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/2.2.x@1795360 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/conf/extra/httpd-ssl.conf.in b/docs/conf/extra/httpd-ssl.conf.in
index 3eeb8de1b966a4bd76a7163cfd0f13408a74dfaa..0c8abcf38e4eeb46bb1d0a1fc0a1f693916a6581 100644 (file)
--- a/docs/conf/extra/httpd-ssl.conf.in
+++ b/docs/conf/extra/httpd-ssl.conf.in
@@ -56,8 +56,8 @@ AddType application/x-pkcs7-crl    .crl
 #   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