5/27/2023 0 Comments Bitwarden web vault![]() ![]() I do get why BW does it how it does it, and I do get having sane/safe defaults. For me, having it work the way I want is still extremely secure because of my setup. A bad actor would have to jump through numerous hoops to get to my machine to be able to access my BW if it was unlocked. Not everyone has the same threat landscape. But security is, ultimately, a decision users make. I have not tested other browser extensions. Whether such a threat model is widely applicable or not, users have the expectation that encrypted vault data is removed from persistent storage upon logout this expectation is not met for the Chrome extension. Using copied values of the fields "email", "kdfIterations", and "keyHash", the master password can be brute-forced if it is sufficiently weak, which would then allow a bad actor to access the web vault. The vault data can be easily be exfiltrated by anybody who has physical access to the computer for a short time, whether the computer is on or off. In effect, there appears to be no practical security difference between the locked state and the logged out state. The stored *.log file contains one or more copies of the encrypted vault, which persists even after logging out of the vault, exiting Chrome, and rebooting the computer, By scanning through the file, or by using search terms such as those suggested above, the full contents of the vault are revealed, including the email account in plaintext, the hashed version of the Master Key, as well as encrypted cipher strings containing all secrets. Thus, the *.log file (which contains vault data for the Chrome extension) should be deleted, or contain only a skeleton template structure with non-existent entries for "email", "keyHash", "login", "password", etc., or (at worst) empty values for all fields that hold secret/sensitive information. () makes the claim: **"Logging out of your vault completely removes all vault data from your device."** If the user has logged out, the vault should be expunged from persistent storage. ![]() Optionally, use Edit/Find to search for terms such as "keyHash", "email", "login", "password", etc. Open the most recent *.log file using NotepadĦ. ![]() Navigate to %LocalAppData%\Google\Chrome\User Data\Default\Local Extension Settings\nngceckbapebfimnlniiiahkandclblbĥ. Log out o … f vault on Chrome extensionĤ.
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