DEDECMS 5.6最新Get Shell漏洞 DEDECMS 5.3/5.6

　　
class Archives
{
................
function __construct($aid)
{
............
if($this->ChannelUnit->ChannelInfos['addtable']!='')
{
$query = "SELECT * FROM `{$this->ChannelUnit->ChannelInfos['addtable']}` WHERE `aid` = '$aid'";
$this->addTableRow = $this->dsql->GetOne($query);
}
........................
if($this->ChannelUnit->ChannelInfos['addtable']!='' && $this->ChannelUnit->ChannelInfos['issystem']!=-1)
{
if(is_array($this->addTableRow))
{
...............................
$this->Fields['templet'] = $this->addTableRow['templet'];//注意1
......................................
}
}
.............................
}
function MakeHtml($isremote=0)
{
global $cfg_remote_site,$fileFirst;
if($this->IsError)
{
return '';
}
$this->Fields["displaytype"] = "st";
//预编译$th
$this->LoadTemplet(); //触发1
......................................//省略部份代码
$this->arseDMFields($i,1);
$this->dtp->SaveTo($truefilename); //触发2
......................................
}
继续跟(触发1)$this->LoadTemplet(); //arc.archives.class.php有定义
function LoadTemplet()
{
if($this->TempSource=='')
{
$tempfile = $this->GetTempletFile(); //注意2
if(!file_exists($tempfile) || !is_file($tempfile))
{
echo "文档ID：{$this->Fields['id']} - {$this->TypeLink->TypeInfos['typename']} - {$this->Fields['title']}
";
echo "模板文件不存在，无法解析文档！";
exit();
}
$this->dtp->LoadTemplate($tempfile); //触发3
$this->TempSource = $this->dtp->SourceString;
}
else
{
$this->dtp->LoadSource($this->TempSource);
}
}
看注意2 的$this->GetTempletFile() //arc.archives.class.php有定义
function GetTempletFile()
{
global $cfg_basedir,$cfg_templets_dir,$cfg_df_style;
$cid = $this->ChannelUnit->ChannelInfos['nid'];
if(!emptyempty($this->Fields['templet'])) //注意3
{
$filetag = MfTemplet($this->Fields['templet']);
if( !ereg('/', $filetag) ) $filetag = $GLOBALS['cfg_df_style'].'/'.$filetag;
}
else
{
$filetag = MfTemplet($this->TypeLink->TypeInfos["temparticle"]);
}
.......................................
if($cid=='spec')
{
if( !emptyempty($this->Fields['templet']) )
{
$tmpfile = $cfg_basedir.$cfg_templets_dir.'/'.$filetag;
}
else
{
$tmpfile = $cfg_basedir.$cfg_templets_dir."/{$cfg_df_style}/article_spec.htm";
}
}
...........................................
return $tmpfile;
}