Rule: 

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Sid: 
100000128

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Summary: 
This event is generated when an attempt is made to link to an external script 
as part of the Stadtaus.com PHP Form Mail program.

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Impact: 
The script being included will be run in the same security context as the 
vulnerable program, enabling a variety of web-based attacks.

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Detailed Information:
The Stadtaus.com PHP Form Mail system's download_center_lite.inc.php module, 
when including other scripts by way of its script_root parameter, fails to 
validate the location of these scripts, and thus allows attackers to include 
any malicious script anywhere on the web. The included script will be executed 
with the same permissions and in the same security context at the vulnerable 
program itself, thus allowing a range of attacks.

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Affected Systems:
Stadtaus.com PHP Form Mail Script 2.3

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Attack Scenarios: 
This vulnerability may be exploited with a web browser or a script.

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Ease of Attack: 
Simple, as it can be exploited using a web browser.

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False Positives:
None Known.

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False Negatives:
None Known.

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Corrective Action: 
Currently, there are no vendor-supplied patches or workarounds. However, if it 
is possible to globally disable PHP's 'allow_url_fopen' and 'register_globals' 
directives in your environment, doing so may disable this vulnerability. 
However, turning off these directives should be tested in a non-production 
environment, in case doing so breaks other scripts on your system.

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Contributors: 
Alex Kirk <alex.kirk@sourcefire.com>

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Additional References:

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