Novell Challenge Response Client (LCM) 2.7.5 and earlier, as used with Novell Client for Windows 4.91 SP4, allows users with physical access to a locked system to obtain contents of the clipboard by pasting the contents into the Challenge Question field.
https://secure-support.novell.com/KanisaPlatform/Publishing/686/3726376_f.SAL_Public.html
http://www.vupen.com/english/advisories/2008/0423/references
http://www.securitytracker.com/id?1019304