By default, console handles are inheritable.

dlls/kernel/console.c

@@ -950,6 +950,7 @@ BOOL WINAPI AllocConsole(void)
     STARTUPINFOA        siCurrent;
     STARTUPINFOA	siConsole;
     char                buffer[1024];
+    SECURITY_ATTRIBUTES sa;
 
     TRACE("()\n");
 
@@ -988,12 +989,17 @@ BOOL WINAPI AllocConsole(void)
     if (!start_console_renderer(&siConsole))
 	goto the_end;
 
+    /* all std I/O handles are inheritable by default */
+    sa.nLength = sizeof(sa);
+    sa.lpSecurityDescriptor = NULL;
+    sa.bInheritHandle = TRUE;
+
     handle_in = CreateFileA( "CONIN$", GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,
-			     0, NULL, OPEN_EXISTING, 0, 0 );
+                             0, &sa, OPEN_EXISTING, 0, 0 );
     if (handle_in == INVALID_HANDLE_VALUE) goto the_end;
 
     handle_out = CreateFileA( "CONOUT$", GENERIC_READ|GENERIC_WRITE,
-			     0, NULL, OPEN_EXISTING, 0, 0 );
+                              0, &sa, OPEN_EXISTING, 0, 0 );
     if (handle_out == INVALID_HANDLE_VALUE) goto the_end;
 
     if (!DuplicateHandle(GetCurrentProcess(), handle_out, GetCurrentProcess(), &handle_err,