The Apache web server must remove all export ciphers to protect the confidentiality and integrity of transmitted information.

From Apache Server 2.4 Windows Server Security Technical Implementation Guide

Part of SRG-APP-000439-WSR-000188

Associated with: CCI-002418

AS24-W1-000900_rule The Apache web server must remove all export ciphers to protect the confidentiality and integrity of transmitted information.

Vulnerability discussion

During the initial setup of a Transport Layer Security (TLS) connection to the Apache web server, the client sends a list of supported cipher suites in order of preference. The Apache web server will reply with the cipher suite it will use for communication from the client list. If an attacker can intercept the submission of cipher suites to the Apache web server and place, as the preferred cipher suite, a weak export suite, the encryption used for the session becomes easy for the attacker to break, often within minutes to hours.

Check content

In a command line, navigate to "<'INSTALLED PATH'>\bin". Run "httpd -M" to view a list of installed modules. If the "ssl_module" is not enabled, this is a finding. Review the <'INSTALL PATH'>\conf\httpd.conf file to determine if the "SSLProtocol" directive exists and looks like the following: SSLProtocol -ALL +TLSv1.2 If the directive does not exist or exists but does not contain "ALL -SSLv2 -SSLv3", this is a finding.

Fix text

Ensure the "SSLProtocol" is added and looks like the following in the <'INSTALL PATH'>\conf\httpd.conf file: SSLProtocol -ALL +TLSv1.2 Restart the Apache service.

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