CVE-2009-3890 Information

Description

Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6 when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename and then accessing this attachment via a direct request to a wp-content/uploads/ pathname as demonstrated by a .php.jpg filename.

Reference

http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0142.html http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0149.html http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0153.html http://core.trac.wordpress.org/ticket/11122 http://secunia.com/advisories/37332 http://wordpress.org/development/2009/11/wordpress-2-8-6-security-release/ http://www.openwall.com/lists/oss-security/2009/11/15/2 http://www.openwall.com/lists/oss-security/2009/11/15/3 http://www.openwall.com/lists/oss-security/2009/11/16/1 http://www.osvdb.org/59958