Vagrant unable to mount SMB after upgrade to 1.7.4 - vagrant

Question

I'm using vagrant on windows 8, with the hyper-v provider starting a windows server 2012 box.
Before I updated to vagrant 1.7.4 I was on version 1.7.2, and everything worked.
But after updating I am getting an error when it is trying to mount the shared folder:
The following WinRM command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!
cmdkey /add:xxx.xxx.xxx.xxx /user:DOMAIN\user /pass:Password
Stdout from the command:
Stderr from the command:
Exception calling "RegisterTaskDefinition" with "7" argument(s): "The user
name or password is incorrect. (Exception from HRESULT: 0x8007052E)"
At C:\tmp\vagrant-elevated-shell.ps1:58 char:1
+ $folder.RegisterTaskDefinition($task_name, $task, 6, $username, $password,
1, $n ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ComMethodTargetInvocation
I have replaced the details from the line:
cmdkey /add:xxx.xxx.xxx.xxx /user:DOMAIN\user /pass:Password
With placeholders for obvious reasons. I did try and run the command above in the VM and I get the following output:
CMDKEY: Credential added successfully.
So I assume it is working correctly. Has something changed or broken in 1.7.4?

Answer 1

I have figured out a fix for this.
Our password contained dollar signs ($), these were being stripped out in the vagrant-elevated-shell.ps1 script.
I have forked the vagrant repo and made the change and made a pull request - https://github.com/mitchellh/vagrant/pull/6452
To patch your local environment, you can find the communicator.rb file on your local machine at:
C:\HashiCorp\Vagrant\embedded\gems\gems\vagrant-1.7.4\plugins\communicators\winrm\communicator.rb
(provided you used the default setting in the installer)