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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/common/sandbox_policy.h" | 5 #include "content/common/sandbox_win.h" |
6 | 6 |
7 #include <string> | 7 #include <string> |
8 | 8 |
9 #include "base/command_line.h" | 9 #include "base/command_line.h" |
10 #include "base/debug/debugger.h" | 10 #include "base/debug/debugger.h" |
11 #include "base/debug/trace_event.h" | 11 #include "base/debug/trace_event.h" |
12 #include "base/file_util.h" | 12 #include "base/file_util.h" |
13 #include "base/lazy_instance.h" | |
14 #include "base/logging.h" | |
15 #include "base/path_service.h" | 13 #include "base/path_service.h" |
16 #include "base/process_util.h" | 14 #include "base/process_util.h" |
17 #include "base/string_util.h" | 15 #include "base/string_util.h" |
18 #include "base/stringprintf.h" | 16 #include "base/stringprintf.h" |
19 #include "base/win/iat_patch_function.h" | 17 #include "base/win/iat_patch_function.h" |
20 #include "base/win/scoped_handle.h" | 18 #include "base/win/scoped_handle.h" |
21 #include "base/win/scoped_process_information.h" | 19 #include "base/win/scoped_process_information.h" |
22 #include "base/win/windows_version.h" | 20 #include "base/win/windows_version.h" |
23 #include "content/common/debug_flags.h" | 21 #include "content/common/debug_flags.h" |
24 #include "content/public/common/content_client.h" | 22 #include "content/public/common/content_client.h" |
25 #include "content/public/common/content_switches.h" | 23 #include "content/public/common/content_switches.h" |
26 #include "content/public/common/process_type.h" | 24 #include "content/public/common/process_type.h" |
27 #include "content/public/common/sandbox_init.h" | 25 #include "content/public/common/sandbox_init.h" |
26 #include "content/public/common/sandboxed_process_launcher_delegate.h" | |
28 #include "sandbox/win/src/process_mitigations.h" | 27 #include "sandbox/win/src/process_mitigations.h" |
29 #include "sandbox/win/src/sandbox.h" | 28 #include "sandbox/win/src/sandbox.h" |
30 #include "sandbox/win/src/sandbox_nt_util.h" | 29 #include "sandbox/win/src/sandbox_nt_util.h" |
31 #include "sandbox/win/src/win_utils.h" | 30 #include "sandbox/win/src/win_utils.h" |
32 #include "ui/gl/gl_switches.h" | |
33 | 31 |
34 static sandbox::BrokerServices* g_broker_services = NULL; | 32 static sandbox::BrokerServices* g_broker_services = NULL; |
35 static sandbox::TargetServices* g_target_services = NULL; | 33 static sandbox::TargetServices* g_target_services = NULL; |
36 | 34 |
35 namespace content { | |
37 namespace { | 36 namespace { |
38 | 37 |
39 // The DLLs listed here are known (or under strong suspicion) of causing crashes | 38 // The DLLs listed here are known (or under strong suspicion) of causing crashes |
40 // when they are loaded in the renderer. Note: at runtime we generate short | 39 // when they are loaded in the renderer. Note: at runtime we generate short |
41 // versions of the dll name only if the dll has an extension. | 40 // versions of the dll name only if the dll has an extension. |
42 const wchar_t* const kTroublesomeDlls[] = { | 41 const wchar_t* const kTroublesomeDlls[] = { |
43 L"adialhk.dll", // Kaspersky Internet Security. | 42 L"adialhk.dll", // Kaspersky Internet Security. |
44 L"acpiz.dll", // Unknown. | 43 L"acpiz.dll", // Unknown. |
45 L"avgrsstx.dll", // AVG 8. | 44 L"avgrsstx.dll", // AVG 8. |
46 L"babylonchromepi.dll", // Babylon translator. | 45 L"babylonchromepi.dll", // Babylon translator. |
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104 L"smumhook.dll", // Spyware Doctor version 5. | 103 L"smumhook.dll", // Spyware Doctor version 5. |
105 L"ssldivx.dll", // DivX. | 104 L"ssldivx.dll", // DivX. |
106 L"syncor11.dll", // SynthCore Midi interface. | 105 L"syncor11.dll", // SynthCore Midi interface. |
107 L"systools.dll", // Panda Antivirus. | 106 L"systools.dll", // Panda Antivirus. |
108 L"tfwah.dll", // Threatfire (PC tools). | 107 L"tfwah.dll", // Threatfire (PC tools). |
109 L"wblind.dll", // Stardock Object desktop. | 108 L"wblind.dll", // Stardock Object desktop. |
110 L"wbhelp.dll", // Stardock Object desktop. | 109 L"wbhelp.dll", // Stardock Object desktop. |
111 L"winstylerthemehelper.dll" // Tuneup utilities 2006. | 110 L"winstylerthemehelper.dll" // Tuneup utilities 2006. |
