A private web server must utilize an approved TLS version.

From APACHE SITE 2.2 for Unix Security Technical Implementation Guide

Part of WG340

Associated with IA controls: ECSC-1

SV-33029r2_rule A private web server must utilize an approved TLS version.

Vulnerability discussion

Transport Layer Security (TLS) encryption is a required security setting for a private web server. Encryption of private information is essential to ensuring data confidentiality. If private information is not encrypted, it can be intercepted and easily read by an unauthorized party. A private web server must use a FIPS 140-2 approved TLS version, and all non-FIPS-approved SSL versions must be disabled.FIPS 140-2 approved TLS versions include TLS V1.0 or greater. NIST SP 800-52 specifies the preferred configurations for government systems.

Check content

Enter the following command: /usr/local/apache2/bin/httpd –M |grep -i ssl This will provide a list of all the loaded modules. Verify that the “ssl_module” is loaded. If this module is not found, determine if it is loaded as a dynamic module. Enter the following command: grep ^LoadModule /usr/local/apache2/conf/httpd.conf If the SSL module is not enabled this is a finding. After determining that the ssl module is active, enter the following command to review the SSL directives. grep -i ssl /usr/local/apache2/conf/httpd.conf Review the SSL section(s) of the httpd.conf file, all enabled SSLProtocol directives must be set to “ALL -SSLv2 -SSLv3” or this is a finding. NOTE: For Apache 2.2.22 and older, all enabled SSLProtocol directives must be set to "TLSv1" or this is a finding. All enabled SSLEngine directive must be set to “on”, if not this is a finding. NOTE: In some cases web servers are configured in an environment to support load balancing. This configuration most likely utilizes a content switch to control traffic to the various web servers. In this situation, the TLS certificate for the web sites may be installed on the content switch vs the individual web sites. This solution is acceptable as long as the web servers are isolated from the general population LAN. Users should not have the ability to bypass the content switch to access the web sites.

Fix text

Edit the httpd.conf file and set the SSLProtocol to "ALL -SSLv2 -SSLv3" and the SSLEngine to On. For Apache 2.2.22 and older, set SSLProtocol to "TLSv1".

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