Sun Java System Identity Manager (IdM) 7.0 through 8.0 on Linux, AIX, Solaris, and HP-UX permits "control characters" in the passwords of user accounts, which allows remote attackers to execute arbitrary commands via vectors involving "resource adapters."
http://www.vupen.com/english/advisories/2009/0797
http://www.securityfocus.com/bid/34191
http://sunsolve.sun.com/search/document.do?assetkey=1-66-253267-1
http://sunsolve.sun.com/search/document.do?assetkey=1-21-140935-01-1
http://securitytracker.com/id?1021881
http://secunia.com/advisories/34380
http://blogs.sun.com/security/entry/sun_alert_253267_sun_java