112 }; | 111 }; |
113 | 112 |
114 // The DLLs listed here are known (or under strong suspicion) of causing crashes | |
115 // when they are loaded in the GPU process. | |
116 const wchar_t* const kTroublesomeGpuDlls[] = { | |
117 L"cmsetac.dll", // Unknown (suspected malware). | |
118 }; | |
119 | |
120 // Adds the policy rules for the path and path\ with the semantic |access|. | 113 // Adds the policy rules for the path and path\ with the semantic |access|. |
121 // If |children| is set to true, we need to add the wildcard rules to also | 114 // If |children| is set to true, we need to add the wildcard rules to also |
122 // apply the rule to the subfiles and subfolders. | 115 // apply the rule to the subfiles and subfolders. |
123 bool AddDirectory(int path, const wchar_t* sub_dir, bool children, | 116 bool AddDirectory(int path, const wchar_t* sub_dir, bool children, |
124 sandbox::TargetPolicy::Semantics access, | 117 sandbox::TargetPolicy::Semantics access, |
125 sandbox::TargetPolicy* policy) { | 118 sandbox::TargetPolicy* policy) { |
126 base::FilePath directory; | 119 base::FilePath directory; |
127 if (!PathService::Get(path, &directory)) | 120 if (!PathService::Get(path, &directory)) |
128 return false; | 121 return false; |
129 | 122 |
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225 } | 218 } |
226 | 219 |
227 // Adds policy rules for unloaded the known dlls that cause chrome to crash. | 220 // Adds policy rules for unloaded the known dlls that cause chrome to crash. |
228 // Eviction of injected DLLs is done by the sandbox so that the injected module | 221 // Eviction of injected DLLs is done by the sandbox so that the injected module |
229 // does not get a chance to execute any code. | 222 // does not get a chance to execute any code. |
230 void AddGenericDllEvictionPolicy(sandbox::TargetPolicy* policy) { | 223 void AddGenericDllEvictionPolicy(sandbox::TargetPolicy* policy) { |
231 for (int ix = 0; ix != arraysize(kTroublesomeDlls); ++ix) | 224 for (int ix = 0; ix != arraysize(kTroublesomeDlls); ++ix) |
232 BlacklistAddOneDll(kTroublesomeDlls[ix], true, policy); | 225 BlacklistAddOneDll(kTroublesomeDlls[ix], true, policy); |
233 } | 226 } |
234 | 227 |
235 // Same as AddGenericDllEvictionPolicy but specifically for the GPU process. | |
236 // In this we add the blacklisted dlls even if they are not loaded in this | |
237 // process. | |
238 void AddGpuDllEvictionPolicy(sandbox::TargetPolicy* policy) { | |
239 for (int ix = 0; ix != arraysize(kTroublesomeGpuDlls); ++ix) | |
240 BlacklistAddOneDll(kTroublesomeGpuDlls[ix], false, policy); | |
241 } | |
242 | |
243 // Returns the object path prepended with the current logon session. | 228 // Returns the object path prepended with the current logon session. |
244 string16 PrependWindowsSessionPath(const char16* object) { | 229 string16 PrependWindowsSessionPath(const char16* object) { |
245 // Cache this because it can't change after process creation. | 230 // Cache this because it can't change after process creation. |
246 static uintptr_t s_session_id = 0; | 231 static uintptr_t s_session_id = 0; |
247 if (s_session_id == 0) { | 232 if (s_session_id == 0) { |
248 HANDLE token; | 233 HANDLE token; |
249 DWORD session_id_length; | 234 DWORD session_id_length; |
250 DWORD session_id = 0; | 235 DWORD session_id = 0; |
251 | 236 |
252 CHECK(::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token)); | 237 CHECK(::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token)); |
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284 sizeof(job_info), NULL)) { | 269 sizeof(job_info), NULL)) { |
285 NOTREACHED() << "QueryInformationJobObject failed. " << GetLastError(); | 270 NOTREACHED() << "QueryInformationJobObject failed. " << GetLastError(); |
286 return true; | 271 return true; |
287 } | 272 } |
288 if (job_info.BasicLimitInformation.LimitFlags & JOB_OBJECT_LIMIT_BREAKAWAY_OK) | 273 if (job_info.BasicLimitInformation.LimitFlags & JOB_OBJECT_LIMIT_BREAKAWAY_OK) |
289 return true; | 274 return true; |
290 | 275 |
291 return false; | 276 return false; |
292 } | 277 } |
293 | 278 |
294 void SetJobLevel(const CommandLine& cmd_line, | |
295 sandbox::JobLevel job_level, | |
296 uint32 ui_exceptions, | |
297 sandbox::TargetPolicy* policy) { | |
298 if (ShouldSetJobLevel(cmd_line)) | |
