source: https://www.securityfocus.com/bid/35425/info
Apple iPhone is prone to a security-bypass vulnerability that may cause a call to be placed automatically.
Successfully exploiting this issue may allow attackers to bypass the Mail's call-approval dialog and place a call automatically from a vulnerable device.
NOTE: This issue was previously covered in BID 35414 (Apple iPhone and iPod touch Prior to Version 3.0 Multiple Vulnerabilities), but has been assigned its own record to better document it.
iPhone Safari phone-auto-dial Exploit Demo by Collin Mulliner