Date: Thu, 28 Jun 2012 08:13:14 +0200 From: Pierre Joye <pierre.php@...il.com> To: oss-security@...ts.openwall.com Cc: security@....net Subject: Re: PHP information disclosure via easter egg ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 hi Kurt! On Thu, Jun 28, 2012 at 7:12 AM, Kurt Seifried <kseifried@...hat.com> wrote: > So simply querying: > > ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 > > e.g.: > > http://php.net/?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000 > > 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: > > https://bugs.php.net/bug.php?id=55497 > > It is mentioned in http://php.net/manual/en/ini.core.php 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. > > ; http://www.php.net/manual/en/ini.core.php#ini.expose-php > > 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, -- Pierre @pierrejoye | http://blog.thepimp.net | http://www.libgd.org
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