CVE-2017-18342
Vulnerable versions: < 4.2b1
Patched version: 4.2b1
In PyYAML before 4.1, the yaml.load() API could execute arbitrary code. In other words, yaml.safe_load is not used.
Since postfix now asks us for the complete email over podop, which
includes the recipient-delimiter-and-what-follows not stripped, we need
to attempt to find both the verbatim localpart, as well as the localpart
stripped of the delimited part ….
Fixes#755
The init script was pushing an application context, which maked
flask.g global and persisted across requests. This was evaluated
to have a minimal security impact.
This explains/fixes #738: flask_wtf caches the csrf token in the
application context to have a single token per request, and only
sets the session attribute after the first generation.
In case of TLS_FLAVOR=[mail,cert], the user supplies their own certificates.
However, since nginx is not aware of changes to these files, it cannot
reload itself e.g. when the certs get renewed.
To solve this, let’s add a small daemon in the place of
`letsencrypt.py`, which uses a flexible file-watching framework and
reloads nginx in the case the certificates change ….
This will make network configuration and host based authentication
more robust, across different deployment platforms.
The options `RELAYNETS` and`POD_ADDRESS_RANGE` are kept for compatibility.
However, their usage have become optional.
To facilitate this, the default redirect at / can be disabled, even if
the default remains at redirecting to the webmailer.
The extensions are within the host scope and are read from
$ROOT/overrides/nginx/*.conf.
Tim Möhlmann