VeraCrypt
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-rw-r--r--src/Common/Apidrvr.h2
-rw-r--r--src/Common/Dlgcode.c129
-rw-r--r--src/Common/Dlgcode.h4
-rw-r--r--src/Common/Tcdefs.h4
4 files changed, 136 insertions, 3 deletions
diff --git a/src/Common/Apidrvr.h b/src/Common/Apidrvr.h
index 7a3ea868..463d4fa6 100644
--- a/src/Common/Apidrvr.h
+++ b/src/Common/Apidrvr.h
@@ -418,6 +418,8 @@ typedef struct
#define VC_ERASE_KEYS_SHUTDOWN DRIVER_STR("VeraCryptEraseKeysShutdown")
+#define VC_ENABLE_MEMORY_PROTECTION DRIVER_STR("VeraCryptEnableMemoryProtection")
+
// WARNING: Modifying the following values can introduce incompatibility with previous versions.
#define TC_DRIVER_CONFIG_CACHE_BOOT_PASSWORD 0x1
#define TC_DRIVER_CONFIG_CACHE_BOOT_PASSWORD_FOR_SYS_FAVORITES 0x2
diff --git a/src/Common/Dlgcode.c b/src/Common/Dlgcode.c
index 7282b2ec..8f357208 100644
--- a/src/Common/Dlgcode.c
+++ b/src/Common/Dlgcode.c
@@ -32,6 +32,9 @@
#include <process.h>
#include <Tlhelp32.h>
#endif
+#ifdef _WIN32_WINNT >= 0x0602
+#include "processthreadsapi.h""
+#endif
#include "Resource.h"
@@ -216,6 +219,9 @@ volatile BOOL NeedPeriodicDeviceListUpdate = FALSE;
BOOL DisablePeriodicDeviceListUpdate = FALSE;
BOOL EnableMemoryProtection = FALSE;
+BOOL MemoryProtectionActivated = FALSE;
+BOOL ProcessMitigationsActivated = FALSE;
+
BOOL WaitDialogDisplaying = FALSE;
/* Handle to the device driver */
@@ -3238,6 +3244,17 @@ uint32 ReadEncryptionThreadPoolFreeCpuCountLimit ()
return count;
}
+BOOL ReadMemoryProtectionConfig ()
+{
+ DWORD config;
+
+ if (!ReadLocalMachineRegistryDword (L"SYSTEM\\CurrentControlSet\\Services\\veracrypt", VC_ENABLE_MEMORY_PROTECTION, &config))
+ {
+ // enabled by default
+ config = 1;
+ }
+ return (config)? TRUE: FALSE;
+}
BOOL LoadSysEncSettings ()
{
@@ -3431,6 +3448,17 @@ extern "C" {
// Force loading dlls from system32 directory only
SetDefaultDllDirectoriesFn (LOAD_LIBRARY_SEARCH_SYSTEM32);
}
+
+ // activate process mitigations (currently only ASLR, dynamic code and extensions points)
+ ActivateProcessMitigations();
+
+#ifndef SETUP
+ // call ActivateMemoryProtection if corresponding setting has been enabled (default is enabled)
+ if (ReadMemoryProtectionConfig())
+ {
+ ActivateMemoryProtection();
+ }
+#endif
return wWinMainCRTStartup();
}
}
@@ -14035,7 +14063,7 @@ BOOL BufferHasPattern (const unsigned char* buffer, size_t bufferLen, const void
*
* Reduce current user acess rights for this process to the minimum in order to forbid non-admin users from reading the process memory.
