According to i0n1c, a well-known member of the iOS jailbreaking community, users should not expect to see an untethered jailbreak for the just-released iOS 4.3.4 anytime soon.
For those who are not yet aware, yesterday, Apple released iOS 4.3.4 after weeks of speculation, to fix a vulnerability in Mobile Safari that allowed users to apply JailbreakMe 3.0, an untethered jailbreak for iOS 4.3.3 and under that can be performed within a few minutes. Now that the best jailbreaking method seems to be gone, at least for the foreseeable future, many are wondering what the future holds for untethered jailbreaks for 4.3.4: according to a prominent developer of jailbreaking tools, not much.
In a way it is nice to see that Apple instead of merely fixing vulns add more mitigation checks. But for jailbreakers this suxx.
Don’t expect a iOS 4.3.4 untether anytime soon.
In short, we advise users who haven’t upgraded to iOS 4.3.4 already to avoid doing it, it might just not be worth the risk, and install PDF Patcher 2 to fix the Safari’s PDF exploit If you’re already using the newest firmware, we hope you’ve backed up your SHSH blobs. Until iOS 5 comes out, there might be no point in installing iOS 4.3.4 at all.
JailbreakMe 3.0, released a few weeks ago, is an easy jailbreaking tool that takes advantage of a PDF exploit in Mobile Safari. Unlike other tools that require a computer connection and a moderate amount of skills, JailbreakMe simply requires users to point their browsers to JailbreakMe.com: within minutes, any iPod touch, iPhone and iPad, including the iPad 2, will be unlocked. If you’re planning to jailbreak your device using JailbreakMe 3.0, check out our write-up.
Even if a new untethered vulnerability is found in iOS 4.3.4, it might be unwise to exploit it just yet, since Apple might then patch in the upcoming iOS 5. Instead, it would be smarter if the developers kept their findings secret in order to come out with a jailbreak for the next iOS quickly. For now, you can jailbreak iOS 4.3.4 using Redsn0w, or PwnageTool (iPhone, iPad, iPod touch), although it’s not an untethered solution, which means that you’ll have to plug your device into your computer every time you power it on, in order to boot it into a jailbroken state.