| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/sandbox_policy.h" |
| |
| #include "base/file_util.h" |
| #include "base/logging.h" |
| #include "base/path_service.h" |
| #include "base/registry.h" |
| #include "base/string_util.h" |
| #include "base/win_util.h" |
| #include "chrome/common/chrome_constants.h" |
| #include "chrome/common/chrome_paths.h" |
| #include "chrome/common/ipc_logging.h" |
| #include "chrome/common/win_util.h" |
| #include "webkit/glue/plugins/plugin_list.h" |
| |
| namespace { |
| |
| // The DLLs listed here are known (or under strong suspicion) of causing crashes |
| // when they are loaded in the renderer. |
| const wchar_t* const kTroublesomeDlls[] = { |
| L"adialhk.dll", // Kaspersky Internet Security. |
| L"acpiz.dll", // Unknown. |
| L"avgrsstx.dll", // AVG 8. |
| L"btkeyind.dll", // Widcomm Bluetooth. |
| L"cmcsyshk.dll", // CMC Internet Security. |
| L"dockshellhook.dll", // Stardock Objectdock. |
| L"GoogleDesktopNetwork3.DLL", // Google Desktop Search v5. |
| L"fwhook.dll", // PC Tools Firewall Plus. |
| L"hookprocesscreation.dll", // Blumentals Program protector. |
| L"hookterminateapis.dll", // Blumentals and Cyberprinter. |
| L"hookprintapis.dll", // Cyberprinter. |
| L"imon.dll", // NOD32 Antivirus. |
| L"ioloHL.dll", // Iolo (System Mechanic). |
| L"kloehk.dll", // Kaspersky Internet Security. |
| L"lawenforcer.dll", // Spyware-Browser AntiSpyware (Spybro). |
| L"libdivx.dll", // DivX. |
| L"lvprcinj01.dll", // Logitech QuickCam. |
| L"madchook.dll", // Madshi (generic hooking library). |
| L"mdnsnsp.dll", // Bonjour. |
| L"moonsysh.dll", // Moon Secure Antivirus. |
| L"npdivx32.dll", // DivX. |
| L"npggNT.des", // GameGuard 2008. |
| L"npggNT.dll", // GameGuard (older). |
| L"oawatch.dll", // Online Armor. |
| L"pavhook.dll", // Panda Internet Security. |
| L"pavshook.dll", // Panda Antivirus. |
| L"pctavhook.dll", // PC Tools Antivirus. |
| L"prntrack.dll", // Pharos Systems. |
| L"radhslib.dll", // Radiant Naomi Internet Filter. |
| L"radprlib.dll", // Radiant Naomi Internet Filter. |
| L"rlhook.dll", // Trustware Bufferzone. |
| L"r3hook.dll", // Kaspersky Internet Security. |
| L"sahook.dll", // McAfee Site Advisor. |
| L"sbrige.dll", // Unknown. |
| L"sc2hook.dll", // Supercopier 2. |
| L"sguard.dll", // Iolo (System Guard). |
| L"smumhook.dll", // Spyware Doctor version 5 and above. |
| L"ssldivx.dll", // DivX. |
| L"syncor11.dll", // SynthCore Midi interface. |
| L"systools.dll", // Panda Antivirus. |
| L"tfwah.dll", // Threatfire (PC tools). |
| L"wblind.dll", // Stardock Object desktop. |
| L"wbhelp.dll", // Stardock Object desktop. |
| L"winstylerthemehelper.dll" // Tuneup utilities 2006. |
| }; |
| |
| } // namespace |
| |
| PluginPolicyCategory GetPolicyCategoryForPlugin( |
| const FilePath& dll, |
| const std::wstring& clsid, |
| const std::wstring& list) { |
| std::wstring filename = dll.BaseName().value(); |
| std::wstring plugin_dll = StringToLowerASCII(filename); |
| std::wstring trusted_plugins = StringToLowerASCII(list); |
| std::wstring activex_clsid = StringToLowerASCII(clsid); |
| |
| size_t pos = 0; |
| size_t end_item = 0; |
| while (end_item != std::wstring::npos) { |
| end_item = list.find(L",", pos); |
| |
| size_t size_item = (end_item == std::wstring::npos) ? end_item : |
| end_item - pos; |
| std::wstring item = list.substr(pos, size_item); |
| if (!item.empty()) { |
| if (item == activex_clsid || item == plugin_dll) |
| return PLUGIN_GROUP_TRUSTED; |
| } |
| |
| pos = end_item + 1; |
| } |
| |
| return PLUGIN_GROUP_UNTRUSTED; |
| } |
| |
| // Adds the policy rules for the path and path\* with the semantic |access|. |
