forked from kakaroto/PL3
/
payload_dump_elfs.S
421 lines (387 loc) · 8.86 KB
/
payload_dump_elfs.S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
/*
* payload_dump_elfs.S -- PS3 Jailbreak payload
*
* Copyright (C) Youness Alaoui (KaKaRoTo)
* Copyright (C) Aaron Lindsay (Aaron')
* Copyright (C) (subdub)
*
* This software is distributed under the terms of the GNU General Public
* License ("GPL") version 3, as published by the Free Software Foundation.
*
* This payload is a modified version of the original PSJailbreak's payload.
* The people behing PSJailbrak are the original authors and copyright holders
* of the code they wrote.
*/
#include "macros.h.S"
.org 0
// Position 0x20 in the page
payload_start:
/**
* payload_entry:
* @payload_block: Pointer to the memory page containing our payload
*
* This is the entry point to the payload, it gets branched to form the injected
* shellcode in the JIG response.
* This is the main function of the exploit, its code is position
* indedependent. It copies the actual payload to a safe-from-overwrite memory,
* while it overwrites an existing function from the kernel.
* It will also add necessary syscalls and patch some areas of the kernel before
* returning the control back to it
*
* exploit_main ():
* {
* memcpy(MEM_BASE2, RESIDENT_PAYLOAD_OFFSET, RESIDENT_PAYLOAD_SIZE)
* add_kernel_module (kernel_module_struct);
* syscall_table[36] = syscall36_desc;
* ptr = patch_table;
* while (ptr[0] != NULL)
* *ptr[0] = ptr[1];
* }
*/
payload_entry:
// epilog
mflr %r0
stdu %r1, -0xa0(%r1)
std %r30, 0x90(%r1)
std %r31, 0x98(%r1)
std %r0, 0xb0(%r1)
GET_CURRENT_PAGE(%r3, %r31)
MEM_BASE (%r30) // Load 0x8000000000000000 in %r30
// Copy functions that need to stay resident in memory to MEM_BASE2
LOAD_LABEL (MEM_BASE2, %r3, %r30, 0)
addi %r4, %r31, ADDR_IN_PAGE(RESIDENT_PAYLOAD_OFFSET)
li %r5, RESIDENT_PAYLOAD_SIZE
bl pl3_memcpy
addi %r5, %r31, ADDR_IN_PAGE (patch_table)
l_apply_patches_loop:
lwz %r3, 0(%r5) // If entry in patch table is NULL, we're done
cmplwi %r3, 0
beq l_patches_applied
lwz %r4, 4(%r5)
add %r3, %r3, %r30
stw %r4, 0(%r3)
addi %r5, %r5, 8
b l_apply_patches_loop
l_patches_applied:
li %r3, 0x404
li %r4, 0x27
BRANCH_ABSOLUTE(%r5, alloc)
LOAD_LABEL2 (%r4, %r30, message_buf)
std %r3, 0(%r4)
li %r3, 0x400
li %r4, 0x27
BRANCH_ABSOLUTE(%r5, alloc)
LOAD_LABEL2 (%r4, %r30, eth_proc)
std %r3, 0(%r4)
addi %r4, %r31, ADDR_IN_PAGE(send_eth)
li %r5, 0x400
bl pl3_memcpy
bl send_eth_init
LOAD_LABEL2 (%r5, %r30, eth_dma_region)
std %r4, 0(%r5)
// prolog
ld %r30, 0x90(%r1)
ld %r31, 0x98(%r1)
ld %r0, 0xb0(%r1)
addi %r1, %r1, 0xa0
mtlr %r0
blr
/**
* patch_table:
*
* The patch table used by exploit_main to patch the kernel
* it format is .long address, .long new_value
*
* it will patch its content until the destination address is 0
*
*/
patch_table:
PATCH_INST(patch_func1 + patch_func1_offset, ld %r4, rtoc_entry_1(%r2))
