securitysoftware

Password Managers: Under the Hood

Password managers allow the storage and retrieval of sensitive information from an encrypted database. Users rely on them to provide better security guarantees against trivial exfiltration than alternative ways of storing passwords, such as an unsecured flat text file. In this paper we propose security guarantees password managers should offer and examine the underlying workings of five popular password managers targeting the Windows 10 platform: 1Password 7 [1], 1Password 4 [1], Dashlane [2], KeePass [3], and LastPass [4]. We anticipated that password managers would employ basic security best practices, such as scrubbing secrets from memory when they are not in use and sanitization of memory once a password manager was logged out and placed into a locked state. However, we found that in all password managers we examined, trivial secrets extraction was possible from a locked password manager, including the master password in some cases, exposing up to 60 million users that use the password managers in this study to secrets retrieval from an assumed secure locked state