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2003 Feb 17 12:00

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[vox] [Fwd: PHP Security Advisory: CGI vulnerability in PHP version4.3.0]
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[vox] [Fwd: PHP Security Advisory: CGI vulnerability in PHP version4.3.0]



For those of you using PHP 4.3.0, I thought this might be of interest to
you... (New release available: 4.3.1)


---------------------------- Original Message ----------------------------
Subject: PHP Security Advisory: CGI vulnerability in PHP version 4.3.0
From:    "Jani Taskinen" <sniper@php.net>
Date:    Mon, February 17, 2003 12:01 am
To:      php-announce@lists.php.net
         php-dev@lists.php.net
         php-general@lists.php.net
--------------------------------------------------------------------------
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Hash: SHA1


   PHP Security Advisory: CGI vulnerability in PHP version 4.3.0

Issued on: February 17, 2003
Software:  PHP/CGI version 4.3.0
Platforms: All


   The PHP Group has learned of a serious security vulnerability in  the
CGI SAPI of PHP version 4.3.0.


Description

   PHP contains code for preventing direct access to the CGI binary with
configure option "--enable-force-cgi-redirect" and php.ini option
"cgi.force_redirect". In PHP 4.3.0 there is a bug which renders these
options useless.

   NOTE: This bug does NOT affect any of the other SAPI modules.
         (such as the Apache or ISAPI modules, etc.)


Impact

   Anyone with access to websites hosted on a web server which employs 
the CGI module may exploit this vulnerability to gain access to any
file readable by the user under which the webserver runs.

   A remote attacker could also trick PHP into executing arbitrary PHP
code  if attacker is able to inject the code into files accessible by
the CGI.  This could be for example the web server access-logs.


Solution

   The PHP Group has released a new PHP version, 4.3.1, which incorporates
a fix for the vulnerability. All users of affected PHP versions are
encouraged to upgrade to this latest version. The downloads web site at

      http://www.php.net/downloads.php

   has the new 4.3.1 source tarballs, Windows binaries and source patch
from 4.3.0 available for download. You will only need to upgrade if 
you're using the CGI module of PHP 4.3.0. There are no other bugfixes
contained in this release.


Workaround

   None.


Credits

   The PHP Group would like to thank Kosmas Skiadopoulos for discovering 
this vulnerability.


Copyright (c) 2003 The PHP Group.


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