svn commit: r46837 - in head/share: security/advisories security/patches/EN-15:08 xml
Xin LI <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.doc |
|---|---|
| Message-ID | <[email protected]> |
Author: delphij
Date: Thu Jun 18 05:43:44 2015
New Revision: 46837
URL: https://svnweb.freebsd.org/changeset/doc/46837
Log:
Add EN-15:08.sendmail.
Added:
head/share/security/advisories/FreeBSD-EN-15:08.sendmail.asc (contents, props changed)
head/share/security/patches/EN-15:08/
head/share/security/patches/EN-15:08/sendmail.patch (contents, props changed)
head/share/security/patches/EN-15:08/sendmail.patch.asc (contents, props changed)
Modified:
head/share/xml/notices.xml
Added: head/share/security/advisories/FreeBSD-EN-15:08.sendmail.asc
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/security/advisories/FreeBSD-EN-15:08.sendmail.asc Thu Jun 18 05:43:44 2015 (r46837)
@@ -0,0 +1,157 @@
+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA512
+
+=============================================================================
+FreeBSD-EN-15:08.sendmail Errata Notice
+ The FreeBSD Project
+
+Topic: sendmail TLS/DH Interoperability Improvement
+
+Category: contrib
+Module: sendmail
+Announced: 2015-06-18
+Credits: Frank Seltzer, Gregory Shapiro
+Affects: All supported versions of FreeBSD.
+Corrected: 2015-06-17 02:39:10 UTC (stable/10, 10.1-STABLE)
+ 2015-06-18 05:36:45 UTC (releng/10.1, 10.1-RELEASE-p13)
+ 2015-06-17 03:11:25 UTC (stable/9, 9.3-STABLE)
+ 2015-06-18 05:36:45 UTC (releng/9.3, 9.3-RELEASE-p17)
+ 2015-06-17 03:22:18 UTC (stable/8, 8.4-STABLE)
+ 2015-06-18 05:36:45 UTC (releng/8.4, 8.4-RELEASE-p31)
+
+For general information regarding FreeBSD Errata Notices and Security
+Advisories, including descriptions of the fields above, security
+branches, and the following sections, please visit
+<URL:https://security.freebsd.org/>.
+
+I. Background
+
+sendmail supports STARTTLS encrypted connections using DHE_EXPORT
+ciphers. As part of that support, by default, sendmail employs 1024-bit
+DH parameters for server connections and 512-bit DH parameters for
+client connections.
+
+II. Problem Description
+
+In response to CVE-2015-4000 ("Logjam TLS vulnerability"), OpenSSL and
+other encryption packages have begun rejecting 512-bit and lower DH
+parameters during negotiation, thereby reducing interoperability.
+
+III. Impact
+
+In its default configuration, client connections from sendmail to other
+SMTP servers will not be able to negotiate a STARTTLS encrypted session
+with SMTP servers which reject 512-bit DH parameters. This may cause
+mail deliverability issues for outbound mail.
+
+IV. Workaround
+
+To work around this interoperability, sendmail can be configured to use
+a 1024 or 2048 bit DH parameter using these steps:
+
+ 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 '1' for 1024-bit or '2' for 2048-bit.
+ 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
+ for 2048-bit or:
+ openssl dhparam -out /path/to/file 1024
+ for 1024-bit.
+ 4. If you have modified your MSP submission configuration
+ file to enable STARTTLS (not enabled by default), repeat
+ the above steps for /etc/mail/`hostname`.submit.mc.
+ 5. Rebuild the .cf file(s):
+ cd /etc/mail/; make; make install
+ 6. Restart sendmail:
+ cd /etc/mail/; make restart
+
+Systems that do not use sendmail are not affected.
+
+V. Solution
+
+A change to the raise the default for sendmail client connections to
+1024-bit DH parameters has been committed.
+
+Perform one of the following:
+
+1) Upgrade your system to a supported FreeBSD stable or release / security
+branch (releng) dated after the correction date.