*/
-BOOL EnableProcessProtection()
+BOOL ActivateMemoryProtection()
{
BOOL bSuccess = FALSE;
@@ -14050,7 +14078,10 @@ BOOL EnableProcessProtection()
// Acces mask
DWORD dwAccessMask = SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION | PROCESS_TERMINATE; // same as protected process
-
+
+ if (MemoryProtectionActivated)
+ return TRUE;
+
if (IsAdmin ())
{
// if we are running elevated, we allow CreateProcessXXX calls alongside PROCESS_DUP_HANDLE and PROCESS_QUERY_INFORMATION in order to be able
@@ -14113,6 +14144,9 @@ BOOL EnableProcessProtection()
NULL // do not change SACL
))? TRUE: FALSE;
+ if (bSuccess)
+ MemoryProtectionActivated = TRUE;
+
Cleanup:
if (pACL != NULL) {
@@ -14128,6 +14162,97 @@ Cleanup:
return bSuccess;
}
+// define missing structures Windows 8
+#if (_WIN32_WINNT < 0x0602)
+
+typedef struct _PROCESS_MITIGATION_ASLR_POLICY {
+ union {
+ DWORD Flags;
+ struct {
+ DWORD EnableBottomUpRandomization : 1;
+ DWORD EnableForceRelocateImages : 1;
+ DWORD EnableHighEntropy : 1;
+ DWORD DisallowStrippedImages : 1;
+ DWORD ReservedFlags : 28;
+ } DUMMYSTRUCTNAME;
+ } DUMMYUNIONNAME;
+} PROCESS_MITIGATION_ASLR_POLICY, *PPROCESS_MITIGATION_ASLR_POLICY;
+
+typedef struct _PROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY {
+ union {
+ DWORD Flags;
+ struct {
+ DWORD DisableExtensionPoints : 1;
+ DWORD ReservedFlags : 31;
+ } DUMMYSTRUCTNAME;
+ } DUMMYUNIONNAME;
+} PROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY, *PPROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY;
+
+typedef struct _PROCESS_MITIGATION_DYNAMIC_CODE_POLICY {
+ union {
+ DWORD Flags;
+ struct {
+ DWORD ProhibitDynamicCode : 1;
+ DWORD AllowThreadOptOut : 1;
+ DWORD AllowRemoteDowngrade : 1;
+ DWORD AuditProhibitDynamicCode : 1;
+ DWORD ReservedFlags : 28;
+ } DUMMYSTRUCTNAME;
+ } DUMMYUNIONNAME;
+} PROCESS_MITIGATION_DYNAMIC_CODE_POLICY, *PPROCESS_MITIGATION_DYNAMIC_CODE_POLICY;
+
+typedef enum _PROCESS_MITIGATION_POLICY {
+ ProcessDEPPolicy,
+ ProcessASLRPolicy,
+ ProcessDynamicCodePolicy,
+ ProcessStrictHandleCheckPolicy,
+ ProcessSystemCallDisablePolicy,
+ ProcessMitigationOptionsMask,
+ ProcessExtensionPointDisablePolicy,
+ ProcessControlFlowGuardPolicy,
+ ProcessSignaturePolicy,
+ ProcessFontDisablePolicy,
+ ProcessImageLoadPolicy,
+ ProcessSystemCallFilterPolicy,
+ ProcessPayloadRestrictionPolicy,
+ ProcessChildProcessPolicy,
+ ProcessSideChannelIsolationPolicy,
+ ProcessUserShadowStackPolicy,
+ MaxProcessMitigationPolicy
+} PROCESS_MITIGATION_POLICY, *PPROCESS_MITIGATION_POLICY;
+
+#endif
+
+void ActivateProcessMitigations()
+{
+ if (ProcessMitigationsActivated)
+ return;
+
+ // we load the function pointer of SetProcessMitigationPolicy dynamically because we are building with Windows 7 SDK that does not have the definition of this function
+ typedef BOOL (WINAPI *SetProcessMitigationPolicyFunc) (PROCESS_MITIGATION_POLICY MitigationPolicy, PVOID lpBuffer, SIZE_T dwLength);
