The Apache web server must maintain the confidentiality and integrity of information during reception.

From Apache Server 2.4 UNIX Site Security Technical Implementation Guide

Part of SRG-APP-000442-WSR-000182

Associated with: CCI-002422

AS24-U2-000930_rule The Apache web server must maintain the confidentiality and integrity of information during reception.

Vulnerability discussion

Information can be either unintentionally or maliciously disclosed or modified during reception, including, for example, during aggregation, at protocol transformation points, and during packing/unpacking. These unauthorized disclosures or modifications compromise the confidentiality or integrity of the information. Protecting the confidentiality and integrity of received information requires that application servers take measures to employ approved cryptography to protect the information during transmission over the network. This is usually achieved through the use of Transport Layer Security (TLS), SSL VPN, or IPsec tunnel. The Apache web server must use approved encryption when receiving transmitted data.

Check content

In a command line, run "httpd -M | grep -i ssl_module". If the "ssl_module" is not enabled, this is a finding. Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file: # httpd -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" -D SERVER_CONFIG_FILE="conf/httpd.conf" Search for the directive "SSLProtocol" in the "httpd.conf" file: # cat //httpd.conf | grep -i "SSLProtocol" If the "SSLProtocol" directive is missing or does not look like the following, this is a finding: SSLProtocol -ALL +TLSv1.2 If the TLS version is not TLS 1.2 or higher, according to NIST SP 800-52 Rev 2, or if non-FIPS-approved algorithms are enabled, this is a finding. NOTE: In some cases, web servers are configured in an environment to support load balancing. This configuration most likely uses a content switch to control traffic to the various web servers. In this situation, the TLS certificate for the websites may be installed on the content switch versus the individual websites. 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

Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" file: # httpd -V | egrep -i 'httpd_root|server_config_file' -D HTTPD_ROOT="/etc/httpd" -D SERVER_CONFIG_FILE="conf/httpd.conf" Ensure the "SSLProtocol" is added and looks like the following: SSLProtocol -ALL +TLSv1.2 Restart Apache: apachectl restart

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.

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