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Today, Nextcloud 15 has been made available. As there is so much new and improved in this release, we have dedicated separate blogs to each main area of improvement. This blog covers our work in the area of security hardening and new security capabilities.
Security continues to be a key concern for Nextcloud users. To improve the protection of Nextcloud servers, this release enables administrators to control and enforce two-factor authentication globally or on a group-by-group base. New are also one-time codes for system administrators, to be used when the 2nd factor is unavailable.
All users will be warned to generate their one-time codes as soon as possible and store them somewhere safe. Administrators have command-line control over 2FA, in case they or users are locked out of their account.
To lower the effort of using the second factor for secure authentication, notifications from devices already authenticated can be used as second factor. This way, a mobile device can approve authentication in a browser, or the desktop client can approve authentication on a phone. The user simply gets a notification and can approve it.
Receiving a notification on iPad
Receiving a notification on Android
Simply tap approve to log in
To harden Nextcloud further, this release brings more strict CSP (Content Security Policy) rules providing even deeper protection from Cross-Site Scripting vulnerabilities. The third generation of our App tokens improves handling on external password change. This reduces the number of times users have to re-authorize their client applications as the clients can get re-authorized automatically, provided one of the users’ logins is valid.
Manage app tokens in Nextcloud
Our CSP no longer by default allows unsafe-eval. This blocks the javascript eval function. Developers can effectively no longer
interpret text as instructions. you could do
eval('alert(1)')
And it would just work. Now it no longer does. This means app developers will have to update their app and keep this limitation in mind. But code injection attacks by a hacker become significantly harder with our stricter CSP.
Over the last 2 years, our App Token technology evolved from app tokens which were invalidated whenever the user changed their password (V1) to public key app tokens that would be updated on password change (V2). V3 is adapted to work with LDAP or other external authentication mechanisms. While we still can’t update app tokens when you change your LDAP password, upon the first login in the web or any client, all app tokens are updated.
“When we have welcoming communities of contributors, open source software gets better and more useful to everyone.” Limor Fried, Electrical Engineer, Inventor and Founder of open-source hardware company Adafruit We believe in this ideal and love to work with our community. We are always looking to involve more people in Nextcloud, bringing in their ideas, […]
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When cables are cut, sanctions are put in place or privacy legislation prohibits the use of the service your entire organization depends on, what can you do? Amidst geo-political changes, organizations face dependencies on large, centralized communication platforms. A major example of this is the SaaS-only communication platform Microsoft Teams. It is the only solution […]
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The Nextcloud Conference is not your average event - it's a community meetup that brings together Nextcloud enthusiasts, contributors, developers, users and industry experts from all over the world.
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To aid government and business organizations migrating away from Microsoft 365, the Nextcloud Office team is looking for participants for UX studies. In particular, heavy users of Microsoft Office are encouraged to participate and provide their input so the team can identify and address the key blockers for migration. Aim of the study Nextcloud is […]
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