AT+XLOG Vulnerability

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Used as an injection vector in purplesn0w and older versions of ultrasn0w to unlock the X-Gold 608. Currently available in all baseband versions until 4.26.08.

Credit

Oranav

Exploit

There is a stack overflow in the AT+XLOG=1,"..." command, which allows unsigned code execution on the X-Gold 608.

at+xlog=1,"jjjjjjjjjjjjjjjjjjjjjjjjjjjj44445555PPPP"
j's are junk
R4 = 4
R5 = 5
PC = P

Implementation

The exploit is used in ultrasn0w and purplesn0w.