bugtraq - Re: [Full-disclosure] PHP import_request_variables() arbitrary variable overwrite

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Date: Sat, 10 Mar 2007 15:17:38 +0100
From: Stefan Esser <sesser@...dened-php.net>
To: Stefano Di Paola <stefano.dipaola@...ec.it>
Cc: FD <full-disclosure@...ts.grok.org.uk>,
	phpsec <security@....net>, bugtraq@...urityfocus.com
Subject: Re: [Full-disclosure] PHP import_request_variables() arbitrary variable
 overwrite

Hello,

> PHP import_request_variables() arbitrary variable overwrite
>  Date              20060307
>   
I believe all dates in the advisory contain the wrong year...

> III. ANALYSIS
>
> import_request_variables() is not new to vulnerabilities: consider this
> change log entry for 24 Nov 2005, PHP 5.1.
>
> [quote]
> - Fixed potential GLOBALS overwrite via import_request_variables() and
>   possible crash and/or memory corruption. (Ilia)
> [/quote]
>   
Taking into account that the vulnerability you describe is fixed in
Hardened-PHP for years and that there is also a protection against this
in the Suhosin Extension you can be sure that this NOT a new
vulnerability (and that you are not the first one who found it...)

For the record, the same vulnerability was reported by me on the
23.10.2004 at 22:05 in a mail to security@....net (before I added the
protection to Hardened-PHP)
At that time the PHP developers considered it NOT A VULNERABILITY.

Well now the PHP developers have commited a fix for this to the PHP CVS,
crediting you instead of the original reporter (me) and as usual the fix
is only fixing a part of the problem.
(Hint: long names like HTTP_POST_VARS do exist...)

Stefan Esser
Hardened-PHP Project