299 policy->SetJobLevel(job_level, ui_exceptions); | |
300 else | |
301 policy->SetJobLevel(sandbox::JOB_NONE, 0); | |
302 } | |
303 | |
304 // Closes handles that are opened at process creation and initialization. | |
305 void AddBaseHandleClosePolicy(sandbox::TargetPolicy* policy) { | |
306 // Being able to manipulate anything BaseNamedObjects is bad. | |
307 string16 object_path = PrependWindowsSessionPath(L"\\BaseNamedObjects"); | |
308 policy->AddKernelObjectToClose(L"Directory", object_path.data()); | |
309 object_path = PrependWindowsSessionPath( | |
310 L"\\BaseNamedObjects\\windows_shell_global_counters"); | |
311 policy->AddKernelObjectToClose(L"Section", object_path.data()); | |
312 } | |
313 | |
314 // Adds the generic policy rules to a sandbox TargetPolicy. | 279 // Adds the generic policy rules to a sandbox TargetPolicy. |
315 bool AddGenericPolicy(sandbox::TargetPolicy* policy) { | 280 bool AddGenericPolicy(sandbox::TargetPolicy* policy) { |
316 sandbox::ResultCode result; | 281 sandbox::ResultCode result; |
317 | 282 |
283 // Renderers need to copy sections for plugin DIBs and GPU. | |
284 // GPU needs to copy sections to renderers. | |
285 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | |
jam
2013/03/19 16:06:27
this same code was in AddPolicyForGPU and AddPolic
| |
286 sandbox::TargetPolicy::HANDLES_DUP_ANY, | |
287 L"Section"); | |
288 if (result != sandbox::SBOX_ALL_OK) | |
289 return false; | |
290 | |
318 // Add the policy for the client side of a pipe. It is just a file | 291 // Add the policy for the client side of a pipe. It is just a file |
319 // in the \pipe\ namespace. We restrict it to pipes that start with | 292 // in the \pipe\ namespace. We restrict it to pipes that start with |
320 // "chrome." so the sandboxed process cannot connect to system services. | 293 // "chrome." so the sandboxed process cannot connect to system services. |
321 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, | 294 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, |
322 sandbox::TargetPolicy::FILES_ALLOW_ANY, | 295 sandbox::TargetPolicy::FILES_ALLOW_ANY, |
323 L"\\??\\pipe\\chrome.*"); | 296 L"\\??\\pipe\\chrome.*"); |
324 if (result != sandbox::SBOX_ALL_OK) | 297 if (result != sandbox::SBOX_ALL_OK) |
325 return false; | 298 return false; |
326 // Allow the server side of a pipe restricted to the "chrome.nacl." | 299 |
327 // namespace so that it cannot impersonate other system or other chrome | |
328 // service pipes. | |
329 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, | |
330 sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, | |
331 L"\\\\.\\pipe\\chrome.nacl.*"); | |
332 if (result != sandbox::SBOX_ALL_OK) | |
333 return false; | |
334 // Allow the server side of sync sockets, which are pipes that have | 300 // Allow the server side of sync sockets, which are pipes that have |
335 // the "chrome.sync" namespace and a randomly generated suffix. | 301 // the "chrome.sync" namespace and a randomly generated suffix. |
336 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, | 302 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, |
337 sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, | 303 sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, |
338 L"\\\\.\\pipe\\chrome.sync.*"); | 304 L"\\\\.\\pipe\\chrome.sync.*"); |
339 if (result != sandbox::SBOX_ALL_OK) | 305 if (result != sandbox::SBOX_ALL_OK) |
340 return false; | 306 return false; |
341 | 307 |
342 // Add the policy for debug message only in debug | 308 // Add the policy for debug message only in debug |
343 #ifndef NDEBUG | 309 #ifndef NDEBUG |
344 base::FilePath app_dir; | 310 base::FilePath app_dir; |
345 if (!PathService::Get(base::DIR_MODULE, &app_dir)) | 311 if (!PathService::Get(base::DIR_MODULE, &app_dir)) |
346 return false; | 312 return false; |
347 | 313 |
348 wchar_t long_path_buf[MAX_PATH]; | 314 wchar_t long_path_buf[MAX_PATH]; |
349 DWORD long_path_return_value = GetLongPathName(app_dir.value().c_str(), | 315 DWORD long_path_return_value = GetLongPathName(app_dir.value().c_str(), |
350 long_path_buf, | 316 long_path_buf, |
351 MAX_PATH); | 317 MAX_PATH); |
352 if (long_path_return_value == 0 || long_path_return_value >= MAX_PATH) | 318 if (long_path_return_value == 0 || long_path_return_value >= MAX_PATH) |
