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Re: NSE for detecting vulnerable PHP-CGI setups (CVE2012-1823)
From: Paulino Calderon <paulino () calderonpale com>
Date: Fri, 04 May 2012 15:54:37 -0500

On 04/05/2012 03:35 p.m., Patrik Karlsson wrote:


On Fri, May 4, 2012 at 9:25 PM, David Fifield <david () bamsoftware com <mailto:david () bamsoftware com>> wrote:

    On Fri, May 04, 2012 at 12:30:00PM -0500, Paulino Calderon wrote:
    > Hi list,
    >
    > Here is my script for detecting vulnerable PHP-CGI setups
    > (CVE2012-1823). This is a pretty scary vuln as it affects a lot of
    > installations. Here is the full advisory:
    > http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
    > I'm going to look more into it to write a reliable exploitation
    > script too. So far it seems the -r flag is not available in all the
    > setups and we will need to exploit via RFI to be 100% accurate.

    Nice, Paulino. Please commit this script.

    David Fifield
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Great work! Would attempting to match both the opening and closing tag improve detection?

//Patrik
--
Patrik Karlsson
http://www.cqure.net
http://twitter.com/nevdull77


Hi Patrik,
PHP coders sometimes don't use closing tags since they are optional. If we match closing tags in these files, the script will incorrectly report that a host is not vulnerable.
Check out:
http://php.net/manual/en/language.basic-syntax.instruction-separation.php
http://phpstarter.net/2009/01/omit-the-php-closing-tag/

Cheers!

--
Paulino Calderón Pale
Website: http://calderonpale.com
Twitter: http://twitter.com/calderpwn

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