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Date: Thu, 28 Jun 2012 19:40:35 +0200
From: "Oden Eriksson" <>
Subject: Re: PHP information disclosure via easter egg

> Hash: SHA1
> On 06/28/2012 12:13 AM, Pierre Joye wrote:
>> hi Kurt!
>> On Thu, Jun 28, 2012 at 7:12 AM, Kurt Seifried
>> <> wrote:
>>> So simply querying:
>>> ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000
>>> e.g.:
>>> shows authors, SAPI modules (and their authors) and normal
>>> modules (and their authors), resulting in a significant
>>> information disclosure (version #'s can be narrowed down from the
>>> authors list).
>>> This has already been reported, but no CVE was assigned:
>>> It is mentioned in however
>>> it is enabled by default:
>>> ; Decides whether PHP may expose the fact that it is installed on
>>> the server ; (e.g. by adding its signature to the Web server
>>> header).  It is no security ; threat in any way, but it makes it
>>> possible to determine whether you use PHP ; on your server or
>>> not.
>>> ;
>>> expose_php = On
>> Why would it require a CVE and why is it seen as a security issue?
>> Sure it could be, like unfiltered input and the like but...
>> Cheers,
> I wasn't asking for a CVE for this issue (no "CVE Request: in
> subject), This is more of a place holder/information (oss-security is
> read by a lot of security vendors/etc, and is for more than just CVE
> assignments) and to make sure people are aware of the issue, since I
> wasn't even aware of it until someone pointed it out to me.
> Exposing the fact that I am running PHP is one thing. Exposing exactly
> which modules I have loaded is quite another.

That url does not show loaded modules. One can also use for example:

disable_functions = phpinfo

in /etc/php.ini

So, I guess that's sufficent.

Regards // Oden Eriksson
Security team manager - Mandriva

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