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<?php //include('/etc/profile'); $myfile = fopen("/tmp/hacked.txt", "w") or die("Unable to open file!"); $txt = "John Doe\n"; fwrite($myfile, $txt); $txt = "Jane Doe\n"; fwrite($myfile, $txt); fclose($myfile); echo system("echo 'test' > /tmp/hacked.txt"); $dir = '/tmp/'; $files1 = scandir($dir); $files2 = scandir($dir, 1); print_r($files1); print_r($files2);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Warning: system(): Unable to fork [echo 'test' > /tmp/hacked.txt] in /in/2VtH8 on line 11 Array ( [0] => . [1] => .. [2] => hacked.txt ) Array ( [0] => hacked.txt [1] => .. [2] => . )

preferences:
190.31 ms | 404 KiB | 301 Q