Mail in Apple Mac OS X Leopard (10.5.1) allows user-assisted remote attackers to execute arbitrary code via an AppleDouble attachment containing an apparently-safe file type and script in a resource fork, which does not warn the user that a separate program is going to be executed. NOTE: this is a regression error related to CVE-2006-0395.
http://www.vupen.com/english/advisories/2007/4238
http://www.vupen.com/english/advisories/2007/3958
http://www.us-cert.gov/cas/techalerts/TA07-352A.html
http://www.kb.cert.org/vuls/id/433819
http://www.heise-security.co.uk/news/99257
http://securitytracker.com/id?1019106
http://secunia.com/advisories/28136
http://secunia.com/advisories/27785
http://lists.apple.com/archives/security-announce/2007/Dec/msg00002.html