE?
LFI can easily be converted to remote code execution (RCE) in one way more. This new data protocol has appeared in PHP 5.2.0 and in older versions will not work. Also PHP will argue and would not allow to use it if allow_url_include=off which results in a full path disclosure.