353 return false; | 319 return false; |
354 | 320 |
355 base::FilePath debug_message(long_path_buf); | 321 base::FilePath debug_message(long_path_buf); |
356 debug_message = debug_message.AppendASCII("debug_message.exe"); | 322 debug_message = debug_message.AppendASCII("debug_message.exe"); |
357 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_PROCESS, | 323 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_PROCESS, |
358 sandbox::TargetPolicy::PROCESS_MIN_EXEC, | 324 sandbox::TargetPolicy::PROCESS_MIN_EXEC, |
359 debug_message.value().c_str()); | 325 debug_message.value().c_str()); |
360 if (result != sandbox::SBOX_ALL_OK) | 326 if (result != sandbox::SBOX_ALL_OK) |
361 return false; | 327 return false; |
362 #endif // NDEBUG | 328 #endif // NDEBUG |
329 | |
330 AddGenericDllEvictionPolicy(policy); | |
331 | |
363 return true; | 332 return true; |
364 } | 333 } |
365 | 334 |
366 // For the GPU process we gotten as far as USER_LIMITED. The next level | 335 bool AddPolicyForSandboxedProcess(sandbox::TargetPolicy* policy) { |
jam
2013/03/19 16:06:27
(I renamed this to something more generic since it
| |
367 // which is USER_RESTRICTED breaks both the DirectX backend and the OpenGL | |
368 // backend. Note that the GPU process is connected to the interactive | |
369 // desktop. | |
370 // TODO(cpu): Lock down the sandbox more if possible. | |
371 bool AddPolicyForGPU(CommandLine* cmd_line, sandbox::TargetPolicy* policy) { | |
372 #if !defined(NACL_WIN64) // We don't need this code on win nacl64. | |
373 if (base::win::GetVersion() > base::win::VERSION_XP) { | |
374 if (cmd_line->GetSwitchValueASCII(switches::kUseGL) == | |
375 gfx::kGLImplementationDesktopName) { | |
376 // Open GL path. | |
377 policy->SetTokenLevel(sandbox::USER_RESTRICTED_SAME_ACCESS, | |
378 sandbox::USER_LIMITED); | |
379 SetJobLevel(*cmd_line, sandbox::JOB_UNPROTECTED, 0, policy); | |
380 policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_LOW); | |
381 } else { | |
382 if (cmd_line->GetSwitchValueASCII(switches::kUseGL) == | |
383 gfx::kGLImplementationSwiftShaderName || | |
384 cmd_line->HasSwitch(switches::kReduceGpuSandbox) || | |
385 cmd_line->HasSwitch(switches::kDisableImageTransportSurface)) { | |
386 // Swiftshader path. | |
387 policy->SetTokenLevel(sandbox::USER_RESTRICTED_SAME_ACCESS, | |
388 sandbox::USER_LIMITED); | |
389 } else { | |
390 // Angle + DirectX path. | |
391 policy->SetTokenLevel(sandbox::USER_RESTRICTED_SAME_ACCESS, | |
392 sandbox::USER_RESTRICTED); | |
393 // This is a trick to keep the GPU out of low-integrity processes. It | |
394 // starts at low-integrity for UIPI to work, then drops below | |
395 // low-integrity after warm-up. | |
396 policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_UNTRUSTED); | |
397 } | |
398 | |
399 // UI restrictions break when we access Windows from outside our job. | |
400 // However, we don't want a proxy window in this process because it can | |
401 // introduce deadlocks where the renderer blocks on the gpu, which in | |
402 // turn blocks on the browser UI thread. So, instead we forgo a window | |
403 // message pump entirely and just add job restrictions to prevent child | |
404 // processes. | |
405 SetJobLevel(*cmd_line, | |
406 sandbox::JOB_LIMITED_USER, | |
407 JOB_OBJECT_UILIMIT_SYSTEMPARAMETERS | | |
408 JOB_OBJECT_UILIMIT_DESKTOP | | |
409 JOB_OBJECT_UILIMIT_EXITWINDOWS | | |
410 JOB_OBJECT_UILIMIT_DISPLAYSETTINGS, | |
411 policy); | |
412 | |
413 policy->SetIntegrityLevel(sandbox::INTEGRITY_LEVEL_LOW); | |
414 } | |
415 } else { | |
416 SetJobLevel(*cmd_line, sandbox::JOB_UNPROTECTED, 0, policy); | |
417 policy->SetTokenLevel(sandbox::USER_UNPROTECTED, | |
418 sandbox::USER_LIMITED); | |
419 } | |
420 | |
421 // Allow the server side of GPU sockets, which are pipes that have | |
422 // the "chrome.gpu" namespace and an arbitrary suffix. | |
423 sandbox::ResultCode result = policy->AddRule( | |
424 sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, | |
425 sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, | |
426 L"\\\\.\\pipe\\chrome.gpu.*"); | |
427 if (result != sandbox::SBOX_ALL_OK) | |
428 return false; | |
429 | |
430 // GPU needs to copy sections to renderers. | |
431 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | |
432 sandbox::TargetPolicy::HANDLES_DUP_ANY, | |
