directory traversal in RaidenHTTPD 1.1.27

["Donato Ferrante" <fdonato@xxxxxxxxxxxxx>]

                           Donato Ferrante


Application:  RaidenHTTPD
              http://www.raidenhttpd.com/

Version:      1.1.27

Bug:          directory traversal

Date:         05-Feb-2005

Author:       Donato Ferrante
              e-mail: fdonato@xxxxxxxxxxxxx
              web:    www.autistici.org/fdonato



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1. Description
2. The bug
3. The code
4. The fix



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1. Description:
----------------

Vendor's Description:

"RaidenHTTPD is a full featured web server software for Windows 98/Me/
2000/XP/2003 platforms."



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2. The bug:
------------

The program by default has some checks to avoid malicious patterns
like "/../" into http requests, but the program doesn't well manage
the initial "/" into requests. In fact if you send a request like:

> GET /somefile HTTP/1.1

the webserver will return the requested file if available in the
DocumentRoot directory.


But if you send a request like:

> GET somefile HTTP/1.1

the webserver will return the requested file if available in the
disk partition where the httpd is installed.



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3. The code:
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To test the vulnerability, send a raw http request to the server like:

GET windows/system.ini HTTP/1.1
Host: localhost


this will display Windows' system.ini, if the http server is installed
on the same partition of Windows.



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4. The fix:
------------

Vendor was contacted.
Bug fixed in the version 1.1.31.



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