PHP php-cgi Query String Parameter Parsing Exploit Attempt

I currently have a Web/FTP server that is running Windows 2008R2 standard that is getting monitored for ISP traffic and currently they are seeing

'50744 VID43969 PHP php-cgi Query String Parameter Parsing Exploit Attempt Inbound (CVE-2012-1823)' they are saying that one or more external hosts are attempting to discover whether one of your Internet-facing devices is vulnerable to either the PHP-CGI argument injection (CVE-2012-1823) or the PHP-CGI improper handling of query strings (CVE-2012-2311) vulnerabilities. Successful exploitation of these vulnerabilities may result in information disclosure or remote code execution.
I am not sure what this means and how to protect the system.
ahmad1467Asked:
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Ray PaseurCommented:
These vulnerabilties are quite old.  Some background, so you can make your own tests:
http://www.cvedetails.com/cve/CVE-2012-1823
http://www.cvedetails.com/cve/CVE-2012-2311

At current levels of PHP there appears to be little risk:
http://www.cvedetails.com/vulnerability-list/vendor_id-74/product_id-128/version_id-125891/PHP-PHP-5.4.2.html
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