Date: Mon, 15 Jun 2015 04:18:30 +0000 (UTC) From: Gregory Neil Shapiro <gshapiro@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r284403 - head Message-ID: <201506150418.t5F4IUJh047328@svn.freebsd.org>
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Author: gshapiro Date: Mon Jun 15 04:18:29 2015 New Revision: 284403 URL: https://svnweb.freebsd.org/changeset/base/284403 Log: Add a quick (?) note for users who may be having sendmail interoperability issues due to the recent (FreeBSD-SA-15:10.openssl) OpenSSL change to reject 512 bit DH parameters. Affects 11-CURRENT and 10-STABLE. Modified: head/UPDATING Modified: head/UPDATING ============================================================================== --- head/UPDATING Mon Jun 15 01:04:01 2015 (r284402) +++ head/UPDATING Mon Jun 15 04:18:29 2015 (r284403) @@ -31,6 +31,30 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11 disable the most expensive debugging functionality run "ln -s 'abort:false,junk:false' /etc/malloc.conf".) +20150614: + The import of openssl to address the FreeBSD-SA-15:10.openssl + security advisory includes a change which rejects handshakes + with DH parameters below 768 bits. sendmail releases prior + to 8.15.2 (not yet released), defaulted to a 512 bit + DH parameter setting for client connections. To work around + this interoperability, sendmail can be configured to use a + 2048 bit DH parameter by: + + 1. Edit /etc/mail/`hostname`.mc + 2. If a setting for confDH_PARAMETERS does not exist or + exists and is set to a string beginning with '5', + replace it with '2'. + 3. If a setting for confDH_PARAMETERS exists and is set to + a file path, create a new file with: + openssl dhparam -out /path/to/file 2048 + 4. Rebuild the .cf file: + cd /etc/mail/; make; make install + 5. Restart sendmail: + cd /etc/mail/; make restart + + A sendmail patch is coming, at which time this file will be + updated. + 20150604: Generation of legacy formatted entries have been disabled by default in pwd_mkdb(8), as all base system consumers of the legacy formatted
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