PATCH_INST(patch_func1 + patch_func1_offset + 4, ld %r3, 0x20(%r28))
PATCH_INST(patch_func1 + patch_func1_offset + 8, std %r3, 0(%r4))
PATCH_BRANCH_MEM2 (patch_func2 + patch_func2_offset, bl, memory_patching)
PATCH_INST(patch_func4 + patch_func4_offset, li %r4, 0)
PATCH_INST(patch_func4 + patch_func4_offset + 4, stw %r4, 0(%r3))
PATCH_INST(patch_func4 + patch_func4_offset + 8, blr)
PATCH_INST(patch_func5 + patch_func5_offset, li %r3, 1)
PATCH_INST(patch_func5 + patch_func5_offset + 4, blr)
PATCH_DATA(patch_data1, 0x01000000)
.long 0
#include "send_eth.h.S"
#include "pl3_memcpy.h.S"
/**
* overwritten_kernel_function:
*
* For now noone knows what the original kernel function did, but
* this just patches it up to just return 1, and also replaces its
* content with our own payload
*
*/
.align 4
overwritten_kernel_function:
li %r3, 1
blr
message_buf:
.quad 0
eth_proc:
.quad 0
eth_dma_region:
.quad 0
flags:
.long 0
.long 0
/**
* memory_patching:
* @arg1:
* @arg2:
*
*
* memory_patching (arg1, arg2):
* {
static uint32 total = 0 ;
uint64 *ptr = rtoc[38400][104][24]
uint64 *ptr2 = rtoc[3848]
if ((arg1[24][48] >> 16) == 0x29) {
if (ptr[16] << 24 >> 56) != 0xFF) {
ptr[16] |= 3
arg2[0] = 6
} else {
ptr[16] |= 2
arg2[0] = 0x2c
}
ptr2[0] += ptr[4]
memcpy(ptr2[0], ptr[8], ptr[4])
} else {
unknown_func1 (arg1, arg2) // 0x4e81c
total += ptr[4]
if (ptr[16] << 24 >> 56) != 0xFF) {
hash = 0
for (i = 0, i < 0x400, i++)
hash ^= ptr2[0][i] // array of 4 bytes
hash = (hash << 32) | total
total = 0
for (uint64_t p = memory_patch_table, *p, p+=2) {
if (hash != p[0])
continue
for (uint32_t p2 = p[1], *p2, p2+=2)
ptr2[0][p2[0]] = p2[1]
}
}
}
return 0
}
*/
memory_patching:
mflr %r0
stdu %r1, -0x1a0(%r1)
std %r27, 0x78(%r1)
std %r28, 0x80(%r1)
std %r29, 0x88(%r1)
std %r30, 0x90(%r1)
std %r31, 0x98(%r1)
std %r0, 0x1b0(%r1)
mr %r29, %r3
mr %r30, %r4
MEM_BASE (%r31)
ld %r28, rtoc_entry_2(%r2)
ld %r28, 0x68(%r28)
ld %r28, 0x18(%r28)
ld %r27, rtoc_entry_1(%r2)
ld %r9, 0x18(%r29)
lwz %r9, 0x30(%r9)
rldicl %r9, %r9, 48, 16
cmpwi %r9, 0x29
bne loc_4d4
ld %r4, 0x10(%r28)
rldicr %r5, %r4, 24, 39
rldicl %r5, %r5, 8, 56
cmpwi %r5, 0xff
beq loc_4a8
ori %r4, %r4, 3
std %r4, 0x10(%r28)
li %r3, 6
stw %r3, 0(%r30)
b loc_4b8
loc_4a8:
ori %r4, %r4, 2
std %r4, 0x10(%r28)
li %r3, 0x2c
stw %r3, 0(%r30)
loc_4b8:
lwz %r5, 4(%r28)
ld %r4, 8(%r28)
ld %r3, 0(%r27)
add %r9, %r3, %r5
std %r9, 0(%r27)
bl ABSOLUTE_MEM2(memcpy)
b loc_594
loc_4d4:
mr %r3, %r29
mr %r4, %r30
bl ABSOLUTE_MEM2(memory_patch_func)
mr %r29, %r31
LOADI_LABEL2(%r29, flags)
lwz %r3, 0(%r29)
lwz %r5, 4(%r28)
add %r3, %r3, %r5
stw %r3, 0(%r29)
ld %r4, 0x10(%r28)
rldicr %r5, %r4, 24, 39
rldicl %r5, %r5, 8, 56
cmpwi %r5, 0xff
bne loc_594
ld %r3, 0(%r27)
li %r4, 0
li %r6, 0
loc_51c:
add %r7, %r3, %r4
lwz %r5, 0(%r7)
xor %r6, %r6, %r5
addi %r4, %r4, 4
cmpldi %r4, 0x400
bne loc_51c
lwz %r3, 0(%r29)
rldicr %r6, %r6, 32, 31
or %r6, %r6, %r3
