The ruby handlers in the Magnatune component in Amarok do not properly quote text in certain contexts, probably including construction of an unzip command line, which allows attackers to execute arbitrary commands via shell metacharacters.
http://www.vupen.com/english/advisories/2007/0613
http://www.securityfocus.com/bid/22568
http://security.gentoo.org/glsa/glsa-200703-11.xml
http://secunia.com/advisories/24510
http://secunia.com/advisories/24159
http://secunia.com/advisories/23984
http://lists.suse.com/archive/suse-security-announce/2007-Jan/0015.html