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Bug 1083344 - Tighten rules for Mac OS content process sandbox - "core part". r=smichaud

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extra : histedit_source : 3c904474c57dbf086365cc6b26a55c34b2b449ae
This commit is contained in:
André Reinald 2015-02-18 14:10:27 +01:00
parent ffe59cf419
commit 70a296a23b
3 changed files with 45 additions and 3 deletions
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12
browser/app/profile/firefox.js
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@ -1214,6 +1214,18 @@ pref("security.sandbox.windows.log.stackTraceDepth", 0);
#endif
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX) && defined(MOZ_CONTENT_SANDBOX)
// This pref is discussed in bug 1083344, the naming is inspired from its Windows
// counterpart, but on Mac it's an integer which means:
// 0 -> "no sandbox"
// 1 -> "an imperfect sandbox designed to allow firefox to run reasonably well"
// 2 -> "an ideal sandbox which may break many things"
// This setting is read when the content process is started. On Mac the content
// process is killed when all windows are closed, so a change will take effect
// when the 1st window is opened. It was decided to default this setting to 1.
pref("security.sandbox.macos.content.moreStrict", 1);
#endif
// This pref governs whether we attempt to work around problems caused by
// plugins using OS calls to manipulate the cursor while running out-of-
// process. These workarounds all involve intercepting (hooking) certain

35
dom/ipc/ContentChild.cpp
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@ -93,6 +93,8 @@
#include "nsISpellChecker.h"
#include "nsClipboardProxy.h"
#include "nsISystemMessageCache.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "IHistory.h"
#include "nsNetUtil.h"
@ -1081,8 +1083,11 @@ ContentChild::CleanUpSandboxEnvironment()
#endif
#if defined(XP_MACOSX) && defined(MOZ_CONTENT_SANDBOX)
#include <stdlib.h>
static bool
GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath)
GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath, nsCString &aAppDir)
{
nsAutoCString appPath;
nsAutoCString appBinaryPath(
@ -1112,6 +1117,23 @@ GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath)
return false;
}
nsCOMPtr<nsIFile> appDir;
nsCOMPtr<nsIProperties> dirSvc =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID);
if (!dirSvc) {
return false;
}
rv = dirSvc->Get(NS_XPCOM_CURRENT_PROCESS_DIR,
NS_GET_IID(nsIFile), getter_AddRefs(appDir));
if (NS_FAILED(rv)) {
return false;
}
bool exists;
rv = appDir->Exists(&exists);
if (NS_FAILED(rv) || !exists) {
return false;
}
bool isLink;
app->IsSymlink(&isLink);
if (isLink) {
@ -1125,6 +1147,12 @@ GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath)
} else {
appBinary->GetNativePath(aAppBinaryPath);
}
appDir->IsSymlink(&isLink);
if (isLink) {
appDir->GetNativeTarget(aAppDir);
} else {
appDir->GetNativePath(aAppDir);
}
return true;
}
@ -1132,8 +1160,8 @@ GetAppPaths(nsCString &aAppPath, nsCString &aAppBinaryPath)
static void
StartMacOSContentSandbox()
{
nsAutoCString appPath, appBinaryPath;
if (!GetAppPaths(appPath, appBinaryPath)) {
nsAutoCString appPath, appBinaryPath, appDir;
if (!GetAppPaths(appPath, appBinaryPath, appDir)) {
MOZ_CRASH("Error resolving child process path");
}
@ -1141,6 +1169,7 @@ StartMacOSContentSandbox()
info.type = MacSandboxType_Content;
info.appPath.Assign(appPath);
info.appBinaryPath.Assign(appBinaryPath);
info.appDir.Assign(appDir);
nsAutoCString err;
if (!mozilla::StartMacSandbox(info, err)) {

1
security/sandbox/mac/Sandbox.h
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@ -38,6 +38,7 @@ typedef struct _MacSandboxInfo {
MacSandboxPluginInfo pluginInfo;
nsCString appPath;
nsCString appBinaryPath;
nsCString appDir;
} MacSandboxInfo;
namespace mozilla {