li %r3, 0
stw %r3, 0(%r29)
LOAD_LABEL2 (%r4, %r31, hash)
std %r6, 0(%r4)
ld %r3, 0(%r28)
std %r3, 8(%r4)
ld %r3, 8(%r27)
ld %r3, 0(%r3)
std %r3, 16(%r4)
mr %r28, %r6
li %r3, 0x7000
bl send_elfs
mr %r6, %r28
mr %r7, %r31
LOADI_LABEL2(%r7, memory_patch_table)
loc_554:
ld %r3, 0(%r7)
cmpldi %r3, 0
beq loc_594
addi %r7, %r7, 0x10
cmpld %r3, %r6
bne loc_554
ld %r5, -8(%r7)
ld %r7, 0(%r27)
loc_574:
lwz %r3, 0(%r5)
cmplwi %r3, 0
beq loc_594
lwz %r4, 4(%r5)
add %r3, %r3, %r7
stw %r4, 0(%r3)
addi %r5, %r5, 8
b loc_574
loc_594:
li %r3, 0
ld %r27, 0x78(%r1)
ld %r28, 0x80(%r1)
ld %r29, 0x88(%r1)
ld %r30, 0x90(%r1)
ld %r31, 0x98(%r1)
ld %r0, 0x1b0(%r1)
addi %r1, %r1, 0x1a0
mtlr %r0
blr
send_elfs:
mflr %r0
stdu %r1, -0xa0(%r1)
std %r28, 0x80(%r1)
std %r29, 0x88(%r1)
std %r0, 0xb0(%r1)
mr %r28, %r3
LOAD_LABEL2 (%r3, %r31, eth_dma_region)
ld %r3, 0(%r3)
LOAD_LABEL2 (%r4, %r31, hash)
li %r5, 64
LOAD_LABEL2 (%r6, %r31, eth_proc)
ld %r6, 0(%r6)
mtctr %r6
bctrl
li %r29, 0
l_loop_copy:
ld %r3, 0(%r27)
add %r3, %r3, %r29
li %r4, 0
li %r6, 0
l_loop_hash:
add %r7, %r3, %r4
lwz %r5, 0(%r7)
or %r6, %r6, %r5
addi %r4, %r4, 4
cmpldi %r4, 0x400
bne l_loop_hash
cmpwi %r6, 0
beq l_hash_0
ld %r3, 0(%r27)
add %r3, %r3, %r29
LOAD_LABEL2 (%r4, %r31, message_buf)
ld %r4, 0(%r4)
stw %r29, 0(%r4)
addi %r4, %r4, 4
li %r5, 1024
l_loop_memcpy:
subi %r5, %r5, 1 // set %r5 to read the previous byte
lbzx %r6, %r3, %r5 // Copy byte content of %r3[%r5] to %r6
stbx %r6, %r4, %r5 // Store byte %r6 to %r4[%r5]
cmpldi %r5, 0 // if %r5 reaches 0, end it
bne l_loop_memcpy
LOAD_LABEL2 (%r3, %r31, eth_dma_region)
ld %r3, 0(%r3)
LOAD_LABEL2 (%r4, %r31, message_buf)
ld %r4, 0(%r4)
li %r5, 1028
LOAD_LABEL2 (%r6, %r31, eth_proc)
ld %r6, 0(%r6)
mtctr %r6
bctrl
addi %r29, %r29, 1024
cmpld %r29, %r28
b l_loop_copy
l_hash_0:
ld %r28, 0x80(%r1)
ld %r29, 0x88(%r1)
ld %r0, 0xb0(%r1)
addi %r1, %r1, 0xa0
mtlr %r0
blr
hash:
.space 64
memory_patch_table:
.quad HASH_TABLE_1
QUAD_MEM2(memory_patch_table_1)
.quad HASH_TABLE_3
QUAD_MEM2(memory_patch_table_3)
.quad HASH_TABLE_2
QUAD_MEM2(memory_patch_table_2)
.quad HASH_TABLE_4
QUAD_MEM2(memory_patch_table_4)
.quad 0x0000000000000000
memory_patch_table_1:
PATCH_INST(elf1_func2 + elf1_func2_offset, li %r3, 130)
PATCH_INST(elf1_func1 + elf1_func1_offset, li %r3, 1)
PATCH_INST(elf1_func1 + elf1_func1_offset + 4, blr)
.long 0
memory_patch_table_2:
PATCH_INST(elf2_func1 + elf2_func1_offset, li %r29, 1)
.long 0
memory_patch_table_3:
PATCH_DATA(elf3_data, 0x5f746f6f)
PATCH_DATA(elf3_data + 4, 0x6c322e78)
PATCH_DATA(elf3_data + 8, 0x6d6c2372)
PATCH_DATA(elf3_data + 12, 0x6f6f7400)
.long 0
memory_patch_table_4:
PATCH_DATA(elf4_data, 0x5f746f6f)
PATCH_DATA(elf4_data + 4, 0x6c322e78)
PATCH_DATA(elf4_data + 8, 0x6d6c2372)
PATCH_DATA(elf4_data + 12, 0x6f6f7400)
.long 0
psfreedom:
.string "PSFreedom"
payload_end:
.org RESIDENT_PAYLOAD_OFFSET + RESIDENT_PAYLOAD_MAXSIZE