dedecms变量覆盖漏洞导致注入漏洞防御方法

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dedecms变量覆盖漏洞导致注入漏洞防御方法缩略图

防御方法

/include/filter.inc.php

/**
* 过滤不相关内容
*
* @access public
* @param string $fk 过滤键
* @param string $svar 过滤值
* @return string
*/
$magic_quotes_gpc = ini_get(‘magic_quotes_gpc’);
function _FilterAll($fk, &$svar)
{
global $cfg_notallowstr,$cfg_replacestr;
if( is_array($svar) )
{
foreach($svar as $_k => $_v)
{
$svar[$_k] = _FilterAll($fk,$_v);
}
}
else
{
if($cfg_notallowstr!=” && preg_match(“#”.$cfg_notallowstr.”#i”, $svar))
{
ShowMsg(” $fk has not allow words!”,’-1′);
exit();
}
if($cfg_replacestr!=”)
{
$svar = preg_replace(‘/’.$cfg_replacestr.’/i’, “***”, $svar);
}
}
if (!$magic_quotes_gpc) {
$svar = addslashes($svar);
}
return addslashes($svar);
// return $svar;
}

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