Dock in Apple Mac OS X 10.5 before 10.5.4, when Exposé hot corners is enabled, allows physically proximate attackers to gain access to a locked session in (1) sleep mode or (2) screen saver mode via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43497
http://www.vupen.com/english/advisories/2008/1981/references
http://www.securityfocus.com/bid/30018
http://support.apple.com/kb/HT2163
http://securitytracker.com/id?1020395
http://secunia.com/advisories/30802
http://lists.apple.com/archives/security-announce/2008//Jun/msg00002.html