+
+2) To update your present system via a binary patch:
+
+Systems running a RELEASE version of FreeBSD on the i386 or amd64
+platforms can be updated via the freebsd-update(8) utility:
+
+# freebsd-update fetch
+# freebsd-update install
+
+3) To update your present system via a source code patch:
+
+The following patches have been verified to apply to the applicable
+FreeBSD release branches.
+
+a) Download the relevant patch from the location below, and verify the
+detached PGP signature using your PGP utility.
+
+# fetch https://security.FreeBSD.org/patches/EN-15:08/sendmail.patch
+# fetch https://security.FreeBSD.org/patches/EN-15:08/sendmail.patch.asc
+# gpg --verify sendmail.patch.asc
+
+b) Apply the patch. Execute the following commands as root:
+
+# cd /usr/src
+# patch < /path/to/patch
+
+c) Recompile the operating system using buildworld and installworld as
+described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.
+
+Restart the sendmail daemon(s), or reboot the system.
+
+VI. Correction details
+
+The following list contains the correction revision numbers for each
+affected branch.
+
+Branch/path Revision
+- -------------------------------------------------------------------------
+stable/8/ r284491
+releng/8.4/ r284536
+stable/9/ r284488
+releng/9.3/ r284536
+stable/10/ r284485
+releng/10.1/ r284536
+- -------------------------------------------------------------------------
+
+To see which files were modified by a particular revision, run the
+following command, replacing NNNNNN with the revision number, on a
+machine with Subversion installed:
+
+# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
+
+Or visit the following URL, replacing NNNNNN with the revision number:
+
+<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
+
+VII. References
+
+The latest revision of this Errata Notice is available at
+https://security.FreeBSD.org/advisories/FreeBSD-EN-15:08.sendmail.asc
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+=mvxv
+-----END PGP SIGNATURE-----
Added: head/share/security/patches/EN-15:08/sendmail.patch
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/security/patches/EN-15:08/sendmail.patch Thu Jun 18 05:43:44 2015 (r46837)
@@ -0,0 +1,24 @@
+Index: contrib/sendmail/src/tls.c
+===================================================================
+--- contrib/sendmail/src/tls.c
++++ contrib/sendmail/src/tls.c
+@@ -650,7 +650,7 @@
+ ** 1024 generate 1024 bit parameters
+ ** 2048 generate 2048 bit parameters
+ ** /file/name read parameters from /file/name
+- ** default is: 1024 for server, 512 for client (OK? XXX)
++ ** default is: 1024
+ */
+
+ if (bitset(TLS_I_TRY_DH, req))
+@@ -676,8 +676,8 @@
+ }
+ if (dhparam == NULL)
+ {
+- dhparam = srv ? "1" : "5";
+- req |= (srv ? TLS_I_DH1024 : TLS_I_DH512);
++ dhparam = "1";
++ req |= TLS_I_DH1024;
+ }
+ else if (*dhparam == '/')
+ {
Added: head/share/security/patches/EN-15:08/sendmail.patch.asc
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/security/patches/EN-15:08/sendmail.patch.asc Thu Jun 18 05:43:44 2015 (r46837)
@@ -0,0 +1,17 @@
+-----BEGIN PGP SIGNATURE-----
+Version: GnuPG v2.1.5 (FreeBSD)
+
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+=7zXU
+-----END PGP SIGNATURE-----
Modified: head/share/xml/notices.xml
==============================================================================
--- head/share/xml/notices.xml Wed Jun 17 14:37:13 2015 (r46836)
+++ head/share/xml/notices.xml Thu Jun 18 05:43:44 2015 (r46837)
@@ -11,6 +11,14 @@
<name>6</name>
<day>
+ <name>18</name>
+
+ <notice>
+ <name>FreeBSD-EN-15:08.sendmail</name>
+ </notice>
+ </day>
+
+ <day>
<name>9</name>
<notice>
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