Then, is there any way to fix this without reinstalling. I would like to avoid that suggestion, as I have many important VMs and I don't want to lose them. Sudo chmod 755 /Applications/VirtualBox.app/Contents/MacOS/componentsĪfter that, when trying to start the application I get a pop-up window saying:Įffective UID is not root (euid=501 egid=20 uid=501 gid=20) (rc=-20) So I found that in order to fix it, I should change the permissions as follows: sudo chmod 755 /Applications/VirtualBox.app/Contents/MacOS I did some research and found similar problems, most of them indicating problems with permissions. MacOS": group and/or other writable (st_mode=040777)Ĭom.501 (.): Exited with code: 1 : VirtualBox: supR3HardenedVerifyDir: Cannot trust the directory "/Applications/VirtualBox.app/Contents/ I looked in the system log (/var/log/system.log) and I found these two messages repeated every time I tried starting VirtualBox. I uninstalled the 4.3.12 version, uninstall the updates made between and, reinstalled the 5.1.4 version but the virtual machines still do not work.Suddenly and without notice, VirtualBox application doesn't start.įirst, it just didn't do anything. I uninstalled VirtualBox version 5.1.4, restart the computer and install the 4.3.12 version. The other DLL probably called LoadLibrary but didn't check the result. Sometimes the eliminated DLL is called by a buggy other DLL that loaded it, resulting in a memory access error (0xC0000001). In this case wintab32.dll wouldn't have loaded anyway (since it doesn't exist) so VBox filtering didn't make a difference. A rejection would be logged but it would not cause VirtualBox to refuse to run. While refusing to run may have been what earlier versions of the hardening function did, I suspect that the current stategy is to filter all DLLs loads and simply eliminate the DLLs we don't want. As Mpack noted (somewhere above) it's Windows that dictates what DLL's will be loaded & Virtualbox has to comply or not run. Virtualbox can't just reject the DLL itself. Scottgus1 wrote:the seemingly sane thing is to not run Virtualbox if unsigned DLLs would be loaded. In addition to running an unsecure system, 4.3 will leave you unable to use some modern OS's, like Windows 10 & newer Linux on host or guest. I would uninstall Windows Updates back to when the system was working, then see if an up-to-date Virtualbox will run. It is possible for a Windows update to mess up the Windows DLL security database and cause system DLLs to not work. Since malware writers don't sign their malware, (or else they could be caught) the seemingly sane thing is to not run Virtualbox if unsigned DLLs would be loaded. Malware can do the same thing, and Virtualbox opens up so much capability on a PC that malware can do much more damage through Virtualbox. This is how theme changers, antivirus, graphics card extensions, etc. The security hole comes from the ability for DLLs to plug themselves into other processes to change the operation of the processes. 4.3.14 was the beginning of the attempt to plug the security hole, and it took several versions to pin down how to plug it properly. Installing anything 4.3.12 or earlier doesn't solve your problem those versions don't test for the serious security hole that later versions are tripping over on your system. VBoxHardening.zip (15.43 KiB) Downloaded 318 times I'can now use my old VM's, and create new ones again. So far I've tried VBox 5.1.4, 5.1.2, 5.0.26, and I keed trying older builds, hoping to find one that works.Įdit: Ok, I've installed virtualbox 4.3, and now It is working. I've done the updates during the night, and now that I've installed VBox back, I can't start any VM on my computer, doesn't matter if it's an old one (that remained on another partition), a know working imported from another computer or a brand new one.Įverytime I try to start a VM, I get the following message: The virtual machine 'xxx' has terminated unexpectedly during startup with exit code 1 (0x1).Įrror code: E_FAIL (0x80004005), MachineWrap Yesterday, I've decided to come back to windows 7 pro 64, so I went for a clean install, did format c: and installed 7 Pro 64. The computer was running Windows 10 Pro 64 bit, and as far as I can tell, by the end of june everything was working fine. I had virtualbox 5.1 installed on my laptop, and running various virtual machines for testing and "lab" purpose, as I'm a student. I also can't start any VM with on my computer.
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