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Difference between revisions of "AT+XEMN Heap Overflow"
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=== July 2009 === |
=== July 2009 === |
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*[[User:Oranav|Oranav]] discovers this crash and gives is to the [[iPhone Dev Team]]. |
*[[User:Oranav|Oranav]] discovers this crash and gives is to the [[iPhone Dev Team]]. |
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| − | *Upon initial investigation, The [[iPhone Dev Team]], mistakenly |
+ | *Upon initial investigation, The [[iPhone Dev Team]], mistakenly concludes that the crash is non-exploitable. |
=== September 2009 === |
=== September 2009 === |
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Revision as of 22:55, 1 November 2009
AT+XEMN is a command on baseband 5.11.07 (pushed out with the 3.1 release), which when exploited correctly, causes a heap overflow allowing the crash to be moulded into an injection vector. This injection vector can then be used to inject an unlocking payload to provide a coveted Software SIM Unlock on the official 3.1(.2) firmware running 5.11.07
Contents
Credit
Implementation
This exploit is used in blacksn0w.
Exception Dump
+XLOG: Exception Number: 1 Trap Class: 0xDDDD (SW GENERATED TRAP) Identification: 140 (0x008C) Date: 22.10.2009 Time: 00:30 File: atform/text/_malloc.c Line: 1036 Logdata: 2E 0C 76 ED 40 14 31 64 61 74 63 3A 31 00 64 63 ..v.@.1datc:1.dc 20 44 F4 E9 20 20 20 20 20 20 20 20 20 20 20 20 D.. 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Timeline
July 2009
- Oranav discovers this crash and gives is to the iPhone Dev Team.
- Upon initial investigation, The iPhone Dev Team, mistakenly concludes that the crash is non-exploitable.
September 2009
- iH8sn0w discovered this command independently but kept it a secret for about a month. [1]
October 2009
- When the Dev-Team stated that iH8sn0w did not have a unlock, he posted the command on Twitter. [2]
- Shortly after, Oranav posted his Hash from July. [3]
- MuscleNerd tells iHacker that the crash was received awhile ago and is thought to be non-exploitable. [4][5]
- Geohot attempts to exploit this crash, but intially also finds it to be non-exploitable. [6]
- Geohot does more investigation and discovers that this crash is indeed exploitable, and that it's a heap overflow. [7]
- Geohot achieves arbitrary code execution and begins work on unlock which will be called blacksn0w. [8]
- Geohot posts a video of an unlocked 05.11.07 device. [9]