| // We need to add the wildcard rules to also apply the rule to the subfiles |
| // and subfolders. |
| bool AddDirectoryAndChildren(int path, const wchar_t* sub_dir, |
| sandbox::TargetPolicy::Semantics access, |
| sandbox::TargetPolicy* policy) { |
| std::wstring directory; |
| if (!PathService::Get(path, &directory)) |
| return false; |
| |
| if (sub_dir) |
| file_util::AppendToPath(&directory, sub_dir); |
| |
| sandbox::ResultCode result; |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, access, |
| directory.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| file_util::AppendToPath(&directory, L"*"); |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, access, |
| directory.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| return true; |
| } |
| |
| // Adds the policy rules for the path and path\* with the semantic |access|. |
| // We need to add the wildcard rules to also apply the rule to the subkeys. |
| bool AddKeyAndSubkeys(std::wstring key, |
| sandbox::TargetPolicy::Semantics access, |
| sandbox::TargetPolicy* policy) { |
| sandbox::ResultCode result; |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_REGISTRY, access, |
| key.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| key += L"\\*"; |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_REGISTRY, access, |
| key.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| return true; |
| } |
| |
| // Eviction of injected DLLs is done by the sandbox so that the injected module |
| // does not get a chance to execute any code. |
| bool AddDllEvictionPolicy(sandbox::TargetPolicy* policy) { |
| for (int ix = 0; ix != arraysize(kTroublesomeDlls); ++ix) { |
| // To minimize the list we only add an unload policy if the dll is also |
| // loaded in this process. All the injected dlls of interest do this. |
| if (::GetModuleHandleW(kTroublesomeDlls[ix])) { |
| LOG(WARNING) << "dll to unload found: " << kTroublesomeDlls[ix]; |
| if (sandbox::SBOX_ALL_OK != policy->AddDllToUnload(kTroublesomeDlls[ix])) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool AddPolicyForGearsInRenderer(sandbox::TargetPolicy* policy) { |
| sandbox::ResultCode result; |
| |
| // TODO(mpcomplete): need to restrict access to database files only. This |
| // is just temporary for debugging purposes. |
| std::wstring plugin_data; |
| if (!PathService::Get(chrome::DIR_USER_DATA, &plugin_data)) |
| return false; |
| if (!win_util::ConvertToLongPath(plugin_data, &plugin_data)) |
| return false; |
| |
| file_util::AppendToPath(&plugin_data, L"*"); |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, |
| plugin_data.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| std::wstring temppath; |
| if (!file_util::GetTempDir(&temppath)) |
| return false; |
| file_util::AppendToPath(&temppath, L"*"); |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, |
| temppath.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| return true; |
| } |
| |
| bool AddGenericPolicy(sandbox::TargetPolicy* policy) { |
| sandbox::ResultCode result; |
| |
| // Add the policy for the pipes |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, |
| L"\\??\\pipe\\chrome.*"); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| #ifdef IPC_MESSAGE_LOG_ENABLED |
| // Add the policy for the IPC logging events. |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_SYNC, |
| sandbox::TargetPolicy::EVENTS_ALLOW_ANY, |
| IPC::Logging::GetEventName(true).c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_SYNC, |
| sandbox::TargetPolicy::EVENTS_ALLOW_ANY, |
| IPC::Logging::GetEventName(false).c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| #endif |
