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Gentoo Linux Security Advisory GLSA 200410-04
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http://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
http://secunia.com/advisories/12560/
[ 2 ] BugTraq post regarding the php_variables.c issue
http://www.securityfocus.com/archive/1/375294
[ 3 ] BugTraq post regarding the rfc1867.c issue
http://www.securityfocus.com/archive/1/375370
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200410-04.xml
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
http://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.
http://creativecommons.org/licenses/by-sa/1.0
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