The Jailbreakme.com Web site is using two separate vulnerabilities to bypass the iPhone s security mechanisms and enable users to run unapproved apps on their phones. One of the vulnerabilities is a memory-corruption flaw that affects the way that Apple s mobile devices, including the iPad and iPod Touch, display PDFs. The second weakness is a problem in the Apple iOS kernel that gives an attacker higher privileges once his code is on a targeted device, enabling him to break out of the iOS sandbox. Apple has not issued any guidance on workarounds or mitigations.
Source: https://threatpost.com/two-unpatched-flaws-show-apple-ios-080410/74296/