Security update for cyrus-imapd (important)

Previous versions of cyrus-imapd would not allow its users to disable
old protocols like SSLv1 and SSLv2 that are unsafe due to various known
attacks like BEAST and POODLE.
<a href=“https://bugzilla.cyrusimap.org/show_bug.cgi?id=3867”>https://bugzilla.cyrusimap.org/show_bug.cgi?id=3867</a> remedies this issue
by adding the configuration option ‘tls_versions’ to the imapd.conf
file. Note that users who upgrade existing installation of this package
will not have their imapd.conf file overwritten, i.e. their IMAP
server will continue to support SSLv1 and SSLv2 like before. To disable
support for those protocols, it’s necessary to edit imapd.conf manually
to state "tls_versions: tls1_0 tls1_1 tls1_2". New installations,
however, will have an imapd.conf file that contains these settings
already, i.e. newly installed IMAP servers do not support SSLv1 and
SSLv2 unless that support is explicitly enabled by the user. (bsc#901748)

• An integer overflow vulnerability in cyrus-imapd’s urlfetch range
  checking code was fixed. (CVE-2015-8076, CVE-2015-8077, CVE-2015-8078,
  bsc#981670, bsc#954200, bsc#954201)

• Support for Elliptic Curve Diffie–Hellman (ECDH) has been added to
  cyrus-imapd. (bsc#860611)