Bug 1274890 - mod_ssl config: tighten defaults
Summary: mod_ssl config: tighten defaults
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: httpd
Version: 7.1
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: Luboš Uhliarik
QA Contact: Maryna Nalbandian
Lenka Špačková
URL: https://bugzilla.redhat.com/show_bug....
: 1388068 1428434 1457785 1492637 (view as bug list)
Depends On:
Blocks: 1203710 1298243 1420851 1465904 1466370 1473733 1492637
TreeView+ depends on / blocked
Reported: 2015-10-23 18:49 UTC by Pat Riehecky
Modified: 2018-04-10 14:47 UTC (History)
15 users (show)

`SSLv3` disabled in *mod_ssl*

To improve the security of SSL/TLS connections, the default configuration of the *httpd mod_ssl* module has been changed to disable support for the `SSLv3` protocol, and to restrict the use of certain cryptographic cipher suites. This change will affect only fresh installations of the _mod_ssl_ package, so existing users should manually change the SSL configuration as required.

Any SSL clients attempting to establish connections using `SSLv3`, or using a cipher suite based on `DES` or `RC4`, will be denied in the new default configuration. To allow such insecure connections, modify the `SSLProtocol` and `SSLCipherSuite` directives in the `/etc/httpd/conf.d/ssl.conf` file.
Clone Of: 1274876
: 1492637 (view as bug list)
Last Closed: 2018-04-10 14:45:22 UTC

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:0826 None None None 2018-04-10 14:47 UTC

Description Pat Riehecky 2015-10-23 18:49:10 UTC
Verified on default EL7

+++ This bug was initially created as a clone of Bug #1274876 +++

Description of problem:
The default configuration of mod_ssl in EL5 permits SSLv3 connections.  Per CVE-2014-3566 this protocol is known to be a security risk.

Version-Release number of selected component (if applicable):mod_ssl-2.2.3-87

How reproducible:100%

Steps to Reproduce:
1.Install apache with mod_ssl
2.enable connections to port 443 via apache mod_ssl using the default config
3.test a SSLv3 connection

Actual results:
SSLv3 connections are permitted

Expected results:
Since SSLv3 has known security issues, I expected it to be disabled by default.

Additional info:

Comment 3 Jim Lyle 2015-12-11 15:36:58 UTC
Potention Patch:

--- SOURCES/ssl.conf    2015-10-30 10:26:57.000000000 -0500
+++ SOURCES/ssl.conf    2015-10-30 10:27:12.000000000 -0500
@@ -96,8 +96,8 @@ SSLEngine on
 #   SSL Protocol support:
 # List the enable protocol levels with which clients will be able to
-# connect.  Disable SSLv2 access by default:
-SSLProtocol all -SSLv2
+# connect.  Disable SSLv2/v3 access by default:
+SSLProtocol all -SSLv2 -SSLv3
 #   SSL Cipher Suite:
 # List the ciphers that the client is permitted to negotiate.

Comment 4 Luboš Uhliarik 2016-12-06 11:09:41 UTC
*** Bug 1388068 has been marked as a duplicate of this bug. ***

Comment 6 Joe Orton 2017-07-13 15:44:45 UTC
*** Bug 1457785 has been marked as a duplicate of this bug. ***

Comment 7 Joe Orton 2017-07-13 15:45:15 UTC
*** Bug 1428434 has been marked as a duplicate of this bug. ***

Comment 11 Branislav Náter 2017-11-01 16:06:43 UTC
*** Bug 1492637 has been marked as a duplicate of this bug. ***

Comment 19 errata-xmlrpc 2018-04-10 14:45:22 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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