Slackware Chanagelog/Security wrote:

Wed Feb  6 00:29:25 UTC 2019
ap/linuxdoc-tools-0.9.73-i586-1.txz:  Upgraded.
  Upgraded to gtk-doc-1.29.
  Upgraded to asciidoc-8.6.10.
  Upgraded to perl-XML-SAX-1.00.
  Thanks to Stuart Winter.
d/meson-0.49.2-i586-1.txz:  Upgraded.
d/python-setuptools-40.8.0-i586-1.txz:  Upgraded.
d/slacktrack-2.19-i586-1.txz:  Upgraded.
  Thanks to Stuart Winter.
l/imagemagick-6.9.10_26-i586-1.txz:  Upgraded.
n/dovecot-2.3.4.1-i586-1.txz:  Upgraded.
  This update addresses security issues:
  CVE-2019-3814: If imap/pop3/managesieve/submission client has trusted
  certificate with missing username field (ssl_cert_username_field), under
  some configurations Dovecot mistakenly trusts the username provided via
  authentication instead of failing.
  ssl_cert_username_field setting was ignored with external SMTP AUTH,
  because none of the MTAs (Postfix, Exim) currently send the cert_username
  field. This may have allowed users with trusted certificate to specify any
  username in the authentication. This bug didn't affect Dovecot's
  Submission service.
  For more information, see:
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3814
  (* Security fix *)