Neuralic, one of the researchers involved in the exploit, posted on Twitter earlier, that they have made use of device backups taken by the desktop manager that aren’t digitally signed to jailbreak the Blackberry Playbook tablet. Here is an extract from threatpost
“The Dingleberry exploit works by exploiting the fact that the backups taken by the desktop manager aren’t signed. It modifys [sic] the smb.conf,” Wade said in the message. “Which enables us to have it run a script as root whenever an smb connection is made.”
He posted a video on YouTube showing the jailbreak a week and a half ago, but has now posted more detailed instructions on how to go about doing it yourself. He has also said that people wishing to do this do so at their own risk and he takes no responsibility for your device. The other very important thing not to do, is upgrade your Playbooks firmware to the latest release (version 188.8.131.5267), as that will patch the exploit used in Dingleberry.
Once the jailbreak is completed by the user, they will then be able to install apk’s (apps) from the Android marketplace. For other apk’s he adds:
For other apks, you can temporarily replace the file “PackageInstaller.apk” in /system/app with the PackageInstaller.app from cyanogenmod. You must restore the original PackageInstaller.apk before the next time that the android player reloads. You can use this method to get apps that update themselves by downloading a .apk file to work (eg: HCL Launcher Updater)
The tool need to jailbreak the Playbook is Dingleberry and can be found here. You can also ask them questions or get help on how to do it on their IRC channel irc.freenode.net
Officials at Research In Motion said (Dec 1 2011) that they were aware of the situation and were in contact with one of the researchers regarding the technique.
“RIM is currently investigating this claim and has been in contact with one of the security researchers to discuss it. If it is determined that the claim is accurate, RIM will follow its standard response process to develop and release a software update that is designed to minimize adverse impact to our customers or carrier partners. RIM is aware that the security researchers have stated they intend to release a tool to jailbreak the BlackBerry PlayBook tablet. If such a tool is released, RIM will investigate it.”
Now the tool has been released RIM stated
“RIM is aware of reports that a security researcher has released a tool designed to allow BlackBerry PlayBook users to jailbreak their tablet. RIM is following its standard security response process to investigate the functionality and impact of this tool and if needed, RIM will develop, test, and release a software update that is designed to minimize the potential adverse impact to our customers,” the company said in a statement.
For those interested in watching the jailbroken device can view below
If you have a Playbook and fancy having a go at this yourself, then make sure you back up first, and then read the detailed instructions here.
Here are a few screenshots from the Dingleberry tool