Researcher Unlocks Galaxy S4 Bootloader For AT&T, Verizon Phones

[wraggster]

Those of you who like to tinker and jailbreak Android phones should take notice of some new research conducted on Samsung Galaxy S4 Android devices shipped by AT&T and Verizon. Both devicemakers ship the Galaxy S4 smartphones with a locked-down bootloader that prevents users from uploading custom kernels or from making modifications to software on the phone. Azimuth Security researcher Dan Rosenberg has found a vulnerability in the manner in which the devices do cryptographic checks of boot image signatures (http://blog.azimuthsecurity.com/2013/05/exploiting-samsung-galaxy-s4-secure-boot.html) and was able to exploit the flaw and upload his own unsigned kernel to the device (https://threatpost.com/researcher-unlocks-samsung-galaxy-s4-bootloader-for-att-verizon-android-phones/)."

http://mobile.slashdot.org/story/13/05/25/1633247/researcher-unlocks-galaxy-s4-bootloader-for-att-verizon-phones