![]() When the Vault is locked, this data is purged from memory. This is needed to decrypt data in your Vault. Your encryption key (Symmetric Key) is kept in memory while the app is unlocked. We do not keep the Master Password stored locally or in memory on the Bitwarden Client. The Master Password is cleared from memory after usage Obviously, the same expectations would also hold when one has logged out of an account, which is supposed to be even more safe than locking the vault ( "Logging out of your vault completely removes all vault data from your device" ). Repeat Steps 6-8 for various states of the vault.īased on Bitwarden documentation cited below, I expect the master password to either never be stored in process memory ( "We do not keep the Master Password stored locally or in memory on the Bitwarden Client" ), or at worst, be stored only temporarily until it is no longer needed ( "The Master Password is cleared from memory after usage" )- i.e., after calculation of the Master Key and Master Password Hash.įurthermore, I expect all vault data (i.e., decrypted secrets) to be to be cleared from process memory either immediately upon locking the vault ( "memory is cleaned up whenever the application is locked" ,), or at worst, within 10 seconds after locking the vault ( "We also reload the application's renderer process after 10 seconds of inactivity on the lock screen to make sure any managed memory addresses which have not yet been garbage collected are purged" ).(In HxD, go to Search > Find > Text-string, enter the search string, set the search direction to "All", and click Search All). In the memory inspector utility, search the process memory for strings of interest, such as the master password, or contents of known vault items. ![]() In the memory inspector utility, refresh the view of the process memory.In the Bitwarden client app, perform the various actions described in the results section below (e.g., type master password on login screen, log in, lock, log out) after each action, click the "X" in the top right corner of the Bitwarden app to "close" the app to the systray, then bring another app into focus (e.g., the memory inspector app), and wait 10 seconds or longer (up to 4 hours in my tests) before proceeding with the memory search described in Steps 7-8 below.The Bitwarden desktop app has four processes, but only one of those will contain the decrypted vault and master password you may need to repeat the memory searches described below in all four memory regions to find the correct process, but in my experience it is typically the process at the top of the list that contains the information we are looking for. (In HxD, go to Tools > Open main memory). ![]() In the memory inspector utility, open the process memory for the Bitwarden client app.My results shown below are for the Desktop app, but I have confirmed that the same vulnerability exists in the Chrome browser extension, as well as in the web vault. ![]()
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