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AT+XAPP Vulnerability
Used as an injection vector for the X-Gold 608 and XMM 6180 unlock payload. Currently available in all X-Gold 608 basebands until 5.13.04, and XMM 6180 baseband 1.59.00.
Credit
- vulnerability: sherif_hashim, also discovered by westbaer, geohot and Oranav (each one independently)
- exploitation: iPhone Dev Team
Exploit
There is a stack overflow in the AT+XAPP="..." command, which allows unsigned code execution on the X-Gold 608 and XMM 6180.
at+xapp="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4444555566667777PPPP"
Applying a string of more than 52 characters will trigger the overflow.
Implementation
The exploit was used by iPhone Dev Team in ultrasn0w 1.0-1, which is able to unlock the X-Gold 608 basebands 4.26.08, 5.11.07, 5.12.01 and 5.13.04, and XMM 6180 baseband 1.59.00.
