Merge r1679428, r1679432 from trunk:

Conform to RFC 7525, with additional suggestion to drop RSA Kx ciphers

Document RFC 7525 changes
Submitted by: wrowe
Reviewed/backported by: jim

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1679987 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/CHANGES b/CHANGES
index cdba0c535e035870da49a6d59d9376b362ac3319..e7b5e903124df8c3c14be69f4309991dd98925ed 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -12,6 +12,12 @@ Changes with Apache 2.4.13
      calls r:wsupgrade() can cause a child process crash. 
      [Edward Lu <Chaosed0 gmail.com>]
 
+  *) In alignment with RFC 7525, the default recommended SSLCipherSuite
+     and SSLProxyCipherSuite now exclude RC4 as well as MD5. Also, the
+     default recommended SSLProtocol and SSLProxyProtocol directives now
+     excludes SSLv3. Existing configurations must be adjusted by the
+     administrator. [William Rowe]
+
   *) mod_ssl: Add support for extracting subjectAltName entries of type
      rfc822Name and dNSName into SSL_{CLIENT,SERVER}_SAN_{Email,DNS}_n
      environment variables. Also addresses PR 57207. [Kaspar Brand]

diff --git a/STATUS b/STATUS
index c874431a8b3c25e195240e0981b305fabac13c06..5c05cf4ec256cd2bc17a647f0fadaa9a01c3d5dc 100644 (file)
--- a/STATUS
+++ b/STATUS
@@ -105,13 +105,6 @@ RELEASE SHOWSTOPPERS:
 PATCHES ACCEPTED TO BACKPORT FROM TRUNK:
   [ start all new proposals below, under PATCHES PROPOSED. ]
 
-  *) Propose a more modern Cipher and Protocol list, honor server cipher
-     priority and add explanations relative to RFC 7525 guidance.
-                  http://svn.apache.org/r1679428
-                  http://svn.apache.org/r1679432 [CHANGES]
-     2.4.x patch: trunk works (modulo CHANGES)
-     +1: wrowe, ylavic, jim
-
   *) Always prepend "!aNULL:!eNULL:" to SSL_DEFAULT_CIPHER_LIST (default for
      SSL[Proxy]CipherSuite) since we support OpenSSL versions where this was
      not yet included by default (follow up to merge r1542327 in 2.4.7).

diff --git a/docs/conf/extra/httpd-ssl.conf.in b/docs/conf/extra/httpd-ssl.conf.in
index 246b3dd7417e2448bf76e903214b54bdea875541..6789ec23026be728360b9e705afd1e7339a1ff17 100644 (file)
--- a/docs/conf/extra/httpd-ssl.conf.in
+++ b/docs/conf/extra/httpd-ssl.conf.in
@@ -43,22 +43,39 @@ Listen @@SSLPort@@
 ##
 
 #   SSL Cipher Suite:
-#   List the ciphers that the client is permitted to negotiate.
-#   See the mod_ssl documentation for a complete list.
-SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5
+#   List the ciphers that the client is permitted to negotiate,
+#   and that httpd will negotiate as the client of a proxied server.
+#   See the OpenSSL documentation for a complete list of ciphers, and
+#   ensure these follow appropriate best practices for this deployment.
+SSLCipherSuite HIGH:MEDIUM:!MD5:!RC4
+SSLProxyCipherSuite HIGH:MEDIUM:!MD5:!RC4
 
-#   Speed-optimized SSL Cipher configuration:
-#   If speed is your main concern (on busy HTTPS servers e.g.),
-#   you might want to force clients to specific, performance
-#   optimized ciphers. In this case, prepend those ciphers
-#   to the SSLCipherSuite list, and enable SSLHonorCipherOrder.
-#   Caveat: by giving precedence to RC4-SHA and AES128-SHA
-#   (as in the example below), most connections will no longer
-#   have perfect forward secrecy - if the server's key is
-#   compromised, captures of past or future traffic must be
-#   considered compromised, too.
-#SSLCipherSuite RC4-SHA:AES128-SHA:HIGH:MEDIUM:!aNULL:!MD5
-#SSLHonorCipherOrder on 
+#  By the end of 2016, only TLSv1.2 ciphers should remain in use.
+#  Older ciphers should be disallowed as soon as possible, while the
+#  kRSA ciphers do not offer forward secrecy.  These changes inhibit
+#  older clients (such as IE6 SP2 or IE8 on Windows XP, or other legacy
+#  non-browser tooling) from successfully connecting.  
+#
+#  To restrict mod_ssl to use only TLSv1.2 ciphers, and disable
+#  those protocols which do not support forward secrecy, replace
+#  the SSLCipherSuite and SSLProxyCipherSuite directives above with
+#  the following two directives, as soon as practical.
+# SSLCipherSuite HIGH:MEDIUM:!SSLv3:!kRSA
+# SSLProxyCipherSuite HIGH:MEDIUM:!SSLv3:!kRSA
+
+#   User agents such as web browsers are not configured for the user's
+#   own preference of either security or performance, therefore this
+#   must be the prerogative of the web server administrator who manages
+#   cpu load versus confidentiality, so enforce the server's cipher order.
+SSLHonorCipherOrder on 
+
+#   SSL Protocol support:
+#   List the protocol versions which clients are allowed to connect with.
+#   Disable SSLv3 by default (cf. RFC 7525 3.1.1).  TLSv1 (1.0) should be
+#   disabled as quickly as practical.  By the end of 2016, only the TLSv1.2
+#   protocol or later should remain in use.
+SSLProtocol all -SSLv3
+SSLProxyProtocol all -SSLv3
 
 #   Pass Phrase Dialog:
 #   Configure the pass phrase gathering process.