GHSA-j3v8-v77f-fvgm Grav Server-side Template Injection (SSTI) via Denylist Bypass Vulnerability

• Packagist getgrav/grav: < 1.7.42 → fixed in 1.7.42

Hi, actually we have sent the bug report to [email protected] on 27th March 2023 and on 10th April 2023. Grav Server-side Template Injection (SSTI) via Denylist Bypass Vulnerability Summary: | Product | Grav CMS | | ----------------------- | --------------------------------------------- | | Vendor | Grav | | Severity | High - Users with login access to Grav Admin panel and page creation/update permissions are able to obtain remote code/command execution | | Affected Versions | 0, 'array_diff_uassoc' => -1, 'array_diff_ukey' => -1, 'array_filter' => 1, 'array_intersect_uassoc' => -1, 'array_intersect_ukey' => -1, 'array_map' => 0, 'array_reduce' => 1, 'array_udiff_assoc' => -1, 'array_udiff_uassoc' => [-1, -2], 'array_udiff' => -1, 'array_uintersect_assoc' => -1, 'array_uintersect_uassoc' => [-1, -2], 'array_uintersect' => -1, 'array_walk_recursive' => 1, 'array_walk' => 1, 'assert_options' => 1, 'uasort' => 1, 'uksort' => 1, 'usort' => 1, 'preg_replace_callback' => 1, 'spl_autoload_register' => 0, 'iterator_apply' => 1, 'call_user_func' => 0, 'call_user_func_array' => 0, 'register_shutdown_function' => 0, 'register_tick_function' => 0, 'set_error_handler' => 0, 'set_exception_handler' => 0, 'session_set_save_handler' => [0, 1, 2, 3, 4, 5], 'sqlite_create_aggregate' => [2, 3], 'sqlite_create_function' => 2, ]; static $informationDiscosureFunctions = [ 'phpinfo', 'posix_mkfifo', 'posix_getlogin', 'posix_ttyname', 'getenv', 'get_current_user', 'proc_get_status', 'get_cfg_var', 'disk_free_space', 'disk_total_space', 'diskfreespace', 'getcwd', 'getlastmo', 'getmygid', 'getmyinode', 'getmypid', 'getmyuid' ]; static $otherFunctions = [ 'extract', 'parse_str', 'putenv', 'ini_set', 'mail', 'header', 'proc_nice', 'proc_terminate', 'proc_close', 'pfsockopen', 'fsockopen', 'apache_child_terminate', 'posix_kill', 'posix_mkfifo', 'posix_setpgid', 'posix_setsid', 'posix_setuid', ]; if (in_array($name, $commandExecutionFunctions)) { return true; } if (in_array($name, $codeExecutionFunctions)) { return true; } if (isset($callbackFunctions[$name])) { return true; } if (in_array($name, $informationDiscosureFunctions)) { return true; } if (in_array($name, $otherFunctions)) { return true; } return static::isFilesystemFunction($name); } /** • @param string $name • @return bool */ public static function isFilesystemFunction(string $name): bool { static $fileWriteFunctions = [ 'fopen', 'tmpfile', 'bzopen', 'gzopen', // write to filesystem (partially in combination with reading) 'chgrp', 'chmod', 'chown', 'copy', 'file_put_contents', 'lchgrp', 'lchown', 'link', 'mkdir', 'move_uploaded_file', 'rename', 'rmdir', 'symlink', 'tempnam', 'touch', 'unlink', 'imagepng', 'imagewbmp', 'image2wbmp', 'imagejpeg', 'imagexbm', 'imagegif', 'imagegd', 'imagegd2', 'iptcembed', 'ftp_get', 'ftp_nb_get', ]; static $fileContentFunctions = [ 'file_get_contents', 'file', 'filegroup', 'fileinode', 'fileowner', 'fileperms', 'glob', 'is…