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Gentoo Linux Security Advisory                           GLSA 200410-04
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: PHP: Memory disclosure and arbitrary location file upload
      Date: October 06, 2004
      Bugs: #64223
        ID: 200410-04

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Synopsis
=======
Two bugs in PHP may allow the disclosure of portions of memory and
allow remote attackers to upload files to arbitrary locations.

Background
=========
PHP is a general-purpose scripting language widely used to develop
web-based applications. It can run inside a web server using the
mod_php module or the CGI version of PHP, or can run stand-alone in a
CLI.

Affected packages
================
    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  dev-php/php           < 4.3.9                           >= 4.3.9
  2  dev-php/mod_php       < 4.3.9                            >= 4.3.9
  3  dev-php/php-cgi       < 4.3.9                            >= 4.3.9
    -------------------------------------------------------------------
     3 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
==========
Stefano Di Paola discovered two bugs in PHP. The first is a parse error
in php_variables.c that could allow a remote attacker to view the
contents of the target machine's memory. Additionally, an array
processing error in the SAPI_POST_HANDLER_FUNC() function inside
rfc1867.c could lead to the $_FILES array being overwritten.

Impact
=====
A remote attacker could exploit the first vulnerability to view memory
contents. On a server with a script that provides file uploads, an
attacker could exploit the second vulnerability to upload files to an
arbitrary location. On systems where the HTTP server is allowed to
write in a HTTP-accessible location, this could lead to remote
execution of arbitrary commands with the rights of the HTTP server.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All PHP, mod_php and php-cgi users should upgrade to the latest stable
version:

    # emerge sync

    # emerge -pv ">=dev-php/php-4.3.9"
    # emerge ">=dev-php/php-4.3.9"

    # emerge -pv ">=dev-php/mod_php-4.3.9"
    # emerge ">=dev-php/mod_php-4.3.9"

    # emerge -pv ">=dev-php/php-cgi-4.3.9"
    # emerge ">=dev-php/php-cgi-4.3.9"

References
=========
  [ 1 ] Secunia Advisory
        https://www.flexera.com/products/software-vulnerability-research/secunia-research
  [ 2 ] BugTraq post regarding the php_variables.c issue
          [ 3 ] BugTraq post regarding the rfc1867.c issue
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200410-04

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org/.

License
======
Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/1.0/
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