Security update for cyrus-imapd

Open Source Vulnerabilities SUSE-SU-2016:1459-1

This update for cyrus-imapd fixes the following issues: - Previous versions of cyrus-imapd would not allow its users to disable old SSL variants that are vulnerable to attacks like BEAST and POODLE. This patch adds the configuration option 'tls_versions' to remedy that issue. Note that users who upgrade an existing installation will *not* have their imapd.conf file overwritten, i.e. their IMAP server will continue to support SSLv2 and SSLv3 like before. To disable support for those protocols, edit imapd.conf manually to include '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 unsafe versions of SSL 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)