433 L"Section"); | |
434 if (result != sandbox::SBOX_ALL_OK) | |
435 return false; | |
436 | |
437 #ifdef USE_AURA | |
438 // GPU also needs to add sections to the browser for aura | |
439 // TODO(jschuh): refactor the GPU channel to remove this. crbug.com/128786 | |
440 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | |
441 sandbox::TargetPolicy::HANDLES_DUP_BROKER, | |
442 L"Section"); | |
443 if (result != sandbox::SBOX_ALL_OK) | |
444 return false; | |
445 #endif | |
446 | |
447 AddGenericDllEvictionPolicy(policy); | |
448 AddGpuDllEvictionPolicy(policy); | |
449 | |
450 if (cmd_line->HasSwitch(switches::kEnableLogging)) { | |
451 string16 log_file_path = logging::GetLogFileFullPath(); | |
452 if (!log_file_path.empty()) { | |
453 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, | |
454 sandbox::TargetPolicy::FILES_ALLOW_ANY, | |
455 log_file_path.c_str()); | |
456 if (result != sandbox::SBOX_ALL_OK) | |
457 return false; | |
458 } | |
459 } | |
460 #endif | |
461 return true; | |
462 } | |
463 | |
464 bool AddPolicyForRenderer(sandbox::TargetPolicy* policy) { | |
465 // Renderers need to copy sections for plugin DIBs and GPU. | |
466 sandbox::ResultCode result; | 336 sandbox::ResultCode result; |
467 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | |
468 sandbox::TargetPolicy::HANDLES_DUP_ANY, | |
469 L"Section"); | |
470 if (result != sandbox::SBOX_ALL_OK) | |
471 return false; | |
472 | |
473 // Renderers need to share events with plugins. | 337 // Renderers need to share events with plugins. |
474 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | 338 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, |
475 sandbox::TargetPolicy::HANDLES_DUP_ANY, | 339 sandbox::TargetPolicy::HANDLES_DUP_ANY, |
476 L"Event"); | 340 L"Event"); |
477 if (result != sandbox::SBOX_ALL_OK) | 341 if (result != sandbox::SBOX_ALL_OK) |
478 return false; | 342 return false; |
479 | 343 |
480 // Renderers need to send named pipe handles and shared memory | |
481 // segment handles to NaCl loader processes. | |
482 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES, | |
483 sandbox::TargetPolicy::HANDLES_DUP_ANY, | |
484 L"File"); | |
485 if (result != sandbox::SBOX_ALL_OK) | |
486 return false; | |
487 | |
488 sandbox::TokenLevel initial_token = sandbox::USER_UNPROTECTED; | 344 sandbox::TokenLevel initial_token = sandbox::USER_UNPROTECTED; |
489 if (base::win::GetVersion() > base::win::VERSION_XP) { | 345 if (base::win::GetVersion() > base::win::VERSION_XP) { |
490 // On 2003/Vista the initial token has to be restricted if the main | 346 // On 2003/Vista the initial token has to be restricted if the main |
491 // token is restricted. | 347 // token is restricted. |
492 initial_token = sandbox::USER_RESTRICTED_SAME_ACCESS; | 348 initial_token = sandbox::USER_RESTRICTED_SAME_ACCESS; |
493 } | 349 } |
494 | 350 |
495 policy->SetTokenLevel(initial_token, sandbox::USER_LOCKDOWN); | 351 policy->SetTokenLevel(initial_token, sandbox::USER_LOCKDOWN); |
496 // Prevents the renderers from manipulating low-integrity processes. | 352 // Prevents the renderers from manipulating low-integrity processes. |
497 policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_UNTRUSTED); | 353 policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_UNTRUSTED); |
498 | 354 |
499 bool use_winsta = !CommandLine::ForCurrentProcess()->HasSwitch( | 355 bool use_winsta = !CommandLine::ForCurrentProcess()->HasSwitch( |
500 switches::kDisableAltWinstation); | 356 switches::kDisableAltWinstation); |
501 | 357 |
502 if (sandbox::SBOX_ALL_OK != policy->SetAlternateDesktop(use_winsta)) { | 358 if (sandbox::SBOX_ALL_OK != policy->SetAlternateDesktop(use_winsta)) { |
503 DLOG(WARNING) << "Failed to apply desktop security to the renderer"; | 359 DLOG(WARNING) << "Failed to apply desktop security to the renderer"; |
504 } | 360 } |
505 | 361 |
506 AddGenericDllEvictionPolicy(policy); | |
507 | |
508 return true; | 362 return true; |
509 } | 363 } |
510 | 364 |
511 // The Pepper process as locked-down as a renderer execpt that it can | |
512 // create the server side of chrome pipes. | |
513 bool AddPolicyForPepperPlugin(sandbox::TargetPolicy* policy) { | |
514 sandbox::ResultCode result; | |
515 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, | |
