Safari in Apple iPhone 1.1.1 allows remote user-assisted attackers to trick the iPhone user into making calls to arbitrary telephone numbers via a crafted "tel:" link that causes iPhone to display a different number than the number that will be dialed.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36856
http://www.vupen.com/english/advisories/2007/3287
http://www.securityfocus.com/bid/25854
http://securitytracker.com/id?1018752
http://secunia.com/advisories/26983
http://lists.apple.com/archives/security-announce/2007/Sep/msg00001.html