Buffer overflow in the urarlib_get function in Christian Scheurer UniquE RAR File Library (unrarlib, aka URARFileLib) 0.4 allows context-dependent attackers to execute arbitrary code via a long (1) filename, (2) rarfile, or (3) libpassword argument.
http://www.vupen.com/english/advisories/2007/0961
http://www.securityfocus.com/bid/22942