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Upgrade the Roundcube persistent login cookie encryption to AES-256-CBC and increase the key length accordingly

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This change will force everyone to be logged out of Roundcube since the encryption key and cipher won't match anyone's already-set cookie, but this happens anyway after every Mail-in-a-Box update since we generate a new key each time already.

Fixes #1968.
This commit is contained in:
Joshua Tauberer 2021-04-23 17:02:31 -04:00
parent 8cda58fb22
commit 2c295bcafd
2 changed files with 6 additions and 3 deletions
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1
CHANGELOG.md
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@ -5,6 +5,7 @@ In Development
--------------
* Migrate to the ECDSAP256SHA256 DNSSEC algorithm. If a DS record is set for any of your domain names that have DNS hosted on your box, you will be prompted by status checks to update the DS record.
* Roundcube's login cookie is updated to use a new encryption algorithm (AES-256-CBC instead of DES-EDE-CBC).
v0.53 (April 12, 2021)
----------------------

8
setup/webmail.sh
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@ -91,8 +91,9 @@ fi
# ### Configuring Roundcube
# Generate a safe 24-character secret key of safe characters.
SECRET_KEY=$(dd if=/dev/urandom bs=1 count=18 2>/dev/null | base64 | fold -w 24 | head -n 1)
# Generate a secret key of PHP-string-safe characters appropriate
# for the cipher algorithm selected below.
SECRET_KEY=$(dd if=/dev/urandom bs=1 count=32 2>/dev/null | base64 | sed s/=//g)
# Create a configuration file.
#
@ -126,7 +127,8 @@ cat > $RCM_CONFIG <<EOF;
);
\$config['support_url'] = 'https://mailinabox.email/';
\$config['product_name'] = '$PRIMARY_HOSTNAME Webmail';
\$config['des_key'] = '$SECRET_KEY';
\$config['cipher_method'] = 'AES-256-CBC'; # persistent login cookie and potentially other things
\$config['des_key'] = '$SECRET_KEY'; # 37 characters -> ~256 bits for AES-256, see above
\$config['plugins'] = array('html5_notifier', 'archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'persistent_login', 'carddav');
\$config['skin'] = 'elastic';
\$config['login_autocomplete'] = 2;