516 sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, | |
517 L"\\\\.\\pipe\\chrome.*"); | |
518 return result == sandbox::SBOX_ALL_OK; | |
519 } | |
520 | |
521 // This code is test only, and attempts to catch unsafe uses of | 365 // This code is test only, and attempts to catch unsafe uses of |
522 // DuplicateHandle() that copy privileged handles into sandboxed processes. | 366 // DuplicateHandle() that copy privileged handles into sandboxed processes. |
523 #ifndef OFFICIAL_BUILD | 367 #ifndef OFFICIAL_BUILD |
524 base::win::IATPatchFunction g_iat_patch_duplicate_handle; | 368 base::win::IATPatchFunction g_iat_patch_duplicate_handle; |
525 | 369 |
526 BOOL (WINAPI *g_iat_orig_duplicate_handle)(HANDLE source_process_handle, | 370 BOOL (WINAPI *g_iat_orig_duplicate_handle)(HANDLE source_process_handle, |
527 HANDLE source_handle, | 371 HANDLE source_handle, |
528 HANDLE target_process_handle, | 372 HANDLE target_process_handle, |
529 LPHANDLE target_handle, | 373 LPHANDLE target_handle, |
530 DWORD desired_access, | 374 DWORD desired_access, |
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611 // Callers use CHECK macro to make sure we get the right stack. | 455 // Callers use CHECK macro to make sure we get the right stack. |
612 CheckDuplicateHandle(handle); | 456 CheckDuplicateHandle(handle); |
613 } | 457 } |
614 | 458 |
615 return TRUE; | 459 return TRUE; |
616 } | 460 } |
617 #endif | 461 #endif |
618 | 462 |
619 } // namespace | 463 } // namespace |
620 | 464 |
621 namespace content { | 465 void SetJobLevel(const CommandLine& cmd_line, |
466 sandbox::JobLevel job_level, | |
467 uint32 ui_exceptions, | |
468 sandbox::TargetPolicy* policy) { | |
469 if (ShouldSetJobLevel(cmd_line)) | |
470 policy->SetJobLevel(job_level, ui_exceptions); | |
471 else | |
472 policy->SetJobLevel(sandbox::JOB_NONE, 0); | |
473 } | |
474 | |
475 // TODO(jschuh): Need get these restrictions applied to NaCl and Pepper. | |
476 // Just have to figure out what needs to be warmed up first. | |
477 void AddBaseHandleClosePolicy(sandbox::TargetPolicy* policy) { | |
478 // Being able to manipulate anything BaseNamedObjects is bad. | |
479 string16 object_path = PrependWindowsSessionPath(L"\\BaseNamedObjects"); | |
480 policy->AddKernelObjectToClose(L"Directory", object_path.data()); | |
481 object_path = PrependWindowsSessionPath( | |
482 L"\\BaseNamedObjects\\windows_shell_global_counters"); | |
483 policy->AddKernelObjectToClose(L"Section", object_path.data()); | |
484 } | |
622 | 485 |
623 bool InitBrokerServices(sandbox::BrokerServices* broker_services) { | 486 bool InitBrokerServices(sandbox::BrokerServices* broker_services) { |
624 // TODO(abarth): DCHECK(CalledOnValidThread()); | 487 // TODO(abarth): DCHECK(CalledOnValidThread()); |
625 // See <http://b/1287166>. | 488 // See <http://b/1287166>. |
626 DCHECK(broker_services); | 489 DCHECK(broker_services); |
627 DCHECK(!g_broker_services); | 490 DCHECK(!g_broker_services); |
628 sandbox::ResultCode result = broker_services->Init(); | 491 sandbox::ResultCode result = broker_services->Init(); |
629 g_broker_services = broker_services; | 492 g_broker_services = broker_services; |
630 | 493 |
631 // In non-official builds warn about dangerous uses of DuplicateHandle. | 494 // In non-official builds warn about dangerous uses of DuplicateHandle. |
632 BOOL is_in_job = FALSE; | 495 BOOL is_in_job = FALSE; |
633 #ifdef NACL_WIN64 | 496 #ifdef NACL_WIN64 |
634 CHECK(::IsProcessInJob(::GetCurrentProcess(), NULL, &is_in_job)); | 497 CHECK(::IsProcessInJob(::GetCurrentProcess(), NULL, &is_in_job)); |
635 #endif | 498 #endif |
636 #ifndef OFFICIAL_BUILD | 499 #ifndef OFFICIAL_BUILD |
637 if (!is_in_job && !g_iat_patch_duplicate_handle.is_patched()) { | 500 if (!is_in_job && !g_iat_patch_duplicate_handle.is_patched()) { |
638 HMODULE module = NULL; | 501 HMODULE module = NULL; |
639 wchar_t module_name[MAX_PATH]; | 502 wchar_t module_name[MAX_PATH]; |
640 CHECK(::GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, | 503 CHECK(::GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, |
641 reinterpret_cast<LPCWSTR>(InitBrokerServices), | 504 reinterpret_cast<LPCWSTR>(InitBrokerServices), |
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655 } | 518 } |
656 | 519 |
