How the exploit works
The exploit is delivered via a malicious web page opened in the Safari browser on the iPhone. There are several delivery vectors that an attacker might utilize to get a victim to open such a web page. For example:
* An attacker controlled wireless access point: Because the iPhone learns access points by name (SSID), if a user ever gets near an attacker-controlled access point with the same name (and encryption type) as an access point previously trusted by the user, the iPhone will automatically use the malicious access point. This allows the attacker to add the exploit to any web page browsed by the user by replacing the requested page with a page containing the exploit.
* A misconfigured forum website: If a web forum's software is not configured to prevent users from including potentially dangerous data in their posts, an attacker could cause the exploit to run in any iPhone browser that viewed the thread. (This would require some slight changes in our proof of concept exploit, however.)
* A link delivered via e-mail or SMS: If an attacker can trick a user into opening a website that the attacker controls, the attacker can easily embed the exploit into the main page of the website.