(The defaults require a minimum of 12-character master passwords and specify a high number of iterations-100,100-in the PBKDF2 password-strengthening algorithm.)Ī brute-force decryption might be successful against your master password if you reused it on another site that had been compromised, set one that’s fewer than 12 characters (never do that!), or lowered the default password-strengthening settings. What Actions Should LastPass Users Take?Īs long as you used your LastPass master password only at LastPass and retained the company’s default settings, LastPass does not recommend any actions at this time. Apple’s iCloud Keychain, 1Password’s cloud-based storage, and some other solutions mix device-based keys with master passwords or account logins for far greater resistance-an attacker has to obtain and unlock a device in addition to compromising a vault or account password. Even though the company has hardened minimum requirements for setting passwords, users can set master passwords weak enough to be susceptible to cracking attempts. More seriously, LastPass relies entirely on that user-selected master password to secure encrypted data. Within user vaults, however, website URLs associated with password entries weren’t encrypted. LastPass secures usernames, passwords, secure notes, and form-filled data using 256-bit AES encryption, and they can be decrypted only with a unique encryption key derived from each user’s master password. The stolen data included unencrypted customer account information (names, addresses, and phone numbers, but not credit card details) and encrypted customer vault data. This incident highlights weaknesses in LastPass’s approach to security. (Arguably, these events are all part of a single breach.) Although LastPass’s on-premises production environment was not breached, the attacker was able to leverage information captured in an earlier breach of a developer’s account in August 2022 to target another employee’s account in order to steal data from cloud-based storage that LastPass used for backup. ![]() ![]() LastPass has been fairly transparent about the breach, posting when it happened and following up this week with additional details. This safeguard should prevent the attackers from decrypting the stolen usernames and passwords. This could be a nightmare situation for LastPass, but most users shouldn’t be at significant risk because the company’s Zero Knowledge security architecture prevents it from having access to or knowledge of a user’s master password-the stolen data doesn’t contain any master passwords. LastPass CEO Karim Toubba has announced that the password management company suffered a security breach last month, with attackers making off with unencrypted customer account data and customer vaults containing encrypted usernames and passwords. LastPass Shares Details of Security Breach #1658: Rapid Security Responses, NYPD and industry standard AirTag news, Apple's Q2 2023 financials.#1659: Exposure notifications shut down, cookbook subscription service, alarm notification type proposal, Explain XKCD.#1660: OS updates for sports and security, Drobo in bankruptcy, why TidBITS doesn't cover rumors. ![]() ![]() #1661: Mimestream app for Gmail, auto-post WordPress headlines to Twitter and Mastodon, My Photo Stream shutting down.#1662: New Macs, 12 top OS features for 2023, vertical tabs in Web browsers, watchOS 9.5.1.
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