WWDC 2011 is winding down to a close, and developers of jailbroken apps for Cydia are probably itching to get started on all the iOS 5 goodness.  It seems like a good time to release the tethered redsn0w jailbreak for iOS 5. The following devices are supported:

• iPod touch 3G
• iPod touch 4G
• iPad 1
• iPhone3GS
• iPhone4 (GSM)
• iPhone4 (CDMA)

UNLOCKERS AND THOSE PRESERVING THEIR UNLOCKABLE BASEBANDS SHOULD STAY FAR AWAY FROM THIS!  You will very likely lose your unlockable baseband if you try to install iOS 5.


THIS JAILBREAK IS INTENDED ONLY FOR DEVELOPERS OF JAILBROKEN APPS!  There are just too many broken components (Apple’s official apps, 3rd-party App Store apps, Cydia apps, MobileSubstrate apps, etc) for this to be useful to anyone but those truly looking to fix bugs in their iOS 5 jailbroken apps.  (Seriously!)

THIS REDSN0W WILL NOT HACTIVATE!  You need to be an iOS developer with a registered UDID to get past all the new activation screens.  PLEASE DON’T PIRATE APPLE SOFTWARE!  Only registered devs with Macs can develop iOS applications, and only those people will have legitimate access to the beta IPSWs. See update #1 below.

THIS IS A TETHERED JAILBREAK ONLY!  No new exploits are being exposed with this jailbreak (it uses geohot’s limera1n bootrom exploit), but that comes at a cost.  You will need to use redsn0w to “Just boot tethered now”  to be able to use many things, including Cydia and Safari.  If you see a white icon for Cydia, or if Cydia or Safari crash when you open them, it’s because you didn’t boot tethered.

IF YOU HAVE THE 06.15 BASEBAND ON YOUR 3GS…this redsn0w will get you past the iTunes restore error you’ll get when using the stock IPSW (nobody other than those with the 06.15 baseband should be going anywhere near the stock IPSW!).
The way redsn0w works, you will very likely be able to use this on upcoming iOS5 betas, just by continuing to point redsn0w at the 5.0b1 5.0b4 IPSW.  So keep that IPSW handy!
Although most people just launch redsn0w by double-clicking it, remember there are “advanced” options available to those who invoke it from the Terminal shell:

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Update #1: Since Apple now provides Windows iTunes 10.5 for iOS5 and iCloud developers, it’s no longer the case that only Mac owners can legitimately activate their devices.  We now provide a Windows version of redsn0w for those developers (only!).

Update #2: We’ve updated redsn0w to account for the sandbox changes that affected App Store apps in 5.0b3 (and it now recognizes the IPSWs for all three betas so far).  If you already jailbroke 5.0b3 using the previous redsn0w, you don’t need to re-jailbreak…just use this updated version to boot tethered.  Point redsn0w b3 at the b3 IPSW when jailbreaking iOS5b3.

Update #3: For the convenience of kernel hackers like @comex and @i0n1c, we have a new redsn0w 0.9.8b3 that supports a TETHERED jailbreak for iOS 4.3.4 on all devices that have 4.3.4 except the iPad2.   
The vast majority of people will want to stay back at 4.3.3 because that’s where the untethered jailbreak is!  There are no new features in 4.3.4 — only fixes for jailbreak exploits.
Also, this is a good time to remind everyone (since we’re still seeing confusion about this):  

iPad2 owners with a baseband (3G or CDMA) cannot currently use saved blobs to go back to 4.3.3 once the signing window is closed.  This is unlike every other device, so don’t be confused!  iPad2 owners with basebands should stay away from all updates to maintain the jailbreak!
Update #4:  In conjunction with iOS5 beta4 being released to iOS developers, redsn0w 0.9.8b4 is now available for jailbreak app developers (point the b4 redsn0w at the b4 IPSW).  Remember, it’s a tethered jailbreak right now so you’ll need to use redsn0w to boot into a jailbroken state at each power cycle.

NOTE: It appears that by design, the OTA update that became available starting with iOS 5 beta4 will *not* be automatically applied to jailbroken devices.  That’s a relief to those who don’t want to lose their jailbreak via OTA pushes.  If you’re jailbroken, you’ll need to use the standard iTunes method to get to iOS 5 beta4.

Update #5: redsn0w has been updated to 0.9.8b5, adding support for Apple’s new iOS5 beta5 (point it directly at the beta5 IPSW). Please use this only if you’re a jailbreak app developer with a legit Apple dev account, and remember it’s a tethered jailbreak for now!

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Here are the download links:

redsn0w 0.9.8b5 for Mac -  Redsn0w 0.9.8b5 Mac    Mirror  

redsn0w 0.9.8b5 for Windows -  Redsn0w 0.9.8b5 Win     Mirror

 

Download iOS 4.3.4 Firmware [iPhone, iPad, iPod Touch] 

iOS 4.3.4  firmware IPSW is now available for download. You can download iOS 4.3.4 firmware for iPhone 4, iPhone 3GS, iPad 2, iPad 1 and iPod Touch 4G / 3G from the links below. The iOS 4.3.4 

Apple’s support document details the technical fixes:

Impact: Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution
Description: A buffer overflow exists in FreeType’s handling of TrueType fonts. Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

For those who don’t know, PDF vulnerability was used by Comex in his JailbreakMe 3.0 to jailbreak iOS 4.3.3 on iPod Touch 4G, 3G, iPhone 4, 3GS and iPad 2, iPad 1.

ATTENTION: Jailbreakers/unlockers must stay away from iOS 4.3.4 if they want to keep Cydia and other installed jailbreak tweaks.


iOS 4.3.4

Mirror

How to Isntall iOS 4.3.4

 

Connect your iPhone/iPod Touch/iPad to iTunes, new firmware 4.3.4 availability message will appear then hit the “Download and Install” button. (Not recommended for jailbreakers and unlockers)
You can also download iOS 4.3.4 firmware from the links below. Hold down the Shit (Windows) or Alt/Option (Mac) key and hit the restore button on iTunes and select the downloaded IPSW file.
iOS 4.3 was released on March 10, iOS 4.3.1 on March 25th, and iOS 4.3.2 on April 14 and iOS 4.3.3 on May 5th this year.

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