first commit

dvwa/vulnerabilities/exec/source/impossible.php

@@ -0,0 +1,41 @@
+<?php
+
+if( isset( $_POST[ 'Submit' ]  ) ) {
+	// Check Anti-CSRF token
+	checkToken( $_REQUEST[ 'user_token' ], $_SESSION[ 'session_token' ], 'index.php' );
+
+	// Get input
+	$target = $_REQUEST[ 'ip' ];
+	$target = stripslashes( $target );
+
+	// Split the IP into 4 octects
+	$octet = explode( ".", $target );
+
+	// Check IF each octet is an integer
+	if( ( is_numeric( $octet[0] ) ) && ( is_numeric( $octet[1] ) ) && ( is_numeric( $octet[2] ) ) && ( is_numeric( $octet[3] ) ) && ( sizeof( $octet ) == 4 ) ) {
+		// If all 4 octets are int's put the IP back together.
+		$target = $octet[0] . '.' . $octet[1] . '.' . $octet[2] . '.' . $octet[3];
+
+		// Determine OS and execute the ping command.
+		if( stristr( php_uname( 's' ), 'Windows NT' ) ) {
+			// Windows
+			$cmd = shell_exec( 'ping  ' . $target );
+		}
+		else {
+			// *nix
+			$cmd = shell_exec( 'ping  -c 4 ' . $target );
+		}
+
+		// Feedback for the end user
+		$html .= "<pre>{$cmd}</pre>";
+	}
+	else {
+		// Ops. Let the user name theres a mistake
+		$html .= '<pre>ERROR: You have entered an invalid IP.</pre>';
+	}
+}
+
+// Generate Anti-CSRF token
+generateSessionToken();
+
+?>