Remove 3DES by default for users of older crypto librarys; the cipher

has been reclassified in current OpenSSL releases as WEAK due to 112
or fewer bits of remaining cipher strength, while the Sweet32 disclosure
extended the criticism of RC4 on to 3DES. (IDEA, which potentially has the
same issue, is never enabled by default in OpenSSL, due to patent concerns.)

This commit does not change default httpd behavior, but alters the suggested
behavior of newly provisioned httpd servers. Where adopted, XP with IE8 will
no longer handshake with mod_ssl (previously, XP with IE6 would not handshake.)
The same net effect occurs where OpenSSL is updated to 1.1.0.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1795359 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/conf/extra/httpd-ssl.conf.in b/docs/conf/extra/httpd-ssl.conf.in
index f093b328a53e592b3810b495c95718bf44da5580..6a3c67a0e30263de0374d50e1e3ae2ad28f2d2f4 100644 (file)
--- a/docs/conf/extra/httpd-ssl.conf.in
+++ b/docs/conf/extra/httpd-ssl.conf.in
@@ -49,8 +49,8 @@ Listen @@SSLPort@@
 #   ensure these follow appropriate best practices for this deployment.
 #   httpd 2.2.30, 2.4.13 and later force-disable aNULL, eNULL and EXP ciphers,
 #   while OpenSSL disabled these by default in 0.9.8zf/1.0.0r/1.0.1m/1.0.2a.
-SSLCipherSuite HIGH:MEDIUM:!MD5:!RC4
-SSLProxyCipherSuite HIGH:MEDIUM:!MD5:!RC4
+SSLCipherSuite HIGH:MEDIUM:!MD5:!RC4:!3DES
+SSLProxyCipherSuite HIGH:MEDIUM:!MD5:!RC4:!3DES
 
 #  By the end of 2016, only TLSv1.2 ciphers should remain in use.
 #  Older ciphers should be disallowed as soon as possible, while the