657 bool InitTargetServices(sandbox::TargetServices* target_services) { | 520 bool InitTargetServices(sandbox::TargetServices* target_services) { |
658 DCHECK(target_services); | 521 DCHECK(target_services); |
659 DCHECK(!g_target_services); | 522 DCHECK(!g_target_services); |
660 sandbox::ResultCode result = target_services->Init(); | 523 sandbox::ResultCode result = target_services->Init(); |
661 g_target_services = target_services; | 524 g_target_services = target_services; |
662 return sandbox::SBOX_ALL_OK == result; | 525 return sandbox::SBOX_ALL_OK == result; |
663 } | 526 } |
664 | 527 |
665 base::ProcessHandle StartProcessWithAccess(CommandLine* cmd_line, | 528 base::ProcessHandle StartSandboxedProcess( |
666 const base::FilePath& exposed_dir) { | 529 SandboxedProcessLauncherDelegate* delegate, |
530 CommandLine* cmd_line) { | |
667 const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); | 531 const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess(); |
668 ProcessType type; | 532 ProcessType type; |
669 std::string type_str = cmd_line->GetSwitchValueASCII(switches::kProcessType); | 533 std::string type_str = cmd_line->GetSwitchValueASCII(switches::kProcessType); |
670 if (type_str == switches::kRendererProcess) { | 534 if (type_str == switches::kRendererProcess) { |
671 type = PROCESS_TYPE_RENDERER; | 535 type = PROCESS_TYPE_RENDERER; |
672 } else if (type_str == switches::kPluginProcess) { | 536 } else if (type_str == switches::kPluginProcess) { |
673 type = PROCESS_TYPE_PLUGIN; | 537 type = PROCESS_TYPE_PLUGIN; |
674 } else if (type_str == switches::kWorkerProcess) { | 538 } else if (type_str == switches::kWorkerProcess) { |
675 type = PROCESS_TYPE_WORKER; | 539 type = PROCESS_TYPE_WORKER; |
676 } else if (type_str == switches::kNaClLoaderProcess) { | 540 } else if (type_str == switches::kNaClLoaderProcess) { |
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766 return 0; | 630 return 0; |
767 | 631 |
768 mitigations = sandbox::MITIGATION_STRICT_HANDLE_CHECKS | | 632 mitigations = sandbox::MITIGATION_STRICT_HANDLE_CHECKS | |
769 sandbox::MITIGATION_DLL_SEARCH_ORDER; | 633 sandbox::MITIGATION_DLL_SEARCH_ORDER; |
770 | 634 |
771 if (policy->SetDelayedProcessMitigations(mitigations) != sandbox::SBOX_ALL_OK) | 635 if (policy->SetDelayedProcessMitigations(mitigations) != sandbox::SBOX_ALL_OK) |
772 return 0; | 636 return 0; |
773 | 637 |
774 SetJobLevel(*cmd_line, sandbox::JOB_LOCKDOWN, 0, policy); | 638 SetJobLevel(*cmd_line, sandbox::JOB_LOCKDOWN, 0, policy); |
775 | 639 |
776 if (type == PROCESS_TYPE_GPU) { | 640 bool disable_default_policy = false; |
777 if (!AddPolicyForGPU(cmd_line, policy)) | 641 base::FilePath exposed_dir; |
778 return 0; | 642 if (delegate) |
779 } else { | 643 delegate->PreSandbox(&disable_default_policy, &exposed_dir); |
780 if (!AddPolicyForRenderer(policy)) | |
781 return 0; | |
782 // TODO(jschuh): Need get these restrictions applied to NaCl and Pepper. | |
783 // Just have to figure out what needs to be warmed up first. | |
784 if (type == PROCESS_TYPE_RENDERER || | |
785 type == PROCESS_TYPE_WORKER) { | |
786 AddBaseHandleClosePolicy(policy); | |
787 // Pepper uses the renderer's policy, whith some tweaks. | |
788 } else if (type == PROCESS_TYPE_PPAPI_PLUGIN) { | |
789 if (!AddPolicyForPepperPlugin(policy)) | |
790 return 0; | |
791 } | |
792 | 644 |
645 if (!disable_default_policy && !AddPolicyForSandboxedProcess(policy)) | |
646 return 0; | |
793 | 647 |
794 if (type_str != switches::kRendererProcess) { | 648 if (type_str != switches::kRendererProcess) { |
795 // Hack for Google Desktop crash. Trick GD into not injecting its DLL into | 649 // Hack for Google Desktop crash. Trick GD into not injecting its DLL into |
796 // this subprocess. See | 650 // this subprocess. See |
797 // http://code.google.com/p/chromium/issues/detail?id=25580 | 651 // http://code.google.com/p/chromium/issues/detail?id=25580 |
798 cmd_line->AppendSwitchASCII("ignored", " --type=renderer "); | 652 cmd_line->AppendSwitchASCII("ignored", " --type=renderer "); |
799 } | |
800 } | 653 } |
801 | 654 |
802 sandbox::ResultCode result; | 655 sandbox::ResultCode result; |
803 if (!exposed_dir.empty()) { | 656 if (!exposed_dir.empty()) { |
804 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, | 657 result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, |