+ SetProcessMitigationPolicyFunc SetProcessMitigationPolicy = (SetProcessMitigationPolicyFunc) GetProcAddress (GetModuleHandle (L"kernel32.dll"), "SetProcessMitigationPolicy");
+ if (SetProcessMitigationPolicy)
+ {
+ PROCESS_MITIGATION_ASLR_POLICY aslrPolicy = { 0 };
+ PROCESS_MITIGATION_DYNAMIC_CODE_POLICY dynCodePolicy = { 0 };
+ PROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY extensionPointDisablePolicy = { 0 };
+
+ aslrPolicy.EnableBottomUpRandomization = TRUE;
+ aslrPolicy.EnableForceRelocateImages = TRUE;
+ aslrPolicy.EnableHighEntropy = TRUE;
+
+ dynCodePolicy.ProhibitDynamicCode = TRUE;
+
+ extensionPointDisablePolicy.DisableExtensionPoints = TRUE;
+
+ SetProcessMitigationPolicy (ProcessASLRPolicy, &aslrPolicy, sizeof (aslrPolicy));
+ SetProcessMitigationPolicy (ProcessDynamicCodePolicy, &dynCodePolicy, sizeof (dynCodePolicy));
+ SetProcessMitigationPolicy (ProcessExtensionPointDisablePolicy, &extensionPointDisablePolicy, sizeof (extensionPointDisablePolicy));
+ }
+
+ ProcessMitigationsActivated = TRUE;
+}
+
// Based on sample code from:
// https://blogs.msdn.microsoft.com/aaron_margosis/2009/06/06/faq-how-do-i-start-a-program-as-the-desktop-user-from-an-elevated-app/
// start a program non-elevated as the desktop user from an elevated app
diff --git a/src/Common/Dlgcode.h b/src/Common/Dlgcode.h
index 12957232..245df6c1 100644
--- a/src/Common/Dlgcode.h
+++ b/src/Common/Dlgcode.h
@@ -349,6 +349,7 @@ BOOL IsTrueCryptInstallerRunning (void);
uint32 ReadDriverConfigurationFlags ();
uint32 ReadServiceConfigurationFlags ();
uint32 ReadEncryptionThreadPoolFreeCpuCountLimit ();
+BOOL ReadMemoryProtectionConfig ();
BOOL LoadSysEncSettings ();
int LoadNonSysInPlaceEncSettings (WipeAlgorithmId *wipeAlgorithm);
void RemoveNonSysInPlaceEncNotifications (void);
@@ -582,7 +583,8 @@ BOOL VerifyModuleSignature (const wchar_t* path);
void GetInstallationPath (HWND hwndDlg, wchar_t* szInstallPath, DWORD cchSize, BOOL* pbInstallPathDetermined);
BOOL GetSetupconfigLocation (wchar_t* path, DWORD cchSize);
BOOL BufferHasPattern (const unsigned char* buffer, size_t bufferLen, const void* pattern, size_t patternLen);
-BOOL EnableProcessProtection();
+void ActivateProcessMitigations();
+BOOL ActivateMemoryProtection();
void SafeOpenURL (LPCWSTR szUrl);
BitLockerEncryptionStatus GetBitLockerEncryptionStatus(WCHAR driveLetter);
BOOL IsTestSigningModeEnabled ();
diff --git a/src/Common/Tcdefs.h b/src/Common/Tcdefs.h
index 1b6189a3..8027f58b 100644
--- a/src/Common/Tcdefs.h
+++ b/src/Common/Tcdefs.h
@@ -344,8 +344,12 @@ extern BOOLEAN VC_KeAreAllApcsDisabled (VOID);
#ifndef TC_LOCAL_WIN32_WINNT_OVERRIDE
# undef _WIN32_WINNT
+#ifdef _M_ARM64
+# define _WIN32_WINNT 0x0A00
+#else
# define _WIN32_WINNT 0x0601 /* Does not apply to the driver */
#endif
+#endif
#include <windows.h> /* Windows header */
#include <commctrl.h> /* The common controls */