| |
| // Add the policy for debug message only in debug |
| #ifndef NDEBUG |
| std::wstring debug_message; |
| if (!PathService::Get(chrome::DIR_APP, &debug_message)) |
| return false; |
| if (!win_util::ConvertToLongPath(debug_message, &debug_message)) |
| return false; |
| file_util::AppendToPath(&debug_message, L"debug_message.exe"); |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_PROCESS, |
| sandbox::TargetPolicy::PROCESS_MIN_EXEC, |
| debug_message.c_str()); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| #endif // NDEBUG |
| |
| return true; |
| } |
| |
| bool ApplyPolicyForTrustedPlugin(sandbox::TargetPolicy* policy) { |
| policy->SetJobLevel(sandbox::JOB_UNPROTECTED, 0); |
| policy->SetTokenLevel(sandbox::USER_UNPROTECTED, sandbox::USER_UNPROTECTED); |
| return true; |
| } |
| |
| bool ApplyPolicyForUntrustedPlugin(sandbox::TargetPolicy* policy) { |
| policy->SetJobLevel(sandbox::JOB_UNPROTECTED, 0); |
| |
| sandbox::TokenLevel initial_token = sandbox::USER_UNPROTECTED; |
| if (win_util::GetWinVersion() > win_util::WINVERSION_XP) { |
| // On 2003/Vista the initial token has to be restricted if the main token |
| // is restricted. |
| initial_token = sandbox::USER_RESTRICTED_SAME_ACCESS; |
| } |
| policy->SetTokenLevel(initial_token, sandbox::USER_LIMITED); |
| policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_LOW); |
| |
| if (!AddDirectoryAndChildren(base::DIR_TEMP, NULL, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, policy)) |
| return false; |
| |
| if (!AddDirectoryAndChildren(base::DIR_IE_INTERNET_CACHE, NULL, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, policy)) |
| return false; |
| |
| |
| if (!AddDirectoryAndChildren(base::DIR_APP_DATA, NULL, |
| sandbox::TargetPolicy::FILES_ALLOW_READONLY, |
| policy)) |
| return false; |
| |
| if (!AddDirectoryAndChildren(base::DIR_APP_DATA, L"Macromedia", |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, |
| policy)) |
| return false; |
| |
| if (!AddDirectoryAndChildren(base::DIR_LOCAL_APP_DATA, NULL, |
| sandbox::TargetPolicy::FILES_ALLOW_READONLY, |
| policy)) |
| return false; |
| |
| if (!AddKeyAndSubkeys(L"HKEY_CURRENT_USER\\SOFTWARE\\MACROMEDIA", |
| sandbox::TargetPolicy::REG_ALLOW_ANY, |
| policy)) |
| return false; |
| |
| if (win_util::GetWinVersion() == win_util::WINVERSION_VISTA) { |
| if (!AddKeyAndSubkeys(L"HKEY_CURRENT_USER\\SOFTWARE\\AppDataLow", |
| sandbox::TargetPolicy::REG_ALLOW_ANY, |
| policy)) |
| return false; |
| |
| if (!AddDirectoryAndChildren(base::DIR_LOCAL_APP_DATA_LOW, NULL, |
| sandbox::TargetPolicy::FILES_ALLOW_ANY, |
| policy)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool AddPolicyForPlugin(const FilePath &plugin_dll, |
| const std::string &activex_clsid, |
| const std::wstring &trusted_plugins, |
| sandbox::TargetPolicy* policy) { |
| // Add the policy for the pipes. |
| sandbox::ResultCode result = sandbox::SBOX_ALL_OK; |
| result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_NAMED_PIPES, |
| sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY, |
| L"\\\\.\\pipe\\chrome.*"); |
| if (result != sandbox::SBOX_ALL_OK) |
| return false; |
| |
| std::wstring clsid = UTF8ToWide(activex_clsid); |
| |
| PluginPolicyCategory policy_category = |
| GetPolicyCategoryForPlugin(plugin_dll, clsid, trusted_plugins); |
| |
| switch (policy_category) { |
| case PLUGIN_GROUP_TRUSTED: |
| return ApplyPolicyForTrustedPlugin(policy); |
| case PLUGIN_GROUP_UNTRUSTED: |
| return ApplyPolicyForUntrustedPlugin(policy); |
| default: |
| NOTREACHED(); |
| break; |
| } |
| |
| return false; |
| } |