805 sandbox::TargetPolicy::FILES_ALLOW_ANY, | 658 sandbox::TargetPolicy::FILES_ALLOW_ANY, |
806 exposed_dir.value().c_str()); | 659 exposed_dir.value().c_str()); |
807 if (result != sandbox::SBOX_ALL_OK) | 660 if (result != sandbox::SBOX_ALL_OK) |
808 return 0; | 661 return 0; |
809 | 662 |
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820 return 0; | 673 return 0; |
821 } | 674 } |
822 | 675 |
823 if (browser_command_line.HasSwitch(switches::kEnableLogging)) { | 676 if (browser_command_line.HasSwitch(switches::kEnableLogging)) { |
824 // If stdout/stderr point to a Windows console, these calls will | 677 // If stdout/stderr point to a Windows console, these calls will |
825 // have no effect. | 678 // have no effect. |
826 policy->SetStdoutHandle(GetStdHandle(STD_OUTPUT_HANDLE)); | 679 policy->SetStdoutHandle(GetStdHandle(STD_OUTPUT_HANDLE)); |
827 policy->SetStderrHandle(GetStdHandle(STD_ERROR_HANDLE)); | 680 policy->SetStderrHandle(GetStdHandle(STD_ERROR_HANDLE)); |
828 } | 681 } |
829 | 682 |
683 if (delegate) { | |
684 bool success = true; | |
685 delegate->PreSpawnTarget(policy, &success); | |
686 if (!success) | |
687 return 0; | |
688 } | |
689 | |
830 TRACE_EVENT_BEGIN_ETW("StartProcessWithAccess::LAUNCHPROCESS", 0, 0); | 690 TRACE_EVENT_BEGIN_ETW("StartProcessWithAccess::LAUNCHPROCESS", 0, 0); |
831 | 691 |
832 result = g_broker_services->SpawnTarget( | 692 result = g_broker_services->SpawnTarget( |
833 cmd_line->GetProgram().value().c_str(), | 693 cmd_line->GetProgram().value().c_str(), |
834 cmd_line->GetCommandLineString().c_str(), | 694 cmd_line->GetCommandLineString().c_str(), |
835 policy, target.Receive()); | 695 policy, target.Receive()); |
836 policy->Release(); | 696 policy->Release(); |
837 | 697 |
838 TRACE_EVENT_END_ETW("StartProcessWithAccess::LAUNCHPROCESS", 0, 0); | 698 TRACE_EVENT_END_ETW("StartProcessWithAccess::LAUNCHPROCESS", 0, 0); |
839 | 699 |
840 if (sandbox::SBOX_ALL_OK != result) { | 700 if (sandbox::SBOX_ALL_OK != result) { |
841 DLOG(ERROR) << "Failed to launch process. Error: " << result; | 701 DLOG(ERROR) << "Failed to launch process. Error: " << result; |
842 return 0; | 702 return 0; |
843 } | 703 } |
844 | 704 |
845 #if !defined(NACL_WIN64) | 705 if (delegate) |
846 // For Native Client sel_ldr processes on 32-bit Windows, reserve 1 GB of | 706 delegate->PostSpawnTarget(target.process_handle()); |
847 // address space to prevent later failure due to address space fragmentation | 707 |
848 // from .dll loading. The NaCl process will attempt to locate this space by | |
849 // scanning the address space using VirtualQuery. | |
850 // TODO(bbudge) Handle the --no-sandbox case. | |
851 // http://code.google.com/p/nativeclient/issues/detail?id=2131 | |
852 if (type == PROCESS_TYPE_NACL_LOADER) { | |
853 const SIZE_T kOneGigabyte = 1 << 30; | |
854 void* nacl_mem = VirtualAllocEx(target.process_handle(), | |
855 NULL, | |
856 kOneGigabyte, | |
857 MEM_RESERVE, | |
858 PAGE_NOACCESS); | |
859 if (!nacl_mem) { | |
860 DLOG(WARNING) << "Failed to reserve address space for Native Client"; | |
861 } | |
862 } | |
863 #endif // !defined(NACL_WIN64) | |
864 | 708 |
865 ResumeThread(target.thread_handle()); | 709 ResumeThread(target.thread_handle()); |
866 | 710 |
867 // Help the process a little. It can't start the debugger by itself if | 711 // Help the process a little. It can't start the debugger by itself if |
868 // the process is in a sandbox. | 712 // the process is in a sandbox. |
869 if (child_needs_help) | 713 if (child_needs_help) |
870 base::debug::SpawnDebuggerOnProcess(target.process_id()); | 714 base::debug::SpawnDebuggerOnProcess(target.process_id()); |
871 | 715 |
872 return target.TakeProcessHandle(); | 716 return target.TakeProcessHandle(); |
873 } | 717 } |
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904 } | 748 } |
905 | 749 |
906 return false; | 750 return false; |
907 } | 751 } |
908 | 752 |
909 bool BrokerAddTargetPeer(HANDLE peer_process) { | 753 bool BrokerAddTargetPeer(HANDLE peer_process) { |
910 return g_broker_services->AddTargetPeer(peer_process) == sandbox::SBOX_ALL_OK; | 754 return g_broker_services->AddTargetPeer(peer_process) == sandbox::SBOX_ALL_OK; |
911 } | 755 } |
912 | 756 |
913 } // namespace content | 757 } // namespace content |
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