A new feature found in iPhone OS 3.0 has also created a new security liability, according to a security group member. The exploit is caused by the OS’ automatic opening of Safari when attempting to connect to a network. Remote-exploit.org co-founder Max Moser explains that when the iPhone joins a network, it tries to run a DNS query for apple.com, and open a simple HTML document stored on Apple’s website. If these two things happen without…