oss-security - PHP information disclosure via easter egg ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000

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Date: Wed, 27 Jun 2012 23:12:52 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>,
        security@....net
Subject: PHP information disclosure via easter egg ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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



- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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