Unspecified vulnerability in Apple Safari on Mac OS X 10.5.6 allows remote attackers to execute arbitrary code via unknown vectors triggered by clicking on a link, as demonstrated by Charlie Miller during a PWN2OWN competition at CanSecWest 2009.
https://exchange.xforce.ibmcloud.com/vulnerabilities/49463
http://www.securitytracker.com/id?1021879
http://www.securityfocus.com/bid/34179
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9129978
http://news.cnet.com/8301-1009_3-10199652-83.html