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SIGNAL When iMessage fails, your messages go out in the clear When iMessage drops out, your iPhone falls back to SMS or unencrypted RCS without a real warning. Three Messages settings stop the fallback. Read the radar

When iMessage or encrypted RCS drops out, Messages moves the conversation to unencrypted RCS, SMS or MMS, in the same thread. No alert, just a discreet mention. Three iPhone settings shut these fallbacks down. An iMessage that can't go out encrypted then stays failed, and you decide whether to send it anyway.


What you need to do

1. Turn off Resend as Text Message (Retry as Text Message on some iPhones), in Settings > Apps > Messages. An iMessage that fails stays failed instead of going out as SMS.

2. Turn off RCS Messaging, in its own submenu, if you want no fallback to unencrypted RCS. You also lose encrypted RCS, where your carrier offers it. In France, Orange, SFR, Bouygues Telecom and Free offer RCS, none encrypts it on iPhone yet, so you lose no encryption.

3. Turn off MMS Messaging. Even with the SMS fallback off, Messages can still fall back to MMS.

ALERT Self-hosted Nextcloud, a Collabora flaw already exploited A critical flaw in Nextcloud's built-in Collabora opens your server without a password. Check, hunt for the intruder, update it or remove it. Read the radar

A critical flaw in Nextcloud's built-in Collabora lets anyone run commands on your server without a single password, and administrators have already found backdoors on theirs. A patched built-in Collabora has been available since September 11 for Nextcloud 30 and later, but updating it does not evict an intruder who is already in.


What you need to do

1. Check whether the built-in Collabora (the richdocumentscode app) is installed on your Nextcloud, and which version. Before version 26.4.303 of the built-in Collabora, you are exposed. A Collabora installed separately, connected through Nextcloud Office, is not affected.

2. Hunt for a backdoor before you patch, unexpected PHP files in the built-in Collabora folder and suspicious requests in your logs since September 10.

3. Update the built-in Collabora to 26.4.303 or later, or remove it. Disabling it is not enough. If your Nextcloud runs version 29 or older, this update is not offered to you, update Nextcloud first. Aim for Nextcloud 33 or later in any case, earlier versions are no longer maintained.

4. If you find an intruder, change every secret your web server can read. The commands are in the full radar.


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Mack
Mack

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