Drupal 4.6.x before 4.6.7 and 4.7.0, when running on Apache with mod_mime, does not properly handle files with multiple extensions, which allows remote attackers to upload, modify, or execute arbitrary files in the files directory.
https://www.exploit-db.com/exploits/1821
https://exchange.xforce.ibmcloud.com/vulnerabilities/26655
http://www.vupen.com/english/advisories/2006/1975
http://www.securityfocus.com/bid/18245
http://www.securityfocus.com/archive/1/435794/100/0/threaded
http://www.debian.org/security/2006/dsa-1125
http://secunia.com/advisories/21244