November 28, 2022
Similarities/Differences Between QuickPwn and ZiPhone

Similarities/Differences Between QuickPwn and ZiPhone

Posted August 28, 2008 at 3:15pm by iClarified · 12987 views
PlanetBeing has posted a history of ZiPhone and QuickPwn which describes their similarities and differences.

Similarities
Jailbreak
- Both utilities jailbreak.

Payload medium
- Primary jailbreak payload is placed into iPhone memory for both jailbreaks

Differences
Technique
ZiPhone uses, as the root filesystem device, a pseudo-device that provides a window to an arbitrary section of memory. This memory is not allocated or otherwise reserved by the operating system and hence will be used by other random processes in other random ways and will become more and more corrupted with every CPU clock cycle. The only safe way to use this is to mlock all memory used by the jailbreak binary as soon as possible, and then use data previously uploaded to flash. Anything else will cause either the jailbreak binary to crash at random moments or cause random data to be written to flash. I am not sure why Zibri elected not to implement ZiPhone in a safer fashion.

QuickPwn uses the same mechanism that Apple uses to send its update ramdisk. This memory is both allocated and reserved. It will not crash at random moments, or give you repeating BSD root errors. This is the way the XNU kernel is designed to use ramdisks.

History
Zibri claims to have "invented the ramdisk jailbreak". Even if this were true, it would have as much relevance to QuickPwn as the 1.0.2 jailbreak does: The techniques used are entirely dissimilar. Not a single step in the process is the same.

However, this is not even true. Before Zibri left, we already had a prototype ramdisk jailbreak in our SVN (which Zibri later leaked parts of). It was written by myself and stored under the very obvious name of "ramdisk-jb" and it contained a modified version of a launchd written by Turbo (who should be considered the father of the ramdisk payload). It basically untarred a SSH installation onto the rootfs. It was rudimentary, and required a lot of work to get up to production standards.

Read More


Similarities/Differences Between QuickPwn and ZiPhone
Add Comment
Would you like to be notified when someone replies or adds a new comment?
Yes (All Threads)
Yes (This Thread Only)
No
iClarified Icon
Notifications
Would you like to be notified when we post a new Apple news article or tutorial?
Yes
No
You must login or register to add a comment...
Rob
Rob - August 28, 2008 at 5:17pm
Oh, I'd give real money if these guys would just stop bickering! You wanna do something constructive? Give us WinPwn for 2.0.2! Who cares about QuickPwn? It's useless since it updates the baseband when you use it, which in term screws up your chances of unlocking the iPhone 3G.
Recent. Read the latest Apple News.
RECENT
Tutorials. Help is here.
TUTORIALS
How to Fix 'No Matching Host Key Type Found' on Mac
How to Stream the World Cup Using a VPN
Where to Download macOS Ventura
AppleTV Firmware Download Locations
Where To Download iPhone Firmware Files From
Deals. Save on Apple devices and accessories.
DEALS