GLSA 200410-04: PHP: Memory disclosure and arbitrary location file upload

http://security.gentoo.org/

Severity:	normal
Title:	PHP: Memory disclosure and arbitrary location file upload
Date:	10/06/2004
Bugs:	#64223
ID:	200410-04

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	Architecture(s)
dev-php/php	< 4.3.9	>= 4.3.9	All supported architectures
dev-php/mod_php	< 4.3.9	>= 4.3.9	All supported architectures
dev-php/php-cgi	< 4.3.9	>= 4.3.9	All 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

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 https://bugs.gentoo.org.