Difference between revisions of "Full Path Disclosure"

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==Description==
 
==Description==
  
Full Path Disclosure (AKA, FPD) vulnerabilities enable the attacker to see the path to the webroot/file.  Eg: /home/omg/htdocs/file/.  
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Full Path Disclosure (FPD) vulnerabilities enable the attacker to see the path to the webroot/file.  Eg: /home/omg/htdocs/file/.  
 
Certain vulnerabilities such as using the load_file() (within an SQL injection) query to view page sources require the attacker to have the full path to the file they wish to view.
 
Certain vulnerabilities such as using the load_file() (within an SQL injection) query to view page sources require the attacker to have the full path to the file they wish to view.
  

Revision as of 05:06, 12 September 2008

This is an Attack. To view all attacks, please see the Attack Category page.


Last revision: 09/12/2008


ASDR Table of Contents

Contents


Description

Full Path Disclosure (FPD) vulnerabilities enable the attacker to see the path to the webroot/file. Eg: /home/omg/htdocs/file/. Certain vulnerabilities such as using the load_file() (within an SQL injection) query to view page sources require the attacker to have the full path to the file they wish to view.

Risk Factors

TBD

Examples

  • Empty Array

If we have a site that uses a method of requesting a page like this:

http://site.com/index.php?page=about

We can use a method of opening and closing braces and causing the page to output an error. This method would look like this:

http://site.com/index.php?page[]=about

This renders the page defunct thus spitting out an error:

Warning: opendir(Array): failed to open dir: No such file or directory in /home/omg/htdocs/index.php on line 84
Warning: pg_num_rows(): supplied argument ... in /usr/home/example/html/pie/index.php on line 131
  • Null Session Cookie

Another popular and very reliable method of producing errors containing a FPD is to give the page a nulled session using Javascript Injections. A simple injection using this method would look something like so:

javascript:void(document.cookie="PHPSESSID=");

By simply setting the PHPSESSID cookie to nothing (null) we get an error.

Warning: session_start() [function.session-start]: The session id contains illegal characters, 
valid characters are a-z, A-Z, 0-9 and '-,' in /home/example/public_html/includes/functions.php on line 2


Related Threat Agents

Related Attacks


Related Vulnerabilities

  • None

Related Controls

This vulnerability is prevented simply by turning error reporting off so your code does not spit out errors.